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3305 results about "Ferrosilicon" patented technology

Ferrosilicon is an alloy of iron and silicon with an average silicon content between 15 and 90 weight percent. It contains a high proportion of iron silicides.

Metallurgical V-N microalloying and compound deoxidation cored wire

InactiveCN102828000ASave resourcesAdjustable V/N ratioMetallic aluminumTitanium zirconium
A metallurgical V-N microalloying and compound deoxidation cored wire contains a core wire and a cladding steel belt. The technical key point of the cored wire is as follows: the core wire of the cored wire consists of a vanadium-increasing agent, a nitrogen-increasing agent and a deoxidizing nitrogen-fixing agent of which particle sizes are less than 6mm, wherein the vanadium-increasing agent is ferrovanadium, nitrided ferrovanadium or vanadium pentoxide; the nitrogen-increasing agent is ferrosilicon nitride, silicomanganese nitride, ferromanganese nitride, ferrochromium nitride, silicon nitride, aluminum nitride or calcium cyanamide; and the deoxidizing nitrogen-fixing agent contains one or more of aluminum, calcium, magnesium and barium, and can also contain one or more of titanium, zirconium, niobium, manganese, chromium, silicon, carbon and iron. By adopting the cored wire, the V / N ratio of steel can get closer to the optimal proportion, the enhancing function of vanadium can be utilized furthest, vanadium resources can be saved, the recovery rate of nitrogen is high, the nitrogen content is stable, the compound deoxidation function can also be realized, the V-N microalloying cost can be reduced and the quality of steel can be increased.
Owner:侯巍 +2

Wear-resisting alloy steel with high boron, high chrome and low carbon and preparation method thereof

The invention discloses a wear-resisting alloy steel with high boron, high chrome and low carbon and a preparation method thereof, which comprises the following chemical constituents in weight percent: 0.1-0.5% of C, 3-26% of Cr, 0.5-1.2% of Si, 0.5-1.5% of Mn, 0.3-2.8% of B, 0.3-2.6% of Cu, 0.2-0.6% of Ti, 0.02-0.15% of Ca, 0.03-0.25% of Ce, 0.02-0.18% of N, 0.05-0.3% of Nb, 0.04-0.09% of Al, 0.02-0.15% of Mg, 0.04-0.13% of K, less than 0.03% of S, less than 0.04% of P and the balance Fe and unavoidable impurity elements. The method comprises the following steps: melting steel scrap and chromium iron in an electric furnace; adding copper plates, ferrosilicon, ferromanganese into the melted steel scrap and chromium iron, heating the melt to 1560-1620 DEG C after the constituents are adjusted to be qualified in stokehold; adding calcium-silicon alloy and aluminium deoxidation into the melt; and then adding ferrotitanium and ferroboron in sequence, melting and discharging; roasting the compound inoculant composed of granular rare earth magnesium alloy with the diameter being less than 12mm and cerium metal, Si3N4, VN, Nb and K; placing the roasted compound inoculant at the bottom ofa steel ladle; carrying out modification and inoculation processes on the smelted liquid steel by pour-over method in the steel ladle, wherein, the pouring temperature of the liquid steel is 1400-1450DEG C; heating castings to 920-1150 DEG C and preserving heat for 2-4 hours; and air cooling the castings to room temperature to obtain the alloy steel in the invention. The alloy steel of the invention has the advantages of high strength, rigidity and toughness, good thermal fatigue resistance property, wear resistance, and low manufacture cost.
Owner:泰州海天机械配件有限公司

High strength aluminium alloy brazing sheet, brazed assembly and method for producing same

ActiveUS20050079376A1Good brazing propertyGood formability characteristicFurnace typesWelding/cutting media/materialsSiluminManganese
The present invention a high strength aluminium alloy brazing sheet, comprising an Al—Zn core layer and at least one clad layer, the core layer including the following composition (in weight percent): Zn1.2 to 5.5Mg0.8 to 3.0Mn0.1 to 1.0Cu<0.2Si <0.35Fe<0.5optionally one or more of: Zr<0.3Cr<0.3V<0.3Ti<0.2Hf<0.3Sc<0.5,the balance aluminium and incidental elements and impurities. The clad layer includes an Al—Si based filler alloy and is applied on at least one side of the core layer. The invention relates furthermore to a brazed assembly including such brazing sheet, to the use of such brazing sheet and to method for producing an aluminium alloy brazing sheet.
Owner:ALERIS ALUMINUM KOBLENZ GMBH

High anticrack, wear-resistance, high-cr cast iron cored solder wire for huild-up welding

The present invention relates to a high-anticracking high-chrome cast iron type hardfacing flux-cored welding wire. Its flux core composition includes (by wt%) 43-70% of chromium carbide, 10-25% of ferrovanadium, 1-5% of 75# ferro-silicon, 3-8% of metal manganese, 1-3% of alumino-magnesium alloy, 2-5% of ferro-boron, 2-6% of ferro-titanium, 1-5% of ferro-niobium and 2-8% of ferro-molybdenum.
Owner:BEIJING UNIV OF TECH

High-carbon high-chromium high-niobium cast iron self-protecting flux-cored wire

The invention provides a high-carbon high-chromium high-niobium cast iron self-protection flux-cored wire. The flux-cored wire has a steel belt as an outer skin. The flux core comprises the following components in weight percentage: 10 to 30 percent of ferroniobium, 20 to 30 percent of high carbon ferrochrome, 0.1 to 3 percent of V, 0.2 to 3 percent of W, 0.6 to 0.8 percent of ferromanganese, 0.2 to 0.8 percent of 75 ferrosilicon, 20 to 30 percent of chromium carbide, 5 to 12 percent of graphite, 1 to 10 percent of aluminum-magnesium alloy, 1 to 5 percent of silicon carbide and 1 to 3 percent of ferroboron; and the percentage of a counter weight is between 46 and 54 percent. The high-carbon high-chromium high-niobium cast iron self-protection flux-cored wire has the advantages of high hardness, good wear resistance, good oxidation resistance and strong shock resistance, and is widely applied to grinding rolls and grinding disks of coal grinding machines in thermal power plants and cement plants, material charging equipment in blast furnaces(material charging slots, receiving cones, material storage areas and sieve plates), slag vertical mills, hammer heads and rollers of crushers and sintering equipment workpieces in steel plants.
Owner:CENT RES INST OF BUILDING & CONSTR CO LTD MCC GRP

Iron alloy fusing sample preparation method for X-ray fluorescence spectrum analysis

The invention relates to an iron alloy fusing sample preparation method for X-ray fluorescence spectrum analysis, belonging to the technical field of materialization detection and aiming to solve the problem that fusing a film production alloy sample can erode a platinum crucible. The method comprises the steps of building up wall of the platinum crucible, preparing an oxidizing agent, pre-oxidizing an iron alloy sample and fusing and preparing sample from the iron alloy sample. The invention provides the fusing sample preparation method suitable for various iron alloys such as ferromanganese, silicomanganese, calcium silicon, ferrosilicon, ferromolybdenum, ferrotitanium, cymrite, ferrochrome, ferrocolumbium, ferrovanadium, silicon silicomanganese and the like. By adopting the method, a glass fusing piece can be manufactured without eroding the valuable platinum crucible, the sample can be completely oxidized in the sample preparation process, the sample preparation time is short, the prepared glass fusing piece is uniform and perfect, and the mineral effect and the granularity effect can be completely eliminated. The invention has safe and reliable method, simple and convenient operation and good repeatability, is suitable for various iron alloy samples and widens the application range of the fluorescence analysis.
Owner:HBIS COMPANY LIMITED HANDAN BRANCH COMPANY

Electric welding rod for hand welding X80 grade steel oil, gas transmission pipe

The invention relates to an electric welding rod used for manual welding. The electric welding rod comprises core welding-wires containing the following chemical compositions (wt%): 0.020-0.100 of C, 0.350-0.550 of Mn, 0.015-0.030 of Si, 0.005-0.015 of P, 0.002-0.005 of S, 0.01-0.20 of Cr, 0.01-0.30 of Ni, 0.01-0.20 of Cu, 98.675-99.47 of Fe, and the residue of impurity; the electrode coating comprises the following compositions: 28-38 of marble powder, 16-28 of fluorite powder, 2-8 of feldspar powder, 2-7 of white titanium pigment, 4-8 of electrolytic manganese, 3-7 of ferrosilicon powder, 6-9 of ferrotitanium powder, 0.5-2 of ferromolybdenum powder, 3-8 of nickel powder, 10-25 of iron power and 5-8 of other elements. The chemical compositions, the performance and the structure of the welding seam of a grade X80 steel pipe welded by using the electric welding rod are closer to the pipe body, and without heat treatment, the welding seam can meet the requirements on technical indicators such as high strength, high toughness, low hardness and the like of the grade X80 steel pipe used for oil and natural gas transferring; the electric welding rod overcomes the defaults in the prior art that the welding seam is required to be heat-treated after welding, the quality is poor, and engineering accidents are easy to happen when in use and the like.
Owner:ATLANTIC CHINA WELDING CONSUMABLES +1

Preparation method of wear-resistant high-chromium cast iron

The invention discloses a preparation method of wear-resistant high-chromium cast iron and belongs to the technical field of metal materials. According to the preparation method, common scrap steel, carburant, ferrochromium, ferromolybdenum, copper plates, ferrochromium nitride, ferrosilicon, ferromanganese, ferroboron and aluminum are smelted in an electric furnace so as to form the wear-resistant high-chromium cast iron. The molten wear-resistant high-chromium cast iron comprises the following chemical components in percentage by mass: 3.0-3.5% of C, 18-25% of Cr, 0.3-0.5% of Mn, 0.3-0.5% of Si, 0.18-0.25% of N, 0.5-0.8% of Mo, 0.2-0.4% of B, 0.08-0.12% of Al, 0.5-1.0% of Cu, less than 0.05% of S, less than 0.05% P and the balance of Fe. Molten iron is treated with an inoculator when taken out from the electric furnace, and is treated with a suspending agent when poured, so as to obtain fine solidification structures. Therefore, the wear-resistant high-chromium cast iron has excellent properties.
Owner:BEIJING UNIV OF TECH

High chromium cast iron self protective build-up welding cored welding wire and its usage

InactiveCN1714986ARealize direct surfacingOverlay welding wear-resistant and corrosion-resistantArc welding apparatusWelding/cutting media/materialsHigh carbonManganese
The self-protective high chromium cast iron cored build-up welding wire has metal powder core comprising nickel powder 6-8 wt%, middle carbon manganese iron 8-10 wt%, No. 45 ferrosilicon 9-12 wt%, high carbon ferrochromium 65-75 wt%, metal Cr powder 18-21 wt%, ferromolybdenum 5-7 wt% and Al-Mg powder 1.5-2.5 wt%, and with one welding wire filling amount of 0.49-0.53. The present invention makes it possible to use the welding wire in submerged arc welding without needing added flux and protecting gas, results in raised comprehensive welding performance and raised welding quality, and may be applied widely in build-up welding field requiring high antiwear, anticorrosive and anticracking performance.
Owner:XIANGTAN UNIV

Rare earth improving antibacterial performance silver containing stainless steel

A kind of argental non-corrosive steel which can improve antisepsis with rare-earth is disclosed. It contains 0.05-1.0% rare-earth element, 0.005-0.5% silver, 13-30% Cr, 0-18% Ni, C<=1.2%, Mn<=10%, one or more alloy element of Cu,Mo, Co,Ti,Nb,V,Al,Zr,B, in which Cu<=3.8%, Mo<=3.0%, Al<=1.2%, rest element<=1%, and the allowances are base Fe. The added rare-earth element and silver distributes uniformly in the base, which offers the non-corrosive steel with antisepsis property. Silver is added into the base by middle alloy of Ag-Cu or Ag-Ni. And rare-earth element is added into the base by rare-earth ferro-silicon or by affiliating rare-earth alloy properly in melting anaphase of non-corrosive steel. The non-corrosive steel has many characteristics including persistent antisepsis, extensive range of antisepsis and bacteria without bringing fastness. It also has comparative mechanical property and corrosive nature as common non-corrosive steel.
Owner:ANHUI UNIVERSITY OF TECHNOLOGY

Converting process for converter low-silicon molten iron

ActiveCN101117651AOxygen blowing time shortenedGood foamingManufacturing convertersProcess efficiency improvementMelting tankSlag
The present invention provides a siliconeisen iron melt blowing and refining method in a converter, and the method includes the steps as follows: (1) waste steel and iron melt are loaded into the converter, and oxygen blowing and steel making begin, the oxygen flux is 900Nm3 / min to 1050Nm3 / min, the height that the oxygen gun spraying head departs the metal liquid surface in the melt pond is 1.8-3.0m; (2) a first batch of slag charge is added after oxygen is blown in the first batch of the slag charge is 60-80 percent of the total slag charge, and the rest slag charge can be charged in 2-3 batches after the first batch of the slag charge is melted. The consumption of the slag charge: the lime 18-28kg / t steel, the light calcined dolomite 15-25kg / t steel, the ironstone 5-10kg / t steel, the carbonaceous heat generating agent 0-7kg / t steel, the compound slag 0-6kg / t steel; and the rest process are same as the prior art. The oxygen blowing duration of the present invention decreases 1.8min per furnace averagely, and the problem that the heat quantity is short and the slag forming is difficult can be solved simultaneously, and the present invention can make the converter steel-making to produce efficiently.
Owner:BAOSHAN IRON & STEEL CO LTD +1

Melting process for producing synthetic cast iron by utilizing SiC carburizing siliconizing

The invention discloses a melting process for producing synthetic cast iron by utilizing SiC carburizing siliconizing, which produces the synthetic cast iron by taking scrap steel, pig iron and cast iron returns or scrap steel and cast iron returns as the main raw materials in an induction furnace by utilizing SiC as an carburizing siliconizing agent, wherein the addition of SiC is 0.5-3%, and thegranularity is 6-20mm; SiC is added to a hearth before melting or is added during the melting process, or the two modes cooperate to be used. The invention utilizes SiC to replace the pig iron and silicon iron carburizing siliconizing to reduce the pig iron and silicon iron so as to reduce the cost, and meanwhile, the tendency of the molten iron chill and the reverse chill of the produced synthetic cast iron is small; the dimensions of graphite pebbles in produced nodular cast iron are small, the sphericity or roundness is high, the content of ferrite is high, and the roughness of the nodularcast iron is improved; the organization of produced grey cast iron is refined, and the mechanical property and the abrasion resistance are obviously improved. The invention can be used for producingvarious trademarks of grey cast iron, nodular cast iron and alloy cast iron.
Owner:河南省金太阳精密铸业股份有限公司

High-strength casted air-colled bainite wear-resisting steel and preparing method

The invention relates to a high strength foundry air cooling bainite wear resistant steel that the chemical constituents is 0.32-0.65 C, 0.8-3.0 Si, 1.2-3.0 Mn, 0.5-0.8 Cr, 0.3-0.8 Cu, 0.001-0.008 B, 0.18-0.35 Al, 0.05-0.15 Y, 0.05-0.20 Ti, 0-0.12 Mg, 0-0.12 Ca, 0-0.15 Zn, and 0.10<Mg+Ca+Zn<0.25, the else is Fe and trace impurities. The process includes the following steps: smelting waste steel, pig iron, ferrochrome iron and copper board, adding ferrosilicon and ferromanganese preliminary deoxidation into melting down and alloying; heating to 1600-1660 degree centigrade after adjusting the constituents adding aluminum deoxidatioin and alloying and blast furnace tapping; putting the compounding modification particle of Yt, boron, titanium, magnesium, calcium, and zinc on the bottom of pouring ladle, taking modification process to the molten steel; molding the molten steel after modification process into normal matrix for casting. The invention could prolong the useful life of antifriction component, improve working efficiency, and have good economic benefit.
Owner:CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY

High-grade non-oriented silicon steel with excellent magnetism and smelting method for high-grade non-oriented silicon steel

InactiveCN102796947ADeteriorating purityAvoid NitrogenSlagFerrosilicon
The invention discloses a method for smelting high-grade non-oriented silicon steel with excellent magnetism. The method comprises the following steps of: 1) smelting, namely smelting the following chemical components: less than or equal to 0.005 weight percent of C, 2.6 to 3.4 weight percent of Si, 0.2 to 0.5 weight percent of Mn, less than or equal to 0.2 weight percent of P, less than or equal to 0.005 weight percent of S, 0.3 to 1.6 weight percent of Al, less than or equal to 0.005 weight percent of N, less than or equal to 0.005 weight percent of O, less than or equal to 0.0015 weight percent of Ti, and the balance of Fe and inevitable inclusions, and modifying ladle top slag in the tapping process of a converter so as to ensure that the ladle top slag comprises 30 to 37 weight percent of CaO, 7 to 20 weight percent of SiO2, 35 to 45 weight percent of Al2O3, 5 to 9 weight percent of MgO, and 0.6 to 2.6 weight percent of T.Fe+MnO when the Ruhrstahl-Heraeus (RH) refining treatment begins; 2) performing RH refining, namely deoxidizing by using ferrosilicon when the decarburization of the RH refining is finished, wherein the adding speed of the ferrosilicon is less than or equal to 12.5kg / ton / min; and 3) adding 0.5 to 2.0 kg of calcium alloy into each ton of molten steel for the denaturation control of inclusions after the deoxidization and alloying are performed through the RH refining.
Owner:BAOSHAN IRON & STEEL CO LTD

Composite roll for centrifugally casting high-chromium cast iron and a preparation method thereof

The invention relates to a composite roll for centrifugally casting high-chromium cast iron and a preparation method thereof, belonging to the technical field of the steel rolling. The composite roll comprises a roll external layer and a roll core. The chemical components of the materials of the roll external layer in terms of the percentage by weight are as below: 25-28 of alloy scrap iron of a high-nickel-chromium infinite chilled iron roll, 28-30 of carbon ferrochrome, 1.5-2.5 of mid-carbon ferromanganese, 2.5-3.5 of ferroboron, 0.5-0.8 of silicon-calcium-barium alloy, 0.2-0.4 of aluminum, 0.3-0.5 of ferrotitanium, 0.2-0.4 of rare earth ferrosilicon, 0.10-0.15 of zinc, 0.15-0.18 of magnesium and the balance of low-carbon waste steel sheet. The roll core is high-strength alloy cast iron or low-alloy ductile cast iron. The roll external layer and the roll core are formed through centrifugal composite casting. The roll has low production cost, contains a small number of impurities and has high degree of purity; the hardenability, the mechanical performance and the thermal fatigue of the roll can be improved; and the roll has long service life and low production cost.
Owner:江苏环立板带轧辊有限公司

Abrasion-resisting surfacing flux-cored wire for coal milling roller

The invention relates to an abrasion-resisting surfacing flux-cored wire for a coal milling roller, which is composed of high carbon ferro chrome 45-65%, chromium carbide 8-20%, chromium metal 5-15%, flake graphite 3-8%, high carbon ferromanganese 3-6%, 75# ferrosilicon 5-7%, ferroboron 5-15%, aluminum magnesium alloy 2-5% and an agglutinant 2-8%. The diameter of a welding wire is phi 3.2-phi 4.0mm, welding wire metal is a low carbon steel strip, and 49%-53% of cored powder by mass is filled in the formed low carbon steel strip. No protective gas is additionally arranged outside the flux-cored wire, and the manufacturability is good in the self protection open arc welding. During the welding, the arc is stable, the spatter lose rate is low, molten slag is little, the welding can be continuously performed, the welding joint is attractive in forming, the self-protection effect is good, and no air holes is on the surface of the flux-cored wire. The hardness of the abrasion-resisting surfacing flux-cored wire for the coal milling roller reaches above 62 HRC after multilayer surfacing by metal piling, the evenness of the whole hardness is + / -2HRC, and the performance resistant to abrasion of low-stress grinding materials is good.
Owner:LUOYANG SHUANGRUI SPECIAL ALLOY MATERIALS

High-boron high-speed steel roller material and smelting process thereof

The invention provides a high-boron high-speed steel roller material and a smelting process thereof. The smelting process of the high-boron high-speed steel roller material comprises the following steps: firstly, adopting Q235 waste steel, ferrotungsten, ferromolybdenum, ferrovanadium, high carbon ferro-chrome, metal copper, metal aluminum, calcium-silicon alloy, rare earth ferrosilicon magnesium alloy, ferrocolumbium, ferroboron, ferrosilicon, vanadium-nitrogen alloy, zirconium ferrosilicon and ferrotitanium as materials for smelting low-alloy high-speed molten steel in an electric furnace; then, adding the ferrovanadium and part of ferroboron to carry out alloying in a discharging process; finally, adding part of ferroboron and composite modificator in a casting ladle, adding the vanadium-nitrogen alloy, the zirconium ferrosilicon, the ferrosilicon and part of ferroboron in the casting process. The obtained casting piece has a little alloy elements, excellent abrasive resistance and good thermal fatigue resistance. When the high-boron high-speed steel roller material is used as a roller, the service life is prolonged by more than six times relative to a high nickel-chrome infinite cast-iron roller, and prolonged by 20% relative to a high-vanadium high-speed steel roller. Moreover, the roller is safe to use and reliable.
Owner:YUNNAN HEAVY EQUIP MFG GRP

High-hardness, wearable, self-protecting metal cored surfacing welding wire

The high hardness high wear resistance self-protecting metal core built-up welding filament used in material processing engineering features the metal core comprising chromium carbide 64-77 wt%, 75# ferrosilicon 4-8 wt%, metal Mg 5-10 wt%, Al-Mg alloy 1-3 wt%, ferroborium 2-5 wt%, ferrotitanium 2-6 wt%, ferrocolumbium 1-5 wt% and ferrovanadium 1-8 wt%. Using the filament in welding needs no added protecting gas and produces no welding slag, and this makes it possible to perform continuous welding. Programming the automatic welding machine can perform automatic welding operation in high built-up welding quality. The present invention is used mainly in built-up welding for repairing coal grinding roller, cement grinding disc, chute, etc.
Owner:BEIJING UNIV OF TECH

Preparation method for mu75 magnetic powder core of ferrosilicon aluminum

The invention belongs to the field of preparation of metallic soft magnetic materials, and particularly relates to a preparation method for a mu75 magnetic powder core of soft magnetic ferrosilicon aluminum, which includes steps of smelting, rough smashing, heat treatment, fine smashing, annealing treatment, powder grading, powder insulating, compression molding, secondary heat treatment and coating treatment and requires components, by weight, 9.10% of silicon, 5.95% of aluminum and the rest iron. The preparation is performed with the smelting temperature of 1600 DGE C, the compression molding pressure ranging from 1700MPa to 2000Mpa, magnetic powder core pressing temperature ranging from 600 DEG C to 800 DEG C, and one hour for warm keeping in a nitrogen-oxygen mixed atmosphere. The magnetic powder core mu=75+-6 at 100kHz, the magnetic conductivity mu is smaller than 1% in variation under 1000kHz, the magnetic powder core loss is accordant to Pcv (powder loss) 50kHZ / 50mT<=100Mw / cm3, and the direct-current bias magnetic field is not lower than 70Oe when the magnetic conductivity is reduced to 50%. The preparation method for the mu75 magnetic powder core of soft magnetic ferrosilicon aluminum has the advantages that added binder is solid organic binder, the heat treatment after molding includes keeping warm for one hour in the nitrogen-oxygen mixed atmosphere, and the prepared magnetic powder core is free of pulverization, high in strength and stable in performance and has fine direct current bias characteristics, frequency stability and low loss.
Owner:TDG HLDG CO LTD

Method and device for continuously preparing high-silicon steel ribbon under magnetic field

The invention provides a method and a device for continuously preparing a high-silicon steel ribbon under a magnetic field. The method adopts a composite plating method and comprises the following steps of adding 0.1-3mum of ferrosilicon powder in an iron plating solution, using a low-silicon steel strip as an electrolytic cathode, plating 7.0-99 wt % of thick composite plating layer of Si in the composite electrolytic solution, obtaining uniform 6.5 wt% of high-silicon steel ribbon of the Si after thermal treatment, and carrying out continuous preparation. According to the device provided by the invention, on the basis of the traditional composite plating device, a constant magnetic field of which the magnetic field strength is 0.01-20 T is applied, the low-silicon steel ribbon which is used as a cathode is magnetized through the magnetic field, a stronger gradient field is formed on the surface, ferrosilicon particles in a plating solution are adsorbed to the surface of the cathode of the low-silicon steel strip by utilizing a magnetic field force, thus a high-silicon plating layer can be obtained through a composite iron plating process, and then, the high-performance high-silicon steel ribbon of which the silicon content is up to 6.5 wt% can be prepared through follow-up climate protection thermal treatment. The method and the device, disclosed by the invention, have the advantages that the operation is simple, the low-temperature silicon increasing operation is carried out, the cost is low, and the high-silicon steel ribbons can be continuously prepared.
Owner:SHANGHAI UNIV

Pile-up welding flux-cored wire for restoring cold rolling intermediate roller operational layer and method for manufacturing same

The invention relates to a welding drug core welding wire used to repair the working layer of cold rolling middle roller. Wherein, said welding wire comprises coat and drug core; said drug core comprises medium-carbon ferromanganese at 1.2-1.6%, high carbon ferro-chrome at 6.0-8.0%, ferro-molybdenum at 1.0-3.0%, ferro-vanadium at 0.7-1.5%, ferrocolumbium at 0.06-0.16%, ferrotungsten at 1.0-2.8%, ferrotitanium at 0.05-0.09%, nickel at 0.7-1.2%, silicon iron at 0.80-1.5%, rare-earth at 1.0-5.0%, derbyshire spar at 4.5-10.5%, and the left is iron powder. The invention has simple method, and the rigidity is HRC55-59, without crack.
Owner:PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP +2

A flux-cored wire for soldering diphasic stainless steel

The invention relates to a flux-cored wire for welding duplex stainless steel, and the flux-cored wire is used in the welding field of the material processing technology. During the welding of the duplex stainless steel, joint pitting erosion and impact elasticity can not be met by utilizing austenite stainless steel welding material. The invention provides the flux-cored wire for welding the duplex stainless steel, 17 percent to 24 percent flux-cored powder is filled into stainless steel belt. The invention is characterized in that the mass percent of the components of the flux-cored is as follows: 35 percent to 40 percent of chromium powder, 11 percent to 15 percent of molybdenum powder, 2 percent to 4 percent of nickel powder, 3 percent to 5 percent of manganese powder, 1 percent to 5 percent of magnesia chrome, 1 percent to 3 percent of ferrosilicon, 4 percent to 9 percent of rock crystal, 2 percent to 6 percent of feldspar, 21 percent to 30 percent of rutile, 0.5 percent to 4 percent of Al2O3, 0 percent to 5 percent of zircon, 0.5 percent to 3 percent of Bi2O3, and 0.5 percent to 3 percent of manganese nitride. The invention leads the duplex stainless steel welding joint to have the anti good pitting erosion performance and the good impact elasticity.
Owner:CHANGZHOU XINDE WELDING MATERIAL TECH

Nano micrometer modefied wear resistant erosion resistant thermal coated tubular wire

The present invention relates to surface processing material technology, and especially a kind of nanometer modified wear resistant and erosion resistant arc sprayed wire material. The wire material has coating of Fe or Ni, and powdered core comprising high carbon ferrochrome 45-60 wt%, Ni 10-20 wt%, ferrosilicon 4-10 wt%, ferroboron 5-10 wt%, Cr3C2, TiB2 or TiC 10-15 wt%, micron level TiB2 5-15 wt%, nanometer level Al2O3 5-15 wt%, and optional wollastonite 1-3 wt%, ZrO2 2-5 wt% and TiO2 5-15 wt%. The material is used mainly for coating the surface of blower blade, pipe wall in power station boiler, etc. and the coated layer can increase the surface life of the said parts.
Owner:BEIJING UNIV OF TECH

Surfacing electrode for repairing hot forged mould

The invention discloses a surfacing electrode for repairing a hot forged mould, which uses a low-carbon steel H08A core wire conforming to the GB / T3429 requirement. The solid component quality content of coating is as follows: 30-40% of marble, 12-20% of fluorite, 1.5-3% of zircon sand, 0-2% of soda ash, 2-5% of silicon epitaxy material, 1-3% of titanium white, 0-3% of flogopite, 1-2% of rare earth fluoride, 3-7% of manganese metal, 2-5% of ferrosilicon, 4-6% of ferrotitanium, 4-8% of chromium metal, 4-8% of ferromolybdenum, 6-12% of metallic nickel and 1-2% of aluminium magnesium alloy. The invention has favorable welding rod performance, smooth welding rod surface, high yield and stable eccentricity; electric arc is easy to ignite and is stable to burn; coating is even to melt, a welding line is attractive in shape, and slag is easy to clean; and a deposition metal weld metal buildup has moderate welding state hardness which reaches the requirements of the hot forged mould, thus improving the service life cycle of the hot forged mould.
Owner:LUOYANG SHUANGRUI SPECIAL ALLOY MATERIALS

Welding wire for repairing worn positions of wear-resistant components and manufacturing method thereof

The invention discloses a welding wire for repairing worn positions of wear-resistant components and a manufacturing method of the welding wire. The welding wire is characterized by comprising a shell mild-carbon steel strip and a powder core material, wherein the power core material comprises high-carbon ferrochrome powder, nitrided ferrochrome powder, ferroboron powder, ferrotitanium powder, rare earth ferrosilicon powder, silicon-calcium-barium alloy powder, powder containing sodium substances and power containing potassium substances, and the power core material comprises the alloy powder, by mass, 55-61% of the high-carbon ferrochrome powder, 18-20% of the nitrided ferrochrome powder, 12-15% of the ferroboron powder, 4-5% of the ferrotitanium powder, 1.0-1.5% of the rare earth ferrosilicon powder, 1.0-1.5% of the silicon-calcium-barium alloy powder, 1.0-1.5% of the powder containing sodium substances and 1.5-2.0% of the power containing potassium substances. The ratio of the mass of the powder core material to the total mass of the welding wire is 25-30%. The welding wire has the advantages of being free of expensive alloy elements, low in cost and easy to massively produce.
Owner:BEIJING UNIV OF TECH

Bainite welding rod dedicated for repairing rail and assembled frog

The invention relates to a special bainite weld rod for repairing railway steel rail and assembled frog crossing which is formed by a weld core and a shield, wherein, the weld core is H08A, H08Mn, H08MnA, H08Mn2SiA, or H08Mn2MoA solder wire, and the shield comprises: marble in 30-50%, fluorite in 10-20%, silicon in 5-20%, titanium dioxide in 1-10%, rare-earth ferrosilicon in 2-10%, ferrotitanium in 3-20%, ferromanganese in 5-20%, ferrosilicon in 1-5%, chromium iron in 1-8%, ferro-molybdenum in 0.1-5%, metal nickel in 0.1-5% and soluble glass adhesive in 10-30%. The inventive weld rod has better welding property and application property which can improve the repairing welding, the tenacity and the compactness of repairing layer, increase the crack resistance of welding fusing coat, attain the impact resistance, and prolong the service life of steel rail and frog crossing. And it can be welded without preheating.
Owner:XIHUA UNIV

Ultra supercritical heat-resistant steel welding rod and production method thereof

The invention discloses an ultra supercritical heat-resistant steel welding rod which is composed of an H08A core wire and coating wrapping the surface of the core wire, wherein contents of sulfur, phosphorus, arsenic, aluminum and the like in the H08A core wire are low, and the coating comprises components of 30%-39% of marbles, 22%-30% of fluorites, 6%-9% of rutiles, 7.5%-8.6% of ferromolybdenum, 29%-31% of chromium metal, 5%-9% of silica powder, 2%-5% of ferrosilicon, 1%-1.8% of ferrovanadium, 0.4%-0.8% of ferroniobium, 1.8%-2.8% of nickel powder, 0.4%-0.8% of sodium carbonate, 0.4%-0.8% of carboxyl methyl cellulose (CMC), 0.2%-0.6% of amorphous graphite, 0.6%-1.5% of nitrogen-bearing ferrochromium, 1.6%-3% of electrolytic manganese, 3%-3.8% of cobalt powder and 4%-5% of ferroboron.
Owner:ATLANTIC CHINA WELDING CONSUMABLES

Wear-resistant overlaying flux-cored wire

The invention relates to a wear-resistant overlaying flux-cored wire. The wear-resistant overlaying flux-cored wire comprises a low-carbon steel outer layer and a flux core inner layer, wherein the filling coefficient of a flux core is 45-55 percent, and the overlaying flux-cored wire is characterized in that the flux core comprises the following components in parts by weight: 1-6 parts of microcrystalline graphite, 1-4 parts of aluminum-magnesium alloy, 1-2 parts of fluoride, 1-2 parts of silicate, 1-3 parts of titanate, 1-2 parts of carbonate, 30-80 parts of high carbon ferro-chrome, 15-45 parts of metal chromium carbide, 5-10 parts of electrolytic chromium powder, 3-6 parts of high carbon ferromanganese, 1-4 parts of rare earth ferrosilicon, 2-6 parts of ferrosilicon, 4-10 parts of ferromolybdenum, 5-10 parts of ferrotungsten, 5-10 parts of ferrovanadium, 4-10 parts of ferrocolumbium, 4-10 parts of ferrotitanium and 1-4 parts of ferroboron. The wear-resistant overlaying flux-cored wire has the advantages of good hardness, wear resistance and anti-cracking performance.
Owner:李永锋

Ultra-supercritical novel ferrite heat-resistant steel welding electrode

The invention discloses an ultra-supercritical novel ferrite heat-resistant steel welding electrode, consisting of an H08Cr9WMo special core wire and a coating, wherein the content of each of sulfur, phosphorous, arsenic, stannum and the like in the H08Cr9WMo special core wire is low; the coating is wrapped on the surface of the core wire; and the covering components and the mass contents thereof are as follows: 28-40% of marble, 18-28% of fluorite, 5-10% of rutile, 3-8% of ferrotitanium, 4-10% of silica powder, 2-5% of silicoferrite, 1-1.8% of ferrovanadium, 0.4-0.8% of ferrocolumbium, 1-1.8% of nickel powder, 0.4-0.8% of sodium carbonate, 0.4-0.8% of CMC (Carboxymethyl Cellulose), 0.2-0.6% of amorphous graphite powder, 0.6-1.5% of ferrochrome nitride and 1.5-3% of electrolytic manganese. The welding electrode provided by the invention is used for the welding of ultra-supercritical heat-resistant steel T / P92 in a matching way; and in the course of welding, the electric arc is stable, the splashing is little, the slag detachability is good, the all-position operability is good, the formed welding line is attractive and the welding line wettability is moderate.
Owner:ATLANTIC CHINA WELDING CONSUMABLES

Smelting process for producing low-carbon ultralow-phosphorus steel in converter

The invention discloses a smelting process for producing low-carbon ultralow-phosphorus steel in a converter. The smelting process comprises the following steps of: dephosphorizing molten iron desulfurized once by utilizing two times of slagging blowing process, namely, an early stage and a later, or three times of slagging blowing process, namely, an early stage, a middle stage and the later stage, or multiple times of slagging blowing process, wherein the content of phosphorus of the molten iron is 0.11-0.13%; utilizing silicon iron slag regulation, pouring the slag into a slag basin until the slag basin is full each time and controlling process temperature; pouring slag when oxygen blowing is carried out by 40-45%, wherein the target temperature of an early stage is 1,350-1,400 DEG C; and controlling the temperature between 1530 DEG C and 1550 DEG C when a sublance is used for blowing oxygen for 80%, and pouring the slag, so that the low-carbon ultralow-phosphorus steel with terminal phosphorus content being within 0.005% is obtained, wherein the terminal target temperature is 1560-1580 DEG C. The smelting process for producing the low-carbon ultralow-phosphorus steel in the converter, disclosed by the invention, can carry out multiple times of slagging on the molten iron desulfurized once in the converter and has the advantages of being small in molten iron physical heat loss, high in yield and efficiency, low in alloy consumption and cost, and energy-saving.
Owner:NANJING IRON & STEEL CO LTD
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