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36results about How to "Prevent gestational decline" patented technology
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High-strength high-tenacity cast-state QT700-10 and production method thereof
ActiveCN106811676AIncrease the number ofReduce oxidation burnProcess efficiency improvementHigh intensityDuctile iron
The invention belongs to the field of casting technologies and new materials and particularly relates to a high-strength high-tenacity cast-state QT700-10 and a production method thereof. Compared with ductile iron produced in the prior art, the high-strength high-tenacity cast-state QT700-10 has high strength and a high elongation rate, heat treatment is not needed, heavy metal, such as, Ni and Mo are not added in production, the tensile strength Rm in the cast state is larger than or equal to 700 MPa, the elongation rate A is larger than or equal to 10%, compared with the standard brand QT 450-10, the lowest tensile strength is improved by 55% under the same elongation rate; and compared with the standard brand QT 700-2, the lowest elongation rate is improved by four times under the same tensile strength. The high-strength high-tenacity cast-state QT700-10 can meet requirements of automobile ductile iron castings with high requirements for safety and comprehensive mechanical properties.
Owner:山东汇金股份有限公司
Smelting for ultra-large thick-wall spheroidal cast iron element and on site metamorphism treatment method thereof
The invention relates to a process of melting and field modification treatment of melting ductile iron castings, in particular to a process of melting and field modification treatment of super large ductile iron castings with thick walls, which is characterized in that the invention includes the steps of selecting melting devices, feeding to melt, heat preservation, spheroidization, inoculation and pouring. The processing method of the invention is unique and simple, thereby successfully and effectively resolving the melting of a small-tonnage electric induction furnace on large-tonnage molten iron and the modification treatment of large-tonnage spheroidal graphite cast-iron, which also solves the problems of inner decline of casings with inner walls, graphite segregation of the thick walls and the like.
Owner:KOCEL EQUIP
Inoculant for increasing strength of gray cast iron, preparation method and use method thereof
InactiveCN105039629APromote generationImprove and refine A-type graphiteChemical compositionHigh carbon
The present invention discloses an inoculant for increasing the strength of gray cast iron, a preparation method and a use method thereof, and belongs to the technical field of casting. According to the present invention, nitrogen is adopted as an alloy element so as to significantly refine graphite, change graphite morphology, reduce structure wall thickness sensitivity and significantly increase the pearlite content, such that the tensile strength of the gray cast iron is improved, and especially the significant effects are provided for the high-carbon equivalent gray cast iron or high-carbon gray cast iron; the chemical components of the inoculant comprise, by weight, 25-35% of Si, 10-20% of Mn, 10-20% of Cr, less than 0.1% of C, 1-5% of Ca, 1-6% of Ba, 1-6% of N, less than 0.05% of P, less than 0.02% of S, and the balance of Fe; and for the original hot metal having the same components, compared with the ferrosilicon inoculants, the tensile strength of the gray cast iron can be improved by 30-80 MPa with the inoculant of the present invention.
Owner:濮阳市中壹电子科技有限公司
High-performance magnesium alloy parison continuous casting production line
The invention discloses a high-performance magnesium alloy parison continuous casting production line and relates to the technical fields of vacuum magnesium alloy metallurgy and material preparation. The production line is used for producing high-strength deformation magnesium alloy parison materials by whole-course vacuum protection. Equipment for the production line is provided with two vertical melting furnaces used for melting magnesium medium alloy or working alloy, wherein each melting furnace is divided into the two following parts in space: a hermetic melting chamber and a hermetic furnace body; and the pressure of the furnace body is lower than that of the melting chamber so as to form a vacuum barrier and double vacuum protection melting. Feeding cabins are arranged above furnace covers of the melting furnaces, and the opening and closing of doors of the cabins is matched with the conversion of pressure in the cabins so as to eradicate oxidization and burning of magnesium during feeding materials into hot furnaces. A heat insulation and homogenization furnace is arranged between the two melting furnaces to mix liquid coming from the melting furnaces and prepare magnesium alloy containing target components, and then the heat insulation and homogenization furnace stand still to preserve heat. An inoculation agent and leavening agent flowing addition mechanism is arranged on a gap bridge so as to effectively increase cores and prevent recession. Magnetic stirring is carried out in a crystallization process to control the pressing force and the traction speed of a tractor in real time. The equipment has compact structure, safe production and no pollution.
Owner:武汉镁里镁科技有限公司
Pipe die powder for centrifugally casting nodular cast iron pipe and preparation process thereof
The invention discloses pipe die powder for centrifugally casting a nodular cast iron pipe and a preparation process thereof. The pipe die powder comprises the following components in percent by mass: 60-65 percent of Si, 1.5-2.0 percent of Ca, 2.0-3.0 percent of Ba, 1.4-1.6 percent of Mn, 1.0-1.5 percent of Mg, 1.0-2.0 percent of Zr, 0.7-1.5 percent of Al and the balance of Fe; and the granularities of pipe die powder comprise less than 1.5 percent of 80 mu, 25-30 percent of 100-120 mu, 40-50 percent of 140-180 mu, 25-30 percent of 200-300 mu and less than 2.5 percent of more than 300 mu. The preparation process comprises the following steps of: preparing, melting, pouring, cooling, crushing, milling, proportioning granularities and packaging in vacuum. The pipe die powder has the advantages of uniform components, consistent melting points and reasonable granulometric class, and is beneficial to the prolonging of the service life of a pipe die of the nodular cast iron pipe, the reduction of a series of casting defects of cockles, poor nodulizing, surface cracks and the like of the nodular cast iron pipe, the improvement of the quality of the nodular cast iron pipe and the yield, and the lowering of the production cost.
Owner:YUZHOU HENGLILAI ALLOY CO LTD
Inoculation line formula for gray cast iron feeding and inoculation and production process
InactiveCN111363876AImprove performanceSmall drop in hardnessProcess efficiency improvementChemical compositionFerrosilicon
The invention provides an inoculation line formula for gray cast iron feeding and inoculation and a production process. The inoculation line formula comprises elements: 2.0-2.5% of magnesium, 50-58% of silicon, 1-3% of rare earth, 2.0-3.5% of barium, less than or equal to 1.5% of calcium, less than or equal to 2% of aluminum, and the balance iron. The production process of the inoculation line formula comprises the steps of selecting raw materials including, by mass, 60-65% of steel scraps, 30-35% of recirculated iron and 5-10% of pig iron to be proportioned; smelting and controlling the material compositions; and conducting feeding and inoculation through the inoculation line formula after pre-burying 0.15-0.2% of ferrosilicon to conduct inoculation on molten iron for the first time. Through rational chemical composition control, the actions of all the elements under different environments are given full play to, so that the tensile strength of a produced gray cast iron material is greater than or equal to 330 MPa, and the yield strength is greater than or equal to 220 MPa. As the inoculation line contains rare earth, the inoculation effect is enhanced, inoculation fade is effectively prevented, and inoculation is uniform. After gray cast iron casting through the inoculation line formula, the obtained gray cast iron is excellent in performance, small in hardness drop and highin stability.
Owner:KOCEL EQUIP
Die cavity structure of back box body casing of wind power generating unit and method
ActiveCN106270406AImprove the breeding effectPrevent gestational declineFoundry mouldsFoundry coresMold fillingSlag
The invention discloses a die cavity structure of a back box body casing of a wind power generating unit and a method. The structure comprises a casting system, a back box body die cavity and an air outlet opening, wherein the air outlet opening is formed in the back box body die cavity; the casting system comprises a sprue and a cross pouring gate communicating with the sprue; the cross pouring gate sequentially communicates with a first transition pouring gate, a second transition pouring gate, a third transition pouring gate and a fourth transition pouring gate; the fourth transition pouring gate communicates with the back box body die cavity through a flow gate; a first buffer pouring gate is arranged on the cross pouring gate; the ratio of the cross section area of the first buffer pouring gate to the cross section area of the sprue is 1:(0.60 to0.75). The die cavity structure has the advantages that the iron liquid mold filling instability and turbulence generated by the metal liquid in the casting process can be reduced; the quality stability of the casting can be improved; the slag inclusion defects and air hole defects are reduced; the high-quality requirements can be met.
Owner:RIYUE HEAVY IND
Preparing method and application of nucleating agent for cam shaft
The invention discloses a preparing method of a nucleating agent for a cam shaft. The preparing method comprises the following steps that 60-75% of Si, 0.01-1.0% of Al, 0.05-0.5% of Ca, 0.1-1.0% of Ba, 3-5% of Cr, 0.03-0.05% of V, 5-8% of Nd, 0-1% of Mn, 0.5-1% of carburant and the balance Fe which are evenly mixed are melted, stirred, poured, cooled rapidly and crushed and then are mixed with Fe3O4 powder to be pressed into pellets to be crushed. The invention further discloses specific application of the nucleating agent for the cam shaft. By means of the nucleating agent for the cam shaft, the comprehensive performance of the cam shaft can be improved, and the nucleating efficiency is improved.
Owner:成都宏源铸造材料有限公司
Preparing method and application of gray iron inoculant
The invention discloses a preparing method of gray iron inoculant. The preparing method comprises the following steps that 66-70% of Si, 1-3% of Zr, 1-2% of Ca, 0-2.5% of Mn, 0.5-1.5% of Fe3O4, 0.5-1% of carburant and the balance Fe and inevitable microelements are evenly mixed, smashed, melted, stirred, poured, quickly frozen and smashed for standby use. The invention further discloses application of the gray iron inoculant. By means of the gray iron inoculant, the comprehensive performance of gray iron can be improved, and the inoculating efficiency is improved.
Owner:成都宏源铸造材料有限公司
Preparation method and application of inoculant for nodular cast iron
The preparation method comprises the following steps: uniformly mixing 66-72%% of Si, 3-10% of Ba, 1-2% of Ca, 0.8-1.8% of Al, 1.5-2% of Ce, 0-1% of S, 0.5-1% of a carburant and the balance of Fe and inevitable trace elements to obtain a mixture; smelting, cooling, pouring, quenching and crushing the mixture; mixing the mixture with Fe3O4 powder; and pressing, clustering and crushing the mixture and the Fe3O4 powder. The invention further discloses an application of the inoculant for nodular cast iron. The inoculant for for nodular cast iron provided by the invention can be adopted to improve comprehensive properties of the for nodular cast iron, and improves inoculation efficiency.
Owner:成都宏源铸造材料有限公司
Heatproof alloy vermicular cast iron and method for preparing same
The invention discloses heatproof alloy vermicular cast iron and a method for preparing the same. The vermicular cast iron comprises, by weight, 2.6% to 3.1% of C, 3.4% to 4.5% of Si, 0,20% to 0.40% of Mn, 0.20% to 0.30% of Ni, 0.40% to 0.60% of Mo, 0.5% to 0.8% of Al, 0.05% to 0.08% of Sr, 0.02% to 0.04% of Ca, 0.04% to 0.06% of Mg, 0.03% to 0.05% of Er and the balance being Fe and unavoidable impurities. Smelting and vermiculizing treatment, inoculation and pouring are performed on the materials, wherein the tapping temperature after smelting is in a range between 1450 DEG C to 1550 DEG C, slagging-off pouring is performed to molten iron after in-ladle flushing and along-flow inoculation. Material tissues of the alloy vermicular cast iron are that vermicular graphite with a vermiculizing rate of 5 to 60 is distributed on a ferrite matrix, not only high toughness, heat conductance and high temperature oxidation resistance proprieties are provided, but also good casting process performances are provided, and the cast iron can be used for manufacturing glass molds and light alloy metal casting moulds which bear high temperature forming liquid thermal shock and cold and hot alternate alternating stress for a long time.
Owner:SUZHOU DONGHAI GLASS MOLD
Preparation method and application of gray pig iron nucleating agent
The invention discloses a preparation method of a gray pig iron nucleating agent. The preparation method comprises the following steps that 66%-70% of Si, 1%-13% of Zr, 1%-2% of Ca, 0-2.5% of Mn, 0.5%-1.5% of Fe3O4 and the balance Fe and inevitable trace elements are evenly mixed, smashed, smelted, stirred, cooled and smashed for use. The invention further discloses application of the gray pig iron nucleating agent. According to the gray pig iron nucleating agent, the comprehensive performance of gray pig iron can be improved, and nucleating efficiency is improved.
Owner:成都宏源铸造材料有限公司
Inoculator for large-diameter cylinder jacket
InactiveCN103725948AAddressing Breeding DeclineImprove inclusion morphologyManufacturing engineeringHardness
The invention discloses an inoculator for a large-diameter cylinder jacket, which is prepared from the following raw materials in percentage by mass: 52-58% of Si, 7-8% of Re, 8-10% of Ca, 7-8% of Ba, 1-1.5% of Al and the balance of Fe. The inoculator has the characteristics of high efficiency and long acting; by using the inoculator, the tensile strength of the cylinder jacket body is greater than or equal to 250 MPa, the elongation percentage is greater than or equal to 0.4%, and the hardness is 180-230HB; and meanwhile, the cylinder jacket body can satisfy the technical requirements of customers for cylinder jackets.
Owner:HUDONG HEAVY MACHINERY +1
Molten iron inoculation process for cast iron
The invention provides a molten iron inoculation process for cast iron. A method adopted by molten iron inoculation process comprises the following steps: a dam-type ductile iron ladle is adopted for spheroidization, and an inoculant of which the weight accounts for 0.3-0.5% of that of molten iron is added into the spheroidized ladle; an intermediate ladle is inoculated, that is, the inoculant of which the weight accounts for 0.1-0.3% of that of the molten iron is added into the intermediate ladle, and the treated molten iron is passed into the next step after the inoculant is completely molten; and the molten iron treated in the previous step is added into a pouring ladle, and the inoculant of which the weight accounts for 0.05-0.35% of that of the molten iron is added. According to the molten iron inoculation process, the dam-type ductile iron ladle is adopted for spheroidization, thereby effectively preventing an inoculation fading phenomenon and overcoming a defect of white cast iron; the intermediate ladle is adopted for inoculation, thereby achieving long-acting inoculation of the molten iron; and accordingly, the tensile strength and the product stability can be improved, and the requirements for several high-hardness machinery castings can be met.
Owner:TIANJIN ZHONGDA PRECISION MACHINERY
High-strength and high-toughness thick-wall nodular cast iron material and casting method thereof
The invention provides a high-strength and high-toughness thick-wall nodular cast iron material and a casting method thereof. Raw iron liquid of the material comprises, by mass, 3.5%-3.8% of C, 0.3%-0.60% of Si, smaller than 0.4% of Mn, smaller than 0.06% of P, smaller than 0.05% of S, 0.4%-0.7% of Cr and the balance Fe and inevitable impurities. The casting material subjected to spheroidizing inoculation comprises the following chemical components in percentage by mass: 3.5%-3.8% of C, 1.6%-2.2% of Si, less than 0.4% of Mn, less than 0.06% of P, less than 0.05% of S, 0.4%-0.7% of Cr, 0.5%-0.8% of Cu, 0.04%-0.06% of Mg and 0.01%-0.04% of RE. The casting method comprises the following steps of melting raw materials into molten iron, preparing a nodulizing agent, a nucleating agent, a deslagging agent and Cu in a casting ladle, then discharging, treating the molten iron by adopting a pouring method and a flow following mode, casting after slagging off, and finally carrying out normalizing and tempering heat treatment to obtain the high-strength and high-toughness thick-wall nodular cast iron material, wherein the wall thickness of the material is greater than 100mm, the tensile strength is greater than or equal to 1000MPA, the elongation is greater than or equal to 4%, and the HBW is greater than or equal to 300.
Owner:YICHANG MARINE DIESEL ENGINE
Molding and casting method for automobile cylinder cover with high air-tightness
InactiveCN103203427AImprove air tightnessTo promote floatingFoundry mouldsFoundry coresSlagAir tightness
The invention discloses a molding and casting method for an automobile cylinder cover with high air-tightness. According to the invention, a lost foam casting process is employed, and when molten metal is being cast into lost foam, the molten metal is subjected to mechanical vibration until the molten metal is completely solidified. The manner of mechanical vibration casting is utilized in production of a cylinder cover cast, and such a manner enables crystal grains to be refined, a compact structure to be obtained and air-tightness of the cylinder cover to be improved; gas and inclusions in the molten metal are allowed to float up to improve the quality of molten iron; a composite covering agent is used to remove inclusions and gas in the molten iron, so metallurgical quality of the molten iron is improved, inoculation fade of the molten iron is prevented while heat insulation and slag collection are realized, a good inoculation effect is obtained, and processing properties and mechanical properties of the cylinder cover are improved; meanwhile, a fine powder inoculant turns into the valuable from the waste, which accords with policies of circular economy and low carbon economy.
Owner:贵州英吉尔机械制造有限公司
Production method capable of eliminating shrinkage cavities and shrinkage porosity for light calliper body castings
ActiveCN107058858AReduce scrap rateLow costFoundry mouldsFoundry coresCompensation effectCastability
The invention discloses a production method capable of eliminating shrinkage cavities and shrinkage porosity for light calliper body castings. An adjusting iron solution is prepared from, by mass, 3.7%-3.9% of C, 1.9%-2.1% of Si, 0.2%-0.4% of Mn, smaller than or equal to 0.02% of S, smaller than or equal to 0.02% of P and the balance Fe. According to the production method, the carbon content in molten iron is increased by adding a graphitized carburant, and the silicon content in the molten iron is decreased by decreasing the addition amount of silicon iron; a strong inoculant is adopted for secondary inoculation, fast pouring is conducted for avoiding inoculation fade, carbon and high silicon in the molten iron are low, the content of phosphorus is also controlled to be low, good fluidity of the molten iron is guaranteed, castability is good, molten iron expansion is small, the strong inoculant promotes graphitization, automatic shrinkage compensation performance is good, the overall shrinkage compensation effect is good, and the weight of the calliper body castings is decreased; and meanwhile, hot-spot portions of the casting can be prevented from being subjected to shrinkage cavities and shrinkage cavity, the rejection rate of the castings is decreased, and the production cost of the castings is reduced.
Owner:黄石东贝铸造有限公司
Composite covering agent and use method thereof in production of cylinder cover casting
The invention discloses a composite covering agent and a use method thereof in the production of a cylinder cover casting. The composite covering agent consists of a composite covering agent I and a composite covering agent II, wherein the composite covering agent I consists of the following components in parts by mass: 80-90 parts of SiC, 5-6 parts of recarbonizer and 5-15 parts of perlite; and the composite covering agent II consists of the components in parts by mass: 35-45 parts of inoculant and 55-65 parts of perlite. In the invention, the composite covering agents are adopted in the production of the cylinder cover casting to remove impurities and gas out of iron liquid so as to improve the metallurgical quality of the iron liquid; when heat preservation and collecting residues are carried out, the inoculation fade of the iron liquid is prevented, a favorable inoculation effect is obtained, thereby processing properties and mechanical properties of the cylinder cover are improved; meanwhile, a fine powder inoculant is turned into valuable materials and complies with the policies of recycling economy and low carbon economy. The invention has simple prescription, wide source materials which are easily obtained, simple use method, easy implementation, low production cost and favorable use effect.
Owner:贵州英吉尔机械制造有限公司
Roller and preparation method of roller
ActiveCN109702175AReduce coefficient of frictionImprove quality assurance capabilitiesRollsMetal rolling arrangementsFerrosiliconRare earth
The invention provides a roller and a preparation method of the roller. The preparation method of the roller comprises the following steps of: firstly, smelting molten iron with qualified ingredientsof the outer layer of the roller, then heating to 1500 to 1550 DEG C, keeping the temperature for 30 minutes; pre-adding a silicon-zirconium alloy and a rare earth ferrosilicon alloy at the bottom ofa ladle; when the temperature of the molten iron drops to 1390 to 1420 DEG C, discharging the molten iron from a furnace into the ladle, and slagging off after discharging from the furnace; when the temperature of the molten iron drops to 1350 plus / minus 5 DEG C, adding a ferrosilicon alloy to the molten iron, and stirring until fully melting; preparing a funnel in advance at a pouring position, and preloading ferrosilicon particles in the funnel; and when the temperature of the molten iron drops to 1330 plus / minus 5 DEG C, transferring the ladle o the pouring position for pouring, and meanwhile uniformly introducing the ferrosilicon particles into a cavity along with the poured molten iron. The preparation method of the roller can improve the uniformity of an outer layer structure of theroller, and enables a working layer of the roller to better maintain the consistency of the structures in different thickness ranges. The roller has small hardness drop, high wear resistance and strong holding capacity of roller surface precision.
Owner:XINGTAI DELONG MACHINERY & MILL ROLL CO LTD
A trace alloying process of nodular cast iron
The invention relates to a trace alloying process of ductile iron. The trace alloying process of the ductile iron comprises the following steps of a step of spheroidizing, primary inoculation treatment and feed wire method trace alloying and a step of secondary inoculation treatment and poured-over method trace alloying. With adoption of the trace alloying process of the ductile iron, the strength and the plasticity of the produced ductile iron are obviously improved, the tensile strength is larger than 750MPa, the yield strength is about 560MPa, and the percentage elongation after fracture is above 7.5 percent.
Owner:湖南金龙智造科技股份有限公司
A kind of inoculation treatment method of cast iron
The invention discloses an inoculation treatment method of cast iron, which comprises the following steps: directly pouring molten iron without inoculation treatment into a pouring furnace; The second inoculant is added to the water outlet end through the flow inoculation device to carry out the second inoculation treatment. By adopting the inoculation treatment method of the present invention, the inoculation effect of molten iron is good and the production cost is low.
Owner:GUANGDONG FUHUA CASTING
Pipe die powder for centrifugally casting nodular cast iron pipe and preparation process thereof
The invention discloses pipe die powder for centrifugally casting a nodular cast iron pipe and a preparation process thereof. The pipe die powder comprises the following components in percent by mass: 60-65 percent of Si, 1.5-2.0 percent of Ca, 2.0-3.0 percent of Ba, 1.4-1.6 percent of Mn, 1.0-1.5 percent of Mg, 1.0-2.0 percent of Zr, 0.7-1.5 percent of Al and the balance of Fe; and the granularities of pipe die powder comprise less than 1.5 percent of 80 mu, 25-30 percent of 100-120 mu, 40-50 percent of 140-180 mu, 25-30 percent of 200-300 mu and less than 2.5 percent of more than 300 mu. The preparation process comprises the following steps of: preparing, melting, pouring, cooling, crushing, milling, proportioning granularities and packaging in vacuum. The pipe die powder has the advantages of uniform components, consistent melting points and reasonable granulometric class, and is beneficial to the prolonging of the service life of a pipe die of the nodular cast iron pipe, the reduction of a series of casting defects of cockles, poor nodulizing, surface cracks and the like of the nodular cast iron pipe, the improvement of the quality of the nodular cast iron pipe and the yield, and the lowering of the production cost.
Owner:YUZHOU HENGLILAI ALLOY CO LTD
Cavity structure and method of wind turbine rear box casting
ActiveCN106270406BImprove the breeding effectPrevent gestational declineFoundry mouldsFoundry coresMold fillingSlag
The invention discloses a die cavity structure of a back box body casing of a wind power generating unit and a method. The structure comprises a casting system, a back box body die cavity and an air outlet opening, wherein the air outlet opening is formed in the back box body die cavity; the casting system comprises a sprue and a cross pouring gate communicating with the sprue; the cross pouring gate sequentially communicates with a first transition pouring gate, a second transition pouring gate, a third transition pouring gate and a fourth transition pouring gate; the fourth transition pouring gate communicates with the back box body die cavity through a flow gate; a first buffer pouring gate is arranged on the cross pouring gate; the ratio of the cross section area of the first buffer pouring gate to the cross section area of the sprue is 1:(0.60 to0.75). The die cavity structure has the advantages that the iron liquid mold filling instability and turbulence generated by the metal liquid in the casting process can be reduced; the quality stability of the casting can be improved; the slag inclusion defects and air hole defects are reduced; the high-quality requirements can be met.
Owner:RIYUE HEAVY IND
Oxidation-resistant alloying grey cast iron and preparation method thereof
The invention discloses an oxidation-resistant alloying grey cast iron and a preparation method of the oxidation-resistant alloying grey cast iron. The cast iron comprises the following components by mass percentage: 3.0-3.2% of C, 1.8-2.0% of Si, 0.50-0.70% of Mn, 0.10-0.50% of Cr, 0.20-0.30% of Ni, 0.03-0.50% of Mo, 0.5-3.0% of Al, 0.05-0.08% of Sr, 0.005-0.15% of Zn, and the balance of Fe and inevitable impurities. The preparation method comprises the steps of melting raw materials, culturing and processing, and pouring, wherein the tapping is carried out at 1450 to 1550 DEG C after melting; the molten iron is processed by being flushed in a ladle and cultured and processed along with the flow, and then slagged and casted. According to the oxidation-resistant alloying grey cast iron provided by the invention, the organization of the grey alloying cast iron material is structured by distributing 6-8 grades of D type graphite with little graphite of A type on a ferrite substrate, so that higher toughness, high heat conductivity and high-temperature oxidization resistance can be achieved, and good casting technical performance can be ensured as well; and the oxidation-resistant alloying grey cast iron can be applied to manufacturing a glass die and a light alloy metal type casting die which can bear the heat impacting of high-temperature formed liquid and cold-heat alternating stress for a long time.
Owner:SUZHOU DONGHAI GLASS MOLD
A kind of high-strength and high-toughness cast qt700-10 and its production method
ActiveCN106811676BIncrease the number ofReduce oxidation burnProcess efficiency improvementHigh intensityDuctile iron
The invention belongs to the field of casting technologies and new materials and particularly relates to a high-strength high-tenacity cast-state QT700-10 and a production method thereof. Compared with ductile iron produced in the prior art, the high-strength high-tenacity cast-state QT700-10 has high strength and a high elongation rate, heat treatment is not needed, heavy metal, such as, Ni and Mo are not added in production, the tensile strength Rm in the cast state is larger than or equal to 700 MPa, the elongation rate A is larger than or equal to 10%, compared with the standard brand QT 450-10, the lowest tensile strength is improved by 55% under the same elongation rate; and compared with the standard brand QT 700-2, the lowest elongation rate is improved by four times under the same tensile strength. The high-strength high-tenacity cast-state QT700-10 can meet requirements of automobile ductile iron castings with high requirements for safety and comprehensive mechanical properties.
Owner:山东汇金股份有限公司
A kind of preparation method and application of inoculant for camshaft
Owner:成都宏源铸造材料有限公司
A production method of light-weight caliper body casting capable of eliminating shrinkage cavity and shrinkage porosity
ActiveCN107058858BReduce scrap rateLow costFoundry mouldsFoundry coresCompensation effectCastability
The invention discloses a production method capable of eliminating shrinkage cavities and shrinkage porosity for light calliper body castings. An adjusting iron solution is prepared from, by mass, 3.7%-3.9% of C, 1.9%-2.1% of Si, 0.2%-0.4% of Mn, smaller than or equal to 0.02% of S, smaller than or equal to 0.02% of P and the balance Fe. According to the production method, the carbon content in molten iron is increased by adding a graphitized carburant, and the silicon content in the molten iron is decreased by decreasing the addition amount of silicon iron; a strong inoculant is adopted for secondary inoculation, fast pouring is conducted for avoiding inoculation fade, carbon and high silicon in the molten iron are low, the content of phosphorus is also controlled to be low, good fluidity of the molten iron is guaranteed, castability is good, molten iron expansion is small, the strong inoculant promotes graphitization, automatic shrinkage compensation performance is good, the overall shrinkage compensation effect is good, and the weight of the calliper body castings is decreased; and meanwhile, hot-spot portions of the casting can be prevented from being subjected to shrinkage cavities and shrinkage cavity, the rejection rate of the castings is decreased, and the production cost of the castings is reduced.
Owner:黄石东贝铸造有限公司
Synthesis and preparation process of a kind of high silicon molybdenum nodular iron material
Owner:KOCEL EQUIP
High carbon brake disc proportion and production process thereof
The invention relates to the field of brake discs, and discloses a production process of a high carbon brake disc. The production process comprises the following steps: step I: adding a carburant intoa furnace; step II: adding molten iron, and adding the carburant of the same quantity with that in step I into the molten iron; step III: adding a pretreatment agent; step IV: adding alloy, heating,so that the temperature of the molten iron reaches 1450 DEG C; step V: sampling and checking the original molten iron; step VI: discharging at the temperature 1540 plus or minus 10 DEG C; step VII: adding a silicon-barium-calcium nucleating agent into a molten iron furnace (1); and step VIII: pouring the molten iron into the molten iron furnace (1), and nucleating by adopting silicon-barium nucleating agent. By virtue of the comparison of experiments, the high carbon brake disc proportion and the process with high performance can be obtained, and the tensile strength and hardness are excellent; and in addition, by designing the molten iron furnace, the nucleating agent is more uniformly sprayed, the time for adding the nucleating agent is retarded, pregnancy recession is avoided, the adding flow rate of the nucleating agent is controlled, the clustering of the nucleating agent is prevented, and the nucleating effect is improved.
Owner:金华浩翔汽配有限公司
A preparation method and system for controlling the eutectic degree of molten iron to optimize casting shrinkage cavity
ActiveCN110253005BIncreased eutecticityImprove process yieldMolten metal pouring equipmentsSolidusTemperature curve
Owner:漳州海力机械制造有限公司
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