38results about How to "Good tissue density" patented technology

The invention relates to a casting method of a main reducer housing. The casting method includes: a precoated sand core forming process, a smelting ball iron process and a casting process, the precoated sand core forming process includes core-making of precoated sand, coated sand type assembly and sand-type steel shot filling; the smelting ball iron process includes electric-furnace smelting and charging of molten iron and treatment; the casting method is characterized by including casting, unboxing, de-gating, one-step shot blasting, grinding, secondary shot blasting and detecting. With the method, exhaust smoothness is guaranteed, generation of hole defects in the casting is avoided from the sand core exhaust process, sand hole and pore defective reject rate is controlled within 1%, shrinkage or porosity defect is avoided, the casting is stable in size and high in surface smoothness, the yield is higher as compared with that with a traditional casting method of the main reducer housing, the production process is easier to control, and production competitiveness has higher advantages.

The invention belongs to the technical field of thermal-sprayed coating layers and relates to a composite functional coating layer capable of resisting abrasion and corrosion. The coating layer consists of the chemical components such as NiCrAlY alloy powder, metallurgical TiC powder and rare-earth oxide La2O3 powder, wherein the adding amount of the NiCrAlY alloy powder accounts for 49.5-80 percent of the weight of the powder of the whole coating layer; the adding amount of the metallurgical TiC powder accounts for 19.5-50 percent of the weight of the materials of the coating layer; the adding amount of the rare-earth oxide La2O3 powder accounts for 0.5-5 percent of the weight of the materials of the coating layer. Metallurgical combination is realized, so that the bonding strength of the coating layer is high, and organization is compact; therefore, compared with the common coating layer, the coating layer has the advantages that the abrasion resistance and the corrosion resistance are greatly improved. The coating layer disclosed by the invention is processed by a plasma composite spraying technology such as laser and atmosphere instead of an independent thermal spraying technology; in order to fulfill the aim of realizing coating layer metallurgical combination, due to the metallurgical combination, the coating layer combining strength can be improved, and the high compactness of the organization of the coating layer is realized; due to the high combining strength and the low porosity, the coating layer is long in service life and high in abrasion resistance and corrosion resistance.

The invention discloses an integrated manufacturing method for a high-temperature-resistant thin-wall component by laying metal foil strips for blank making. The method comprises the steps of designing a prefabricated blank; preparing a supporting mold; determining the thickness of the foil strips; determining the width of the foil strips; formulating a laying process; laying the foil strips A andthe foil strips B; preparing the AB laminated prefabricated blank; performing bulging forming on the prefabricated blank; performing reaction synthesis and densification treatment on the bulged component; performing subsequent treatment on the thin-walled component and the like. According to the method, the thin-wall integrally-prefabricated blank which is complex in structure, uniform in wall thickness and similar to a final part in shape can be obtained by continuously laying the metal foil strips with proper widths, the thin-wall prefabricated blank does not need to be welded, the problemthat the comprehensive performance of a welding area is weak when a laminated plate blank is firstly prepared and then roll-welded into a cylinder blank at present is solved, meanwhile, the deformation during subsequent bulging is reduced, and the defects of local bulging, thinning and cracking, undercut at the parting position in the mold closing process or wrinkling caused by uneven distributionof materials in all areas are avoided.

A method for casting a box-type complex water-cooling exhaust pipe by using an iron mold coated sand is disclosed. By using the water-free coated sand mold, the method helps to realize rapid cooling and mold filling, eliminate the defects of nail-passing-hole structure loosening and casting deformation often happening in the water-cooling exhaust pipe; and the prepared water-cooling exhaust pipe has higher tensile strength, higher hardness, better graphite morphology and better graphite grade, and the amount of stable pearlites is 98% or more. The yield of castings is improved from 54% to 96% or more. The finished product is good in texture compactness, good in texture refining capability, good in surface quality, and stable and reliable in quality. Also, during the production, the method has the advantages of being small in use level of the sand and paints, small in equipment investment, small in equipment occupied area, high in production efficiency, low in manufacture cost, good in environmental protection property, wide in prospect, and applicable to production of various engine exhaust pipes with high quality demands and complex thin-wall double-layer walls.

The disclosed preparation method for self-lubricating alloy material comprises mainly: adjusting the sulfur content to improve product optimal lubrication effect, adding other alloy elements to reinforce ferrite. This product has strong wear-resist capacity to prolong its lifetime, and can also be prepared by powder metallurgy sintering with low cost.

The present invention discloses forming process of large conic roller blank, and belongs to the field of cold extrusion forming technology. The forming process includes the steps of: cutting the metal rod into the material sections in required size, external grinding to required size, extruding in an extruder at pressure of 200-800 tons, and pushing out the extruded large conic roller blank. The forming process is superior to turning process, and has high steel material utilization rate, high production efficiency, improved material structure and other advantages.

The invention relates to a highly turbocharged low pressure die casting machine, comprising a pouring layer (1), a thermal insulation layer (2), a case (3), a heating rod (4) and air inlet / exhaust holes (5), wherein the upper part of the hearth is provided with the heating rod (4), the lower part is provided with the pouring layer (1) and the thermal insulation layer (2). The highly turbocharged low pressure die casting machine is characterized in that the two sides of the upper part of the hearth are provided with the air inlet / exhaust holes (5). In the structure in the invention, the pouring layer is directly contacted and sealed with the case of a furnace in a filling way, thus high pressure gas can not enter into the thermal insulation layer and the pouring layer is protected. The air inlet / exhaust holes are arranged in heating tanks at the two sides, air is introduced / exhausted at the two sides simultaneously, the speed for introducing / exhausting the air can meet the requirement of mould filling during high pressure casting, structure compactness of a casting is good, and the strength and elongation percentage can meet product requirements.

The invention discloses a titanium microalloying high-silicon-content aluminum alloy and a preparing method thereof. The aluminum alloy comprises, by mass percent, 11.0%-14.0% of Si, 0.2%-0.7% of Mg, smaller than or equal to 0.15% of Fe, 0.015%-0.04% of Sr, 0.01%-0.03% of B, 0.05%-0.25% of Ti and the balance aluminum. The preparing method includes the steps that an aluminum-silicon intermediate alloy, a magnesium element, a silicon element and a titanium element are heated and melted, hexachloroethane is added for refining when melt is heated to 720 DEG C to 740 DEG C, Al-Sr and Al-B intermediate alloys are added for metamorphism treatment and grain refining treatment after standing is conducted, heat preservation is conducted for 30 min, vacuum standing is conducted for 30 min to 60 min, the mixture is heated to 710 DEG C to 730 DEG C and poured into a die, and a cast ingot is obtained; annealing is conducted for 3 h to 6 h under the temperature ranging from 520 DEG C to 540 DEG C; and hot extrusion or hot rolling deformation is conducted under the temperature ranging from 400 DEG C to 500 DEG C.

The invention provides an improved die casting forming method. The improved die casting forming method comprises the following steps that S1, smelting is conducted, wherein an aluminum alloy materialis put into a heating furnace to be continuously heated to obtain molten liquid, then compressed argon or compressed nitrogen serves as a carrier, strengthening particles are evenly added into the molten liquid, slag is removed, and standing is conducted to obtain a first melt; S2, stirring is conducted, wherein the first melt is stirred electromagnetically to obtain a cast ingot; S3, smelting isconducted again, wherein the cast ingot is cut into blanks and re-heated to obtain a second melt; S4, mold treatment is conducted, wherein a mold is preheated and subjected to heat preservation for 1h; S5, die casting is conducted, wherein the second melt is transferred into a holding furnace of a low-pressure casting machine for heat preservation, then the second melt is die-cast into a mold cavity under the low-pressure condition, and a die casting is obtained; and S6, heat treatment is conducted, wherein the obtained die casting is subjected to a heat treatment process including solution treatment and incomplete artificial aging. An aluminum alloy product obtained through the method is compact in structure, good in comprehensive mechanical property and physicochemical property, high inmaterial utilization rate and low in cost.

The invention relates to a preparation method of a high performance magnesium-based composite material component. In order to solve the problems that graphene as a reinforcing body is poor in wettability to a magnesium matrix and is easy to agglomerate to lead to a bad interface reaction easily, the preparation process is complex and is hard to control and the like, a high performance magnesium-based composite material component is prepared by the following steps of carrying out surface treatment on a magnesium alloy panel, spraying carboxylated graphene to the surface of the magnesium alloy panel after surface treatment, carrying out hot pressed sintering, crushing the magnesium alloy panel into magnesium alloy particles and carrying out semi-solid state indirect squeeze casting forming by taking carboxylated graphene as the reinforcing body of the magnesium-based composite material. The preparation method is advanced in process and detailed and accurate in data, and the prepared magnesium-based composite material component is free of shrinkage cavity and shrinkage porosity defect inside, good in tissue compactness, fine in grain, spherical and approximately spherical. The carboxylated graphene is uniformly dispersed in the matrix and good in interfacial adhesion. The tensile strength of the component reaches 335 Mpa, the ductility reaches 5.6% and the hardness reaches 102HV,and the preparation method is the advanced preparation method of the high performance magnesium-based composite material component.

The invention provides pressure casting equipment with an organ type radiating pressure casting die. The organ type radiating pressure casting die comprises a die support structure, a cooling assembly, a casting side edge core drawing mechanism formed by a sliding block compression block, a sliding block body and an inclined guide column and a gating system assembly; the die is arranged in a one-die one-cavity mode, cooling components of molding pieces achieve even cooling of a casting and a runner, even cooling of the casting in a die cavity is guaranteed, and the problems about casting looseness, cold isolation and the like are solved; an ejection mechanism component solves the problems about ejection and demolding difficulties in die cavities of the front and back dies of the casting, and automatic demolding of the casting is achieved; and a gating system is provided with an organ type air exhaust component, the problem about insufficient casting melted liquid flowing is solved, smooth flowing of casting melted liquid is achieved, the balance and the compactness of the casting texture are guaranteed, and the molding quality of the casting is guaranteed; and the die is simple instructure, reliable in mechanism motion and convenient to assemble and maintain.

The invention relates to a preparation method of a high beryllium copper alloy strip material short process for a dynode of a photomultiplier, and relates to a preparation method of the beryllium copper alloy strip. The problems that the mass fraction of beryllium in an existing beryllium copper strip is low, the porosity of a beryllium copper strip is large, the compactness of a structure is poor, macroscopic segregation is generated and production efficiency is low are solved; the method comprises the following steps that 1, semi-continuous preparation is carried out to prepare a blank; 2, extrusion is carried out; 3, rolling and acid pickling are carried out; and 4, finish rolling, annealing and winding are carried out to obtain the high beryllium copper alloy strip for the dynode of the photomultiplier. According to the method, a peak secondary electron emission coefficient of the high beryllium copper alloy strip for the dynode of the photomultiplier prepared by the method is 8.4-10.8, the tensile strength is 645.4 MPa-670.2 MPa, the yield strength ranges from 314.8 MPa-360.9 MPa, and the percentage elongation after fracture is 15%-19%; and the high beryllium copper alloy strip for the dynode of the photomultiplier can be obtained.

The invention provides a forming and control integration method of NiAl alloy thin-walled pipe fittings, which belongs to the technical field of precision forming of intermetallic compound thin-walled pipe fittings. In the present invention, Ni foil and Al foil are laminated alternately and coiled to obtain a Ni / Al laminated foil tube; the Ni / Al laminated foil tube is subjected to plastic forming, reaction synthesis and densification treatment in an inflation forming mold to obtain a NiAl alloy Thin wall pipe fittings. The invention solves the problems of difficult material flow, microstructure and performance control and complicated procedures in the preparation of the existing NiAl alloy slab and thin-walled pipe fittings formed from the slab. The data of the examples show that the NiAl alloy thin-walled pipe fittings obtained by the method of the present invention have high forming rate, high dimensional accuracy, uniform distribution of components, good compactness of the pipe fittings, and no defects on the surface.

The invention relates to a self-lubricating alloy material, which is characterized by comprising rare earth elements; the chemical compositions (weight percentage) are as follows: 5 to 15 percent of iron, 10 to 20 percent of chromium, 1 to 8 percent of molybdenum, 2 to 6 percent of niobium, 1 to 4 percent of cobalt, 0.03 to 0.1 percent of boron, 1 to 5 percent of tungsten, 1 to 5 percent of sulfur, 1 to 2 percent of silicon, 0.01 to 0.20 percent of cerium and the balance of nickel. The invention adds the rare earth elements and other alloy elements, strengthens ferrite, improves heat resistance of the material, has good structural compactness and self-lubricity, strong abrasion resistance and wide range of applicable temperature and leads the service life thereof to be prolonged greatly.

The invention relates to a chiller for a casting process, and in particular relates to a direct cooling chiller for casting gray cast iron castings and ductile iron castings. The direct cooling chiller is characterized by being made of common carbon steel, and is also characterized in that an anti-falling clamping groove structure is arranged on the outer surface of the direct cooling chiller; two end surfaces of the direct cooling chiller are used as working surfaces; a groove with the width of 15mm and the angle of 120 degrees is formed in the middle of the chiller. The chiller is made of a unique material, the utilization rate of a steel chiller is improved, the service life of the chiller is prolonged, the risk cost loss, caused by repair and defect treatment, of a customer in the machining process is reduced, and the chiller is easy to machine and manufacture.

The invention discloses a deoxidizer which comprises the following components in percentage by weight: 46-48% of silicon, 14-16% of barium, 6-8% of calcium, 6-7.5% of rare earth metal, 6-7% of aluminum and balance of iron. The deoxidizer of the invention has good effect on sulphur removal, deoxidation and degasification and can be used for deoxidizing for stainless steel. The molten casting has good tissue compactness and can not leak water easily, and the mechanical strength and the corrosion resistance are greatly improved.

The invention discloses a method for forming a large blank tapered roller, which belongs to the cold extrusion forming process. The specific process is as follows: firstly, the metal bar is cut into material sections of required specifications; the outer circle of the material section is ground and smoothed to The required outer diameter size; put the above-mentioned smooth material section after grinding into the upper and lower molds; place the upper and lower molds in the extrusion equipment for extrusion, and control the pressure at 200-800 tons; remove the upper mold, and use The positioning rod (cutting material) rod is extended from the lower die hole to eject the extruded large tapered roller blank, and finally the flash on the blank is removed before finishing to obtain the large tapered roller. This process solves the problems of low steel utilization rate, low production efficiency, and more equipment and production labor in the turning forming process, which is conducive to improving the processing efficiency and precision of the previous process of the roller, and can also moderately improve the compactness of the roller. Sex, and avoid problems such as cracking when the deformation is large.

The invention discloses an integrated manufacturing method of a high-temperature-resistant thin-walled component by laying metal foil strips, including designing a prefabricated blank, preparing a supporting mold, determining the thickness of the foil strip, determining the width of the foil strip, and formulating a laying process Steps such as laying A foil strip and B foil strip, preparing AB laminated prefabricated blank, bulging forming of prefabricated blank, reaction synthesis and densification treatment of components after bulging, and subsequent treatment of thin-walled components; the present invention adopts appropriate The continuous laying of wide metal foil strips can obtain thin-walled integral prefabricated blanks with complex structure, uniform wall thickness, and shape close to the final part. There is no need to weld thin-walled prefabricated blanks, which solves the traditional problem of first preparing laminated slabs and then rolling welding There is a problem of weak comprehensive performance in the welding area when the billet is formed, and at the same time reduce the amount of deformation during the subsequent bulging, avoiding local bulging thinning and cracking, or undercutting at the parting part during the mold closing process, or uneven distribution of materials in each area Wrinkle defects appear.

The invention belongs to the technical field of thermal-sprayed coating layers and relates to a composite functional coating layer capable of resisting abrasion and corrosion. The coating layer consists of the chemical components such as NiCrAlY alloy powder, metallurgical TiC powder and rare-earth oxide La2O3 powder, wherein the adding amount of the NiCrAlY alloy powder accounts for 49.5-80 percent of the weight of the powder of the whole coating layer; the adding amount of the metallurgical TiC powder accounts for 19.5-50 percent of the weight of the materials of the coating layer; the adding amount of the rare-earth oxide La2O3 powder accounts for 0.5-5 percent of the weight of the materials of the coating layer. Metallurgical combination is realized, so that the bonding strength of the coating layer is high, and organization is compact; therefore, compared with the common coating layer, the coating layer has the advantages that the abrasion resistance and the corrosion resistance are greatly improved. The coating layer disclosed by the invention is processed by a plasma composite spraying technology such as laser and atmosphere instead of an independent thermal spraying technology; in order to fulfill the aim of realizing coating layer metallurgical combination, due to the metallurgical combination, the coating layer combining strength can be improved, and the high compactness of the organization of the coating layer is realized; due to the high combining strength and the low porosity, the coating layer is long in service life and high in abrasion resistance and corrosion resistance.

The invention provides a forging method for a scroll compressor bearing seat machining blank. The material is a 4032 aluminum alloy extruded rod with the diameter phi being 100. The technological process comprises the following steps of descaling, discharging, first coating heating, second coating heating, pre-forging, finish forging, heat treatment and shot blasting. The bearing seat machining blank forged through the forging method is good in compactness, simple in process, convenient to operate, high in material utilization rate, high in percent of pass and small in subsequent finish machining allowance. The process is quite suitable for market requirements.

The invention discloses a negative pressure die-casting method for a heat-resistant steel exhaust manifold. The negative pressure die-casting method solves the problems that the yield of castings is low and the process yield is low in an existing gravity casting process method. The method comprises the following step of putting a sand mold into a casting box, then exhausting air in the casting box to form a negative pressure environment, and finally pressing molten steel into a casting mold, thereby obtaining a heat-resistant steel exhaust manifold casting. According to the negative-pressure die-casting method for the heat-resistant steel exhaust manifold, the casting yield and the process yield are effectively increased. The invention further discloses a negative pressure die-casting device of the heat-resistant steel exhaust manifold. According to the negative pressure die-casting device for the heat-resistant steel exhaust manifold, the casting yield and the process yield are improved, meanwhile, the production cost is effectively reduced, waste gas is easily treated in a centralized mode, and the purpose of environment-friendly production is achieved.

The invention discloses double-layer flashy fabric with 20D black nylon yarns. The double-layer flashy fabric comprises a fabric body. The fabric body is formed by weaving warps and wefts on the basisof a basic tabby double-layer texture structure, and infinitely-changed stripe channel gaps are adopted. The wefts include first wefts and second wefts. The fabric body comprises a first fabric layerand a second fabric layer. The first fabric layer comprises the warps and the first wefts, and the second fabric layer comprises the warps and the second wefts. The warps refer to 20D / 24F nylon FDY-BL, the first wefts are 20D / 24F black nylon yarns FDY-BL processing yarns, and the second wefts are 20D / 24F nylon FDY-BL. The double-layer flashy fabric has the advantages that strength and tissue compactness are high; the fabric with down-proof texture is as thin as cicada's wings, and has high wrinkle resistance due to film ironing treatment, and accordingly, the hand feel is fine; the fabric isapplicable to top-grade shell fabric for spring, autumn and winter clothing, such as cotton-padded jackets and down jackets, and has a wide application range.

The invention discloses a magnetic conductive counter weight ring, a production method thereof and a magnetic control wheel. Materials of the magnetic conductive counter weight ring comprise, by weight, 30 to 80 meshes of iron powder, 3 to 8 % weight of the iron powder of manganese sulfide, 3 to 8 % weight of the iron powder sodium silicate and 6 to 12 % weight of the iron powder graphite powder. The production method of the magnetic conductive counter weight ring comprises the following steps of (1), mixing the materials to be uniform; (2) pressing the materials into an iron powder ring through an oil press and adjusting the pressure within a range from 3000 to 6000 MPa according to the sectional area of the iron ring; (3) arranging the iron powder rings into an electric furnace and enabling the temperature of the electric furnace to be from 400 to 800 degrees for 5 to 15 minutes firstly and then enabling the temperature to from 1000 to 1200 degrees for 5 to 15 minutes; (4) performing compression molding through a 300 to 600 ton oil press. The production method of the magnetic conductive counter weight ring has the advantages of utilizing waste materials, reducing energy consumption and accordingly reducing costs.

The invention discloses a processing technology for the working surface of an open-cavity forging die, which belongs to the field of processing heavy-duty shaft forging dies. The specific steps of the present invention are: Step 1: machining, milling out a cavity on the base material of the forging die; Step 2: heat treatment before welding, performing heat treatment on the base material of the forging die after machining; Step 3: surfacing welding on the working surface, The transitional arc section of the forging die working face is surfacing with well-shaped surfacing welding units, and the middle arc section and end arc section of the forging die working face are surfacing welding with grid surfacing welding units; Step 4: Post-weld heat treatment , heat-treating the forging die on the working face of the forging die after surfacing; Step 5: CNC machining and grinding, processing the forging die cavity to remove excess welding material on the surface after welding, and grinding and finishing the working face. The invention improves the performance of the forging die, improves the service life of the forging die, and the thickness of the working surface of the forging die in the transition arc section gradually increases from the end arc section to the middle arc section, thereby avoiding the collapse of the transition arc section.

The invention discloses a magnetic conduction weight ring, a magnetic control wheel and a preparation method thereof. Among them, the raw materials of the magnetically conductive counterweight ring include: 30-80 mesh iron powder, 3-8% manganese sulfide by weight of iron powder, sodium silicate by 3-8% weight of iron powder and 6-12% by weight of iron powder graphite powder. The preparation method includes the following steps: 1), stirring the raw materials evenly; 2), pressing the iron powder ring by a hydraulic press, and adjusting the cross-sectional area of ​​the iron ring within the range of 3000-6000 MPa; 3), putting the iron powder ring into an electric furnace, The electric furnace first uses 400-800 degrees for 5-15 minutes; then uses 1000-1200 degrees for 5-15 minutes; 4) 300-600 tons of hydraulic press for secondary pressing. The invention has the effects of waste utilization, energy consumption reduction and cost reduction.

The present invention provides a small-diameter thin-walled nickel-based pipe fine drawing process, comprising the following steps: 1) Heading the nickel-based pipe; 2) Cold drawing the pipe; 3) Heating and annealing the pipe; 4) Repeating step 2 ) and step 3) multiple times of cold drawing and multiple heating and annealing of the tube; 5) solid solution treatment of the finished tube obtained in step 4) under a protective gas atmosphere, and then cooling; 6) the tube obtained in step 5) Straightening, head and tail cutting, inspection and testing, cutting to length, packaging and storage. The precision drawing process of the small-diameter thin-walled nickel-based tube of the present invention has high process operability, adopts resistance heating annealing, and reasonably controls the holding position, and the position close to the head can reduce cold deformation stress due to heat conduction of the tube and prevent thin-walled nickel-based tubes The cold drawing process breaks the head.

The disclosed preparation method for self-lubricating alloy material comprises mainly: adjusting the sulfur content to improve product optimal lubrication effect, adding other alloy elements to reinforce ferrite. This product has strong wear-resist capacity to prolong its lifetime, and can also be prepared by powder metallurgy sintering with low cost.

The invention relates to a cold forging-based manufacturing method for boss used for a vehicle engine fuel track and a manufacture device. The manufacture method includes a cutting step of cutting a round-shaped steel rod for forming a cylindrical first mold body; a first forging step of pressing the outer periphery of the cylindrical mold body for forming a second mold body having a front flat face and a rear flat face and an upper and lower convex curve parts; a softening heat treatment step of performing annealing heat treatment on the second mold body to soften the second mold body; a film covering step of performing film covering on the second mold body by utilizing a film covering treating agent; a second forging step of utilizing a forging mold composed of an upper punch head and a lower mold part for pressing and forging the second mold body into a third mold body having a round trough part provided by the fuel track body; an ending step of performing abrasive blasting on the third mold body and performing surface treatment. The method can eliminate all defects caused by casting and minimize cutting procedures. The mold body is good in tissue compactness, high in strength, good in dimension precision and good in quality.

The invention relates to a chiller for a casting process, and in particular relates to a direct cooling chiller for casting gray cast iron castings and ductile iron castings. The direct cooling chiller is characterized by being made of common carbon steel, and is also characterized in that an anti-falling clamping groove structure is arranged on the outer surface of the direct cooling chiller; two end surfaces of the direct cooling chiller are used as working surfaces; a groove with the width of 15mm and the angle of 120 degrees is formed in the middle of the chiller. The chiller is made of a unique material, the utilization rate of a steel chiller is improved, the service life of the chiller is prolonged, the risk cost loss, caused by repair and defect treatment, of a customer in the machining process is reduced, and the chiller is easy to machine and manufacture.