119results about How to "Optimizing Forging Performance" patented technology

The invention relates to a magnesium alloy plastic processing technology, and relates to a forging method for multi-direction, circulatory and high-speed hammer forging of a magnesium alloy. The method comprises the specific steps: after carrying out homogenization annealing of a casting-state or deformation-state magnesium alloy, carrying out continuous high-speed hammer forging along one direction of the bulk material at a certain temperature; after a certain deformation amount is reached, overturning the material, and continuing to carry out continuous high-speed hammer forging along another direction to reach a certain deformation amount; then overturning the material to another direction, and carrying out such circulatory hammer forging until the material reaches a predetermined deformation amount and size; and finally, carrying out heat treatment on the material. The method utilizes the textured micostructure formed during the processes of high-speed hammer forging of the magnesium alloy to be combined to change the hammer forging direction, thereby improving the ultimate deformation amount that the magnesium alloy can withstand and is not cracked during forging, and improving the plastic processing performance of the magnesium alloy. The method is suitable for magnesium and the alloy material thereof, and improves the forging processing production efficiency of magnesium and the alloy material thereof.

The invention provides a preparation method of aluminum base graphene alloy. The method comprises the following steps: preparing graphene and aluminum and/or aluminum alloy mixed powder, carrying out cold pressing, and carrying out sintering molding. The method improves an original preparation technology of the aluminum base graphene alloy, and has the advantages of production period and cost reduction, simple process operation, simple required device, high production efficiency, low preparation cost, and easy realization of large-scale industrialization.

The invention discloses high-hardenability gear steel. The high-hardenability gear steel comprises the chemical elements of, by mass, 0.19-0.25% of C, 0.15-0.35% of Si, 0.70-1.05% of Mn, 0.70-0.80% ofCr, 0.40-0.65% of Ni, larger than 0 and less than or equal to 0.20% of Cu, 0.33-0.40% of Mo, 0.020-0.050% of Al, 0.003-0.010% of Ti, 0.05-0.08% of b, 0.0001-0.0003% of B, 0.0080-0.0150% of N, and thebalance Fe and other inevitable impurities. The invention further discloses a gear which is obtained through the high-hardenability gear steel. In addition, the invention further discloses a manufacturing method of the high-hardenability gear steel. The high-hardenability gear steel is high in strength and good in toughness.

The invention relates to an iron sheet forging device, and particularly relates to a rapid iron sheet forging device for hardware. The invention aims to solve the technical problem of providing the rapid iron sheet forging device for hardware, which has the advantages of good forging effect, simplicity in operation and high stability. In order to solve the technical problem, the invention provides the rapid iron sheet forging device for hardware. The rapid iron sheet forging device comprises a bottom plate, a left side plate, a first guide rod, a first sliding rail, a top plate, a push rod, a fixed stop block, a carbon fire box, an electromagnet, a first sliding block, a motor, a gear, a vertical plate, a transverse plate, a second guide rod, a lifting rod, a rolling shaft, a first connecting rod, a hammer, a second belt pulley and the like, wherein the left side plate, the first guide rod and the first sliding rail are arranged on the bottom plate in sequence from left to right, and the top plate and the like are arranged on the right side of the left side plate in sequence from top to bottom. The invention provides the rapid iron sheet forging device for hardware, the effects of good forging effect and high stability are achieved by utilizing a water tank and an inclined plate, and the rapid iron sheet forging device is operated only by controlling the motor.

The invention discloses high-carbon non-tempered steel for breaking a connecting rod and a manufacturing method thereof. The high-carbon non-tempered steel comprises the following chemical elements in percentage by weight: 0.65%-0.85% of C, 0.15%-0.25% of Si, 0.50%-0.60% of Mn, 0.010%-0.045% of P, 0.060%-0.070% of S, 0.10%-0.20% of Cr, 0.55%-0.80% of Ni, 0.03%-0.04% of V, 010%-0.20% of W, 0.0120%-0.0160% of N, 0.0001%-0.0004% of Re and the balance of Fe and inevitable impurities. The manufacturing method comprises the following steps: electric furnace primary smelting; ladle refining and vacuum degassing; die casting or continuous casting; and steel bar rolling. The high-carbon non-tempered steel has relatively high strength and good breaking performance.

The invention provides a preparation method of titanium matrix graphene alloy. The method comprises the following steps: preparing graphene and titanium and/or titanium alloy mixed powder, filling a jacket with the mixed powder, carrying out vacuum degassing, carrying out hot isostatic pressing, re-melting, and homogenizing. A certain amount of the titanium matrix graphene alloy precast ingots are re-melted in titanium alloy melt, the content of graphene in a composite material can be well controlled through calculating, and graphene cannot float, so the content of graphene in the titanium matrix graphene alloy can be accurately controlled; and the preparation method is provided on the basis of semi-continuous melting casting, and has the advantages of simple operation, high production efficiency, low preparation cost, and easy realization of large scale industrialization.

The invention provides a preparation method of a magnesium base graphene alloy. The method comprises the steps of: preparing mixed powder of graphene and magnesium and/or magnesium alloy, putting the mixed powder into a cover for vacuum degassing, performing hot isostatic pressing, remelting and performing homogenization treatment. According to the method, a certain quantity of magnesium base graphene alloy prefabricated ingot is remelted into magnesium alloy molten liquid; the content of graphene in a composite material is preferably controlled through calculation; as the graphene does not float out, the content in the magnesium base graphene alloy can be accurately controlled; and the preparation method is provided based on semi-continuous casting, and is simple in process operation, high in production efficiency, low in manufacturing cost and easy for realizing large-scale industrialization.

The invention provides a W-Cu composite material which is characterized by comprising the following components in percentage by mass: 5-30 wt% of Cu, 0.5-2 wt% of rare-earth oxide and the balance of W. The invention also provides a preparation method of the W-Cu composite material. The density of the composite material is up to 99.2%, the density uniformized coefficient of different positions is less than 5%, the room temperature tensile strength is greater than 900 MPa, the elongation percentage is greater than 10%, and the fracture toughness K1C is greater than 28 MPa.m<1/2>; and thus, the composite material satisfies the performance requirements of electric contact materials and liner materials for complete density, structure uniformity, ablation resistance and the like of the W-Cu alloy.

The invention belongs to the technical field of forging and in particular relates to a method for forging a super-long hollow part through an oil pressing and forging machine. The method comprises the steps of heating a steel ingot, cutting and blanking through an oil press, upsetting, punching, chambering, drawing a core shaft, forging to form a finished product, annealing, roughly processing, tempering and finely processing to form the finished product. On the premise of not increasing equipment, the clamping moment problem of a free forging oil press and an operation machine can be solved by using a specific tooling and a unique forging method. According to the method disclosed by the invention, the tonnage for the free forging press to forge the steel ingot can be greatly increased; by using the method, a pipe casting die blank beyond the clamping moment of the free forging press can be successively forged; furthermore, the free forging operation machine cannot operate in overloading the forging process; and the forging capability of the equipment is greatly increased.

The invention discloses a manufacturing method of low-oxygen low-inclusion bearing steel. The manufacturing method comprises the steps of preparing of raw materials, converter smelting and alloying, LF+VD refining, continuous casting, rolling and slow cooling, wherein the mass percent of chemical components of the bearing steel in content is controlled to reach the standards of 1.06-1.1% of C, 0.7-0.75% of Si, 1.30-1.35% of Mn, 0.02-0.05% of Mo, 0.06-0.08% of Ni, 1.85-1.9% of Cr, 0.02-0.04% of Co, 0.02-0.03% of V, 0.01-0.03% of Als, 0.02-0.03% of Hf, 0.01-0.02% of Ta, 0.005-0.008% of Te, 0.05-0.1% of Cu, less than or equal to 0.025% of S, less than or equal to 0.025 of P, less than or equal to 10*10<-6> of O, less than or equal to 2*10<-6> of H and the balance Fe and inevitable impurities.According to the manufacturing method of the low-oxygen low-inclusion bearing steel smelting, the raw materials, the refining process, refining slag, crystallizer casting powder and the continuous casting process are controlled, so that the content of the obtained non-metal impurities of the bearing steel is low, and the content of the Ti is low; the phenomenon of nozzle nodulation is avoided inthe continuous casting process of square billets, blank throwing is smooth, the solidification speed of a blank shell is high, and safety of continuous casting is ensured, so that a final product is uniform in component, stable in performance and good in strength; and after heat treatment, the yield strength reaches 700 MPa, the tensile strength reaches 910 MPa, and the elongation at the cross section reaches 35%.

The invention discloses a manufacturing method for an automobile transmission gear, and relates to the field of manufacturing of automobile parts. The method comprises the following steps: (1) blank forging, (2) spheroidizing annealing, (3) turning machining, (4) hobbing, (5) gear shaving, (6) carburization, (7) quenching and tempering and (8) grinding machining. According to the method, spheroidizing annealing treatment is adopted, so that the cutting performance of the gear is improved, a structure with spheroidized or granular carbide uniformly distributed on a ferrite substrate is obtained for preparation for subsequent heat treatment; a gas carburization method is adopted, and volatile kerosene is used as a carburizer, so that carburization effects are effectively improved, the thickness of a carburized layer is increased, the surface of the gear is hard and wear-proof, and high toughness of the core of the gear is maintained; quenching and tempering heat treatment is adopted after carburization, so that the carburization effects are further consolidated, and the mechanical performance of the gear is improved.

The invention discloses a swash plate of an automobile air-condition compressor. The swash plate is prepared from an aluminium alloy comprising the following components in percentage by weight: 13-15% of Si, 4-5% of Cu, 0.2-0.3% of Mg, 0.8-1.5% of Ni, 0-0.1% of Mn, 0-0.5% of Fe, 0-0.1% of Zn, 0-0.2% of Ti, 0.1-0.3% of C, 0.1-0.3% of RE and the balance of Al. The invention further provides a production method of the swash plate of the automobile air-condition compressor. According to the production method provided by the invention, the high-temperature strength and the high-temperature hardness of the swash plate are improved, the cutting properties and the plasticity are improved, and low-cost production is realized by choosing and controlling elements in the aluminium alloy for the swash plate, and then replacing casting by forging, optimizing the pre-treatment and the post-treatment of the forging, and optimizing process parameters during the various treatment processes.

The invention discloses a tetrapod-shaped zinc oxide whisker reinforced aluminum alloy hub and preparing method thereof. The aluminum alloy hub is made of compositions including, by weight percent, 8% to 14% of tetrapod-shaped zinc oxide whiskers, 12% to 16% of silicon, 1.0% to 1.5% of strontium, 0.12% to 0.18% of tantalum, 2.0% to 2.8% of magnesium, 1.8% to 2.4% of manganese, 0.40% to 0.56% of chromium and the balance aluminum. The preparing method comprises the steps of burdening, smelting, atomizing and obtaining aluminum alloy powder; performing ball mill mixing, performing cold isostatic pressing, demolding, performing sleeving coating treatment, performing warming pressure maintaining treatment and obtaining a blank; heating, rolling, forging, and spinning forming to obtain a hub workblank; and performing heat treatment, machining and surface treatment, and obtaining a hub finished product. After-casting treatment temperature is reasonably controlled, and the alloy is uniform in crystallization, high in strength, resistant in corrosion and impact, good in heat resistance, free of bubbles and good in casing and forging performance.

The invention discloses a low-lead brass alloy. The low-lead brass alloy comprises 61.5-63.5% of copper and 0.02-0.15% of arsenic and also comprises less than or equal to 0.3% of nickel, less than or equal to 0.1% of aluminum, less than or equal to 0.2% of lead, less than or equal to 0.1% of manganese, iron and tin and the balance Fe and unavoidable impurities, wherein the content of the unavoidable impurities is less than or equal to 0.2%. The low-lead brass alloy reduces an alloy manufacturing cost, improves cutting ability and improves dezincification resistance.

The invention relates to the technical field of dies, in particular to a closed cold-temperature precision forging die for a straight-tooth bevel gear. The closed cold-temperature precision forging die for the straight-tooth bevel gear comprises a precision forging upper die, a precision forging lower die and an upper punch. The precision forging upper die is formed by combining a plurality of upper die units, each upper die unit is provided with a corresponding driving mechanism, the upper die units are mutually connected under driving of the driving mechanisms and are enclosed to form the precision forging upper die or the upper die units can be separated in scattering mode to facilitate forge piece taking out, and a channel used for the upper punch to pass through is arranged at the mutually connected upper ends of all the upper die units. The precision forging die is not provided with a lower punch so that manufacture cost is reduced, die assembling errors are reduced and forging accuracy is improved. The precision forging die can be form parts with complex shapes in once forming mode and accordingly is high in production efficiency. Simultaneously, metal flow lines are continuously distributed along the appearance of the forge pieces during forging so that the forge pieces are good in mechanical property.

The invention relates to high wear resistant ultra-high carbon steel, which mainly contains alloy element chromium and comprises the chemical components: (according to weight percentage): 1.25-1.35% of C (carbon), 3.2-4.2% of Cr (chromium), 0.5-1.2% of Si+Al (silicon and aluminum), 0.85-1.25% of Mn (manganese), 0.08-0.15% of V (vanadium), 0.3% of Mo (molybdenum) or less than 0.3% of Mo, 0.025% of S (sulphur) or less than 0.025% of S, 0.025% of P (phosphorus) or less than 0.025% of P and the rest of Fe (ferrum) and inevitable impurities. The preparation method for the high wear resistant ultra-high carbon steel includes that after being refined, the components are heated at the temperature of 900-920 DEG C and are in salt bath at the constant temperature of 300-320 DEG C for 30min, and then the components are placed into a 320-340 DEG C box-type resistance furnace and insulated for 120-240min prior to air cooling. The high wear resistant ultra-high carbon steel can be produced by the aid of a medium frequency induction furnace, a vacuum induction furnace and an arc furnace with LF (low frequency) refining process. Compared with high manganese steel and high-chromium iron wear-resistant materials, the high wear resistant ultra-high carbon steel is remarkably lower in production cost. The high wear resistant ultra-high carbon steel with high hardness (55-57HRC (Rockwell hardness)) and fine impact flexibility (higher than or equal to 40J/cm2) can be used for manufacturing wear resistant parts such as hammerheads of crushers, liners for ball mills and the like requiring high wear resistance.

The invention relates to an environment-friendly silicon tin brass suitable for forging. The environment-friendly silicon tin brass comprises the following components in percentages by weight: 66-72% of copper, 0.4-3.0% of silicon, 0.03-1.0% of tin, 0.001-0.1% of titanium, not more than 0.2% of lead and the balance of zinc and unavoidable impurities, wherein the total amount of the unavoidable impurities is not more 0.2%. A preparation method comprises the following steps of: firstly, preparing copper silicon and copper titanium intermediate alloys; then sequentially adding electrolytic copper, the copper silicon intermediate alloy, electrolytic zinc and a tin ingot into an induction electric furnace to smelt; adding the copper titanium intermediate alloy after all metals are melted; thenpouring a copper alloy ingot, wherein a copper alloy cast ingot is heated to 650-750 DEG C and thermally extruded; uniformly annealing an extruded semifinished product; and then carrying out acid washing, stretching, straightening and stress relief annealing to obtain a finished product. In the invention, lead is replaced with silicone to improve the cutting property and the forging property of the alloy, tin is used for improving the cutting property and the dezincification and corrosive resistances of the alloy, and the titanium is used for refining crystal grains. Comparative experiments show that the environment-friendly silicon tin brass suitable for forging has better forging property, cutting property and dezincification and corrosive resistances.

This invention provides a case-hardening steel excellent in cold forgeability and low carburization distortion property that exhibits low deformation resistance and high limit compressibility when cold, namely, a case-hardening steel excellent in cold forgeability and low carburization distortion property comprising, in mass %, C: 0.07% to 0.3%, Si: 0.01% to 0.15%, Mn: 0.1% to 0.7%, P: 0.03% or less, S: 0.002% to 0.10%, Al: 0.01% to 0.08%, Cr: 0.7% to 1.5%, Ti: 0.01% to 0.15%, B: 0.0005% to 0.005%, N: 0.008% or less, and the balance of Fe and unavoidable impurities, and having a metallographic structure comprising 65% or greater of ferrite and 15% or less of bainite.