24 results about "Forging" patented technology

The invention discloses an all-fiber-texture large-size one-piece flange fan main shaft forging method which comprises the following steps of material selection, heating, primary firing forging, secondary firing forging, heat treatment after forging, rough turning, ultrasonic flaw detection, hardening and tempering, semifinishing, lossless flaw detection, body sampling, mechanical property testing and stable heat treatment. Compared with the conventional twice-forging and welded flange main shaft production method, the all-fiber-texture large-size one-piece flange fan main shaft forging method has the advantages that the welding working procedures are reduced, the time is saved, the raw material consumption is reduced, and the production cost is lowered; a forged flange main shaft is of an all-fiber-texture structure, so that the natural defects that the welded flange is low in balance property and easy to deform and the root is easy to break are totally overcome; a requirement of a large-size fan on the main shaft design is met.

Disclosed is a simple method for manufacturing pure copper plates which does not involve cold forging or cold pressing after hot forging or hot pressing, or heat processing thereafter; also disclosed is the finely uniform pure copper plate which is obtained by said method, has low residual stress and excellent processability, and is especially suitable as a copper sputtering target material. Pure copper ingots of purity no less than 99.96 wt% are heated to 550-800 DEG C, and after hot pressing with a total press rates of 85% or more and a temperature at press completion of 500-700 DEG C, are quenched at a cooling rate of 200-1000 DEG C/min until the temperature reaches 200 DEG C or less from the aforementioned temperature at press completion.

The invention discloses a forging method of a driving shaft for a gearbox. The forging method of the driving shaft for the gearbox comprises the following steps: a step a of pouring a cylindrical blank material, wherein the cylindrical blank material comprises chemical components, by weight percent: no smaller than 0.096% but no greater than 0.150% of C, no smaller than 2.1% but no greater than 2.40% of Si, no smaller than 1.1% but no greater than 1.30% of Mn, no smaller than trace amountbut no greater than 0.033% of P, no smaller than trace amount but no greater than 0.0260% of S, 0.11-0.22% of Ni, no smaller than 8.50% but no greater than 11.50% of Cr, no smaller than trace amount but no greater than 0.018% of B, and the balance of Fe and inevitable included impurities; and the step a comprises the following steps: decreasing the temperature of blank bodies shaped in a pouring way to 350 DEG C, then heating the blank bodies to 670 to 760 DEG C for 3-5h heat preservation, cooling the blank bodies in a furnace to 300 DEG C for 4h heat preservation, reheating the blank bodies to 650 to 760 DEG C for 17h heat preservation, cooling the blank bodies to 400 DEG C at a speed of 50 DEG C per hour and finally cooling the blank bodies to 140 DEG C at a speed of 20 DEG C per hour; and a step b of forging, wherein the step b comprises the following steps: a step 1 of selectively using 30-diameter round steel and cutting by using a shearing machine, wherein the length of a sheared rough blank piece is 70.3mm; and a step 2 of putting the rough blank piece of the step 1 in an intermediate frequency heating furnace for heating at a heating temperature of 1120 to 1180 DEG C and keeping the heating for 3.6min. The forging method of the driving shaft for the gearbox is beneficial to the large-batch industrial production of the driving shaft for the gearbox; and moreover, the phenomena of dirt inclusion and impossible fullness occurring during the forging process are reduced, the mechanical performance of a product is further improved, the product material is saved and the service life of a die for the product is prolonged.

The present invention provides a fine grain surface layer steel part having a high proof strength ratio equal to or higher than that of conventional quenched and tempered materials, that is, a fine grain surface layer steel part containing, by mass %, C: 0.45% to 0.70%, Nb: 0.01% to 0.60%, Si: 0.10% to 1.50%, Mn: 0.40% to 2.0%, P: 0.10% or less, S: 0.001% to 0.15%, and N: 0.003% to 0.025% and having a balance of Fe and unavoidable impurities, where the surface layer and inside at all or part of the part have structures of different average particle sizes of ferrite crystal grains surrounded by high angle grain boundaries of a misorientation angle of 15 degrees or more and a method of production of that part comprising warm forging locations where strength is required to a predetermined shape at 1000° C. to 800° C. during which working so as to give an equivalent strain of 1.5 or more.

The invention relates to a preparation method of aluminum alloy rod materials, and aims to solve the problems that in the prior art, structural defects including coarse grain rings and the like are easy to generate, so that physical properties of the material are reduced, normal use of the material is influenced, and using risks are caused. The preparation method comprises the following steps of casting ingots, heating ingots, performing an extruding technology, performing product quenching according to quenching condition requirements, and performing stretching and flattening. According to the preparation method disclosed by the invention, the extruding technology adopts a dual-hole mold for backward extruding, so that the extrusion ratio is reduced; in the extrusion process, the deformation of aluminium ingots is reduced, the formation of coarse grains is restrained, and besides, the production efficiency is improved; the tensile strength of the aluminum alloy rod materials preparedby the invention is greater than or equal to 460MPa; the yield strength is greater than or equal to 400MPa; the elongation percentage is greater than or equal to 10%; and the preparation method is applied to the field of forging of aluminum alloys.

The invention relates to a dual-purpose steel for hot forging, warm extruding and cold stamping tools and dies and belongs to the technical field of alloy steel manufacturing technologies. The dual-purpose steel for the tools and dies comprises the following components in a percent by weight: 0.15-0.35% of C, 0.4-1.4% of Si, 0.5-1.4% of Mn, 2.5-8.5% of Cr, 0.95-4.75% of Mo, 0.8-3.65% of W, 0.5-2.0% of V, 0.2-1.75% of Ni, 0.5-2.5% of Co, 0.1-0.56% of Nb, 0.01-0.3% of Re and the balance Fe. The dual-purpose steel is high in mechanical properties, high in strength, great in tenacity, high in hardness, resistant to wear, durable, long in service life and suitable for hot, warm and cold working conditions.

The invention particularly relates to a semiconductor radiator and a processing method thereof. The processing method of the semiconductor radiator includes the steps of (1), raw material processing;(2), heat treatment; (3), preforming; (4), secondary heat treatment; and (5), rotary forging. The radiator processing method has the advantages of lower processing temperature, no need of mass cutting, materials saving and a larger radiating area of a radiating column of the processed radiator.

The invention provides a forging and pressing die which is used for punching a red-hot copper rod into a water meter shell body in one step. The water meter shell body forging and pressing die adoptsa water meter shell body cavity formed by combining a pair of Half die cores, the die cores are arranged in a die base formed by combining a pair of Half die bases and having inclined outer walls, thesplit positions of the Half die bases are provided with core-pulling sliding blocks, the Half die bases are arranged in a penetrating cavity with die carrier sidewalls being inclined walls, a jackingrod is arranged under the die base, and the jacking rod jacks up to drive the Half die bases, the Half die cores and the core-pulling sliding blocks to move upwards to open along the die carrier sidewalls being the inclined walls. The water meter shell body forging and pressing die has the advantages of high production efficiency and convenient and rapid operation, and solves the one-time hot forging and pressing forming problem and the die opening and piece taking-out problem of the water meter shell body invention.

The invention discloses a 5CrNiMo tempering process. The process includes: 1) determination of the tempering heating temperature of 5CrNiMo at 490DEG C-530DEG C; 2) determination of the tempering time: the tempering heat preservation time of steel with effective thickness of 300mm is 6h, and the heat preservation time of alloy steel can be increased by 1/3, therefore the hammer forging die 5CrNiMo tempering time is 7h; 3) determination of the tempering cooling mode: oil cooling is carried out after furnace discharge to prevent temper brittleness, in order to eliminate the stress generated by oil cooling, retempering can be performed at 160DEG C-180DEG C, and after tempering, the product cannot be cooled to room temperature in oil, otherwise cracking is likely to occur; 4) determination of the tempering hardness: the tempering hardness is within a required range of 32-35HRC; and 5) guarantee of sufficient forging die tempering time to avoid cracking caused by excessive high hardness at the core of the die; and prevention of second class brittleness in cooling after forging die tempering, and at the same time implementation of second tempering with a temperature about 10DEG C lower than the first tempering temperature and a holding time shortened by 20%-25%.

The invention discloses a forging method for a drive axle lifting oil cylinder. The forging method comprises the following steps: a) preparing and casting a steel ingot with the following alloy components in percentage by weight: greater than or equal to 0.32% but less than or equal to 0.42% of C, greater than or equal to 0.26% but less than or equal to 0.32% of Si, greater than or equal to 0.24% but less than or equal to 0.45% of Mn, greater than or equal to 0.08% but less than or equal to 0.18% of P, greater than or equal to trace amount but less than or equal to 0.025% of S, greater than or equal to 0.35% but less than or equal to 0.48% of Cr, greater than or equal to 0.33% but less than or equal to 0.44% of Mo, greater than or equal to 0.65% but less than or equal to 1.30% of Ti, greater than or equal to 0.08% but less than or equal to 0.20% of Sn, and the balance Fe. The forging method is convenient in blank forming, high in efficiency and easy in forging forming; the forged drive axle lifting oil cylinder is good in strength, long in service life, safe and reliable, and suitable for mass forging production of drive axle lifting oil cylinders of various models.

The invention discloses a plug type oval shell structure of an LED (Light Emitting Diode) lamp. The plug type oval shell structure is characterized by comprising a shell, a lamp cover and a plug, wherein the shell is of an oval structure and is connected with the lamp cover, and the plug is connected with the shell at the other end of the shell. According to the plug type oval shell structure of the LED lamp, disclosed by the invention, the plug is directly connected with the shell of the LED lamp and can be directly inserted in a power supply for use in a mobile using occasion, the application range of the LED lamp is increased, and the use is convenient; the shell is of the oval structure, the appearance is attractive and elegant, meanwhile, the shell is formed by carrying out precise cold forging on pure aluminum blank, and the heat dissipation efficiency of the shell is increased.

The invention provides a high-strength antibacterial titanium alloy plate and a preparation method thereof. The high-strength antibacterial titanium alloy plate comprises the following chemical components in percentage by weight of 5.5-6.5% of Al, 3.5 to 4.5% of V, 3 to 9% of Cu, and the balance Ti. The preparation method of the titanium alloy plate comprises the following steps of smelting in a vacuum consumable electrode furnace to obtain a raw material ingot; performing cogging and forging at the temperature of 1000 DEG C or above after the ingot is ground, and performing precise forging and machining to form a plate blank; carrying out heat preservation on the plate blank for a period of time at the temperature of 1000 DEG C to 1300 DEG C, then, rapidly cooling the plate blank, and enabling a plate to obtain an ultrafine nanometer lath structure; after quenching, performing rough rolling on the plate blank at the temperature of 800-900 DEG C, enabling the hot rolling accumulated deformation amount to be larger than or equal to 90%, and obtaining an ultrafine nanometer lath structure plate; and after rough rolling, performing finish rolling on the plate at the temperature of 700-780 DEG C to obtain the plate with the required size. The structure of the plate processed by the method is equiaxed grains, the size of the plate is less than 400nm, and the grains are not coarsenedand grow up within 3h of aging at 650 DEG C or below.

The invention belongs to the technical field of steel for bucket teeth and relates to steel for high-quality bucket teeth for forging and a preparation method thereof. Components of the steel comprise0.27%-0.29% of C, 1.87%-1.97% of Si, 1.15%-1.25% of Mn, smaller than or equal to 0.020% of P, smaller than or equal to 0.010% of S, 2.05%-2.15% of Cr, 0.020%-0.030% of Ti, 0.23%-0.28% of Mo, 0.020%-0.045% of Al and 0.03%-0.05% of V. To solve the problems that discharging is difficult, and hardness distribution and dispersion of the bucket teeth are poor, by optimizing design of the components ofthe steel and production technology parameters, the practical problems that a user cannot discharge hot-rolled materials easily, and cannot carry out sawing, and saw bars are wasted are solved successfully, an obtained product steel has high strength, high hardenability and high purity, the same section hardness of the bucket teeth is more uniform, and the service life of the bucket teeth is prolonged remarkably.

The invention belongs to the technical field of gear forging, and particularly discloses an automotive transmission gear forging method. The method includes the following steps that 1, blanking is conducted, low-carbon steel is selected to heat a high-frequency furnace, and the heating temperature ranges 1100 DEG C to 1300 DEG C; 2, blank machining is conducted through a cold pressing die, and formed teeth are corrected through a standard tooth die; 3, carburizing and quenching are conducted; 4, saponification of phosphorus, gear machining and gear face carburizing are conducted, and the surface carburizing thickness ranges from 0.7 mm to 0.8 mm. A gear formed through the automotive transmission gear forging method has the following advantages that the mechanical performance is excellent, degassing is achieved effectively and carbon oxide is not removed by heating metal through vacuum hardening; the service life is prolonged by 2 times to 4 times; slow heating is conducted in a thermal radiation mode, uniformity is achieved, and the deformation and the degree of dispersion are small; vacuum heating is conducted, the surface is smooth, and quality is good; the manufacturing cost is low, and the production process is environment-friendly and free of pollution.

The invention relates to an assembling and welding method for a truss layer corner column, which comprises the following steps of: respectively welding box type forgings with box body end heads, and preheating welding positions before welding by adopting an electric heating method; a jig frame is erected according to the assembly inclination of the box type forge piece and the brackets and the requirements of a design drawing, the inclination of a plate, used for supporting the brackets, at the topmost end of the jig frame is kept consistent with the inclination of the brackets, and the first bracket on the upper portion, the fourth bracket on the lower portion and the protruding position of the forge piece are assembled; a second bracket and a third bracket are assembled with the other two faces of the box type forge piece; and annealing treatment is conducted on the box body end and the welding seam of the bracket and the box type forge piece. According to the assembling and welding method, the welding seams of the components are planned, the phenomenon that the welding seams are too concentrated is avoided, meanwhile, the webs connected with the bracket flange plates are changed into the permeable webs, the thickness is small, discontinuous connection is achieved, the welding amount of the bracket is reduced, and materials and the manufacturing cost are also saved.

The invention relates to a method for manufacturing a bottom shrunk type steel ingot mold. The bottom of the steel ingot mold is shrunk, the inner wall at the bottom shrunk position is provided with two section different reducing openings and two section different opening heights, the reducing opening, close to an outer opening, is a small opening, a reducing large opening is located on the side part of the interior of the small opening, the height H of the large opening is larger than the height h of the small opening, so that too fast melting loss of the shrunk part can be prevented; and a smooth transition is formed between the height H of the large opening and the height h of the small opening. According to the method, the bottom structure of the steel ingot mold is locally changed, sothat the process and material waste and the influence on the rear forging procedure are reduced, meanwhile, the situation that cracks and peeling are generated at the bottom of the steel ingot mold is reduced, and the service life of the steel ingot mold is prolonged. The bottom shrunk type steel ingot mold can be widely applied to occasions of producing polygonal steel ingots and plum-shaped steel ingots, the steel ingot mold does not change the overall shape of the steel ingot, the operation is convenient, and the steel ingot mold has an ideal practical effect.

The invention discloses a transmission shaft forging process which comprises the following steps of: 1) heating a blank steel ingot to 1200-1220 DEG C by use of first fire, performing chamfering, and performing heat preservation for 6 hours; 2) upsetting the blank obtained in the step 1) by use of a circular tooth-shaped upper-convex and lower-concave swage, pulling the blank, and then naturally cooling the blank to 450-500 DEG C; and 3) heating the blank obtained in the step 2) to 700-720 DEG C, performing heat preservation for 3-4 hours, then performing furnace cooling to 320-350 DEG C, performing heat preservation for 2-3 hours, further heating the blank to 680-700 DEG C, performing heat preservation for 18-20 hours, performing furnace cooling to 100 DEG C, and discharging. The forging process is capable of eliminating internal defects and greatly improving the strength and rigidity of forged pieces.

The invention discloses a forging technology of a high-precision forklift bearing ring. The forging technology comprises the following steps: blanking, heating, forging, planishing, broaching and blasting shots. During heating, temperature is raised to 28-30DEG C/min. During forging, temperature is kept at 1150-1170DEG C for 10-12 minutes. During planishing, the planishing reduction quantity is 18-20% of the width of the ring. During broaching, the broaching ratio is 1.3-1.5. Through the mode, the forging technology can improve forging quality and prolong the service life of the bearing ring, and at the same time, increases the utilizing rate of metal materials, saves raw materials and reduces the cost.

The invention discloses a die forging process method of a main starting connector of an airplane. The die forging process method includes the steps that 1), a cast ingot blank is heated, and the rotary blank is cogged with a free forging method to form a free forging blank; 2), the free forging blank is machined into a prefabricated blank with a preset shape; 3), the prefabricated blank is machined into a pre-pressed part with a pre-formed high line; and 4), a main starting joint die forging finally-pressed part is formed by the pre-pressed part through a final pressing procedure. By means ofthe die forging process method of the main starting connector of the airplane, the phenomena that insufficient filling, folding, cross flowing and the like exist at the position of the high line of the main starting connector can be effectively avoided, and therefore a die forging with high dimensional precision and a uniform deformation structure is obtained.

The invention discloses a repair method for eliminating clutters generated during the ultrasonic flaw detection of a high-temperature alloy, and belongs to the field of alloy repair methods. The method is characterized by comprising the following steps: S1, heating: heating a coarse-grain forging to a solid solution temperature, and preserving the heat of the forging; S2, preparing a die: specifically, preheating the die, then performing heat preservation on the die for a period of time to prevent forge piece cracking caused by quenching when the die makes contact with a forge piece; S3, bulging: specifically, transferring the forge piece into a bulging machine, then sleeving the forge piece into the die, laying the die flat, starting the bulging machine, making pressing die to move downwards to drive the die to move in the radial direction, allowing the outer diameter of the forge piece to extend outwards to reduce the wall thickness of a ring piece; S4, maintaining pressure: specifically, when the die moves in place, stopping, and maintaining the pressure for a period of time; and S5, cooling: specifically, covering the forge piece with a heat preservation material during pressure maintaining to prevent the generation of stress due to too fast cooling. The method has the advantages the forge piece does not need to be repaired through multiple times of solid solution, and thequality and stability of a repaired product are improved.

The invention discloses a surface-strengthened inner step shaft inner hole precision forming process. The process comprises the following steps that firstly, a blank is designed, and a lubricant is pumped into an internal area formed by a lubricant main runner and lubricant sub-runners of a mandrel; the mandrel and the blank are assembled, a rotary swaging machine is mounted through a mounting hole at the rear portion of the mandrel, the mandrel and the blank are subjected to high-frequency forging of a forging die together, and a large inner hole is formed through rotary swaging; then the positions of the mandrel and the blank are adjusted, rotary swaging is started from the protruding position of the blank, and a small inner hole is formed through rotary swaging; a die for strengthening is replaced and used, the rotary swaging machine is assembled, the rotating speed of a motor of the rotary swaging machine is reduced, so that the impact energy of the die is reduced, the overall surface of the blank subjected to inner hole rotary swaging is forged, uniform pressure stress is added to the surface of the blank, and the surface secondary strengthening effect similar to shot blasting impact is achieved; and finally, a workpiece is taken away. The inner hole forming can be guaranteed, the surface of a shaft can be effectively strengthened, and the fatigue strength is improved.