Patents
Literature
24 results about "Upset forging" patented technology
Efficacy Topic
Property
Owner
Technical Advancement
Application Domain
Technology Topic
Technology Field Word
Patent Country/Region
Patent Type
Patent Status
Application Year
Inventor
Upset forging, also known as heading, is a manufacturing process which decreases the length of a workpiece in order to increase the diameter of the material in this area.
Stable clamping device for forging special-shaped metal piece
The invention relates to the technical field of metal forging forming, and discloses a stable clamping device for forging special-shaped metal parts, which comprises a base arranged in forging equipment, the top of the base is fixedly connected with an anvil block which can be used for bearing blanks, the base is rotationally connected with a driving plate through a guide rail arranged in the base, the top of the driving plate is provided with a clamping piece which can be used for limiting the positions of the blanks, the clamping piece comprises a driving unit arranged at the top of the driving plate, a limiting seat is arranged in the driving unit, and the driving unit is connected with the driving plate. And the two limiting seats are symmetrically distributed along the center of the driving plate. The stable clamping device for forging the special-shaped metal part can effectively solve the problems that in the prior art, manual correction is prone to causing deviation between a blank and the striking axis of a forging hammer, asymmetric upsetting occurs in the blank upsetting process, the radial size distribution of a preformed blank is uneven, and the finish forging quality of the blank is affected.
Owner:DONGGUAN JIANCHENG ELECTRONICS TECH
Niobium rod for Nb3Sn superconducting wire niobium material and preparation method thereof
The invention provides a niobium rod for an Nb3Sn superconducting wire niobium material and a preparation method of the niobium rod, and the preparation method of the niobium rod comprises the following steps: a, upsetting and drawing forging: carrying out n times of upsetting and drawing forging on a niobium cast ingot, n is any integer in 2-5, and carrying out annealing heat treatment in a gap between two times of upsetting and drawing forging or after the last upsetting and drawing forging, the upsetting and drawing forged round bar is obtained; b, radial forging is conducted, specifically, the upsetting and drawing forging round bar is subjected to radial forging; and c, rotary forging: carrying out rotary forging on the rod blank subjected to radial forging. The niobium rod prepared by the method meets one or more of the following items: the grain size is 7-8 grades, the elongation at break is greater than or equal to 40%, and the hardness (HV / 2.9 N) is greater than or equal to 40 and less than or equal to 65. Namely, the niobium rod prepared by the preparation method has at least one of the characteristics of uniform and fine grains, low hardness and high plasticity, and the comprehensive performance of the niobium rod is improved, so that the strict requirements of the Nb3Sn superconducting wire on the base material in high-field magnet application are met.
Owner:NINGXIA ORIENT TANTALUM INDUSTRY CO LTD
Preparation method of high-strength long-life red copper bottom pad
The application discloses a preparation method of high-strength long-life red copper bottom pad, which comprises the following steps: upsetting forging of red copper ingot to obtain a pie-shaped blank; machining the pie-shaped blank into a stepped cylindrical blank; cold forging of the stepped cylindrical blank by using a 3000-ton oil press, the large-diameter surface of the blank forging is in contact with a lower anvil, and a die steel force receiving piece is arranged on the small-diameter surface of the blank forging, during the forging, the upper anvil of the oil press is fully loaded on the die steel force receiving piece, the die steel force receiving piece is moved clockwise or counterclockwise once under the clamping of the operating machine clamp lever every time the loading is performed, and the upper surface is forged once until the upper surface is forged once; semi-finishing and finishing of the bottom pad blank after the cold forging, and scribing, drilling and tapping of the threaded hole after the machining, so that the machining of the bottom pad is completed. The hardness of the red copper bottom pad processed by the method is inconsistent on the upper surface and the lower surface, the hardness of the upper working surface is higher than that of the lower working surface, and the red copper bottom pad has high yield point strength and tensile strength.
Owner:西部超导材料科技股份有限公司
Automatic upsetting die with supporting mechanism and using method
Owner:SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
Die assembly upsetting device convenient to discharge and use method of die assembly upsetting device
The invention belongs to the technical field of mold closing and upsetting, particularly relates to a mold closing and upsetting device convenient for discharging and a use method thereof, and aims to solve the problems that the existing mold closing and upsetting device needs a product with two ends larger than the middle part, is unstable in forming, cannot naturally strip after mold closing and upsetting, increases resource loss and is inconvenient to use. The rotating shaft rotates in the machine body, and bevel gears used for transmission are fixed to the two ends of the rotating shaft; the die holder comprises a right die, a left die, a first cover plate, a second cover plate and a third cover plate, a third convex positioning groove is formed in the second cover plate, the die assembly upsetting structure function is natural, stripping can be achieved, power consumption is low, the field is reduced, maintenance is convenient, the setting cost is low, efficiency is high, and the die assembly upsetting structure can be completed in the equipment. And die assembly limiting and opening space avoiding are achieved, it is guaranteed that die assembly upsetting is smooth, and production of furniture connecting rods is facilitated.
Owner:黎东
Non-quenched and tempered 11.9-grade high-plasticity cold heading steel wire rod and production method
The invention particularly discloses a non-quenched and tempered 11.9-grade high-plasticity cold heading steel wire rod and a production method, and belongs to the technical field of ferrous metallurgy, Si, Mn, RE, B, Ti and other components are added into the wire rod, and the production method sequentially comprises the procedures of molten steel smelting, blank preparation, primary blank heating, primary wire rod rolling and wire rod cooling. A continuous casting billet with required components and proportions is obtained through the steps of smelting and continuous casting, the finish rolling temperature is 800-840 DEG C, the reducing and sizing rolling temperature is 800-840 DEG C, a wire rod is spun into a wire rod at the temperature of 820-850 DEG C, the wire rod obtained after spinning is directly immersed in a salt bath at the temperature of 350-400 DEG C for isothermal treatment, and all lower bainite structures are obtained. The steel wire rod has high strength, plasticity and toughness and high delayed fracture performance, the tensile strength of the fine wire is larger than or equal to 1150 MPa, the percentage reduction of area is larger than or equal to 68%, and the fine wire obtained after the steel wire rod is subjected to 30-35% drawing diameter reduction has the advantage of being free of cracking after 1 / 6-1 / 12 cold upsetting.
Owner:QINGDAO SPECIAL STEEL CO LTD +1
Method for controlling gripping in upset forging and system thereof
The present invention can optimally control the timing and the gripping force of a grip die for gripping a forging material in upset forging. When a forging material W is set in the grip mold, an AC servo motor of a grip mechanism is activated, and a crank shaft is rotationally driven to cause a grip ram 31 to be lowered. A grip upper die that is integral with the grip ram 31 is lowered to grip and fix the forging material W between the grip upper die and a grip lower die. After the grip ram 31 is lowered, the forging material W is gripped and fixed at a pressure equal to or lower than a preset pressure by means of a hydraulic cylinder chamber 36.
Owner:MANYO
Blank preparation device and preparation method of ceramic metal composite material bolt or nut
The invention relates to a blank preparation device and method for a ceramic metal composite material bolt or nut, the device comprises a female die, a female die inner cavity is arranged in the female die, the female die inner cavity is used for accommodating a bolt ceramic shell or a nut ceramic shell, and a cavity of the bolt ceramic shell and a cavity of the nut ceramic shell are internally provided with groove ring belts; a metal core heating part; a clamping moving part; the male die is used for upsetting and extruding the bolt metal inner core or the nut metal inner core into the cavity of the bolt ceramic shell or the nut ceramic shell, and the bolt metal inner core or the nut metal inner core is connected into the bolt ceramic shell or the nut ceramic shell in a plastic deformation mode. The upsetting structure is adopted for upsetting and extruding the bolt metal inner core or the nut metal inner core into the cavity of the bolt ceramic shell or the nut ceramic shell, the ceramic material is connected through plastic deformation of metal, and the prepared ceramic metal composite bolt or nut is excellent in comprehensive performance, high in bonding strength, high in material cleanliness and beneficial to application.
Owner:BEIJING HANGWEI JOINING TECHNOLOGY CO LTD
Preparation method of 5A05 round frame branch bud-shaped aluminum alloy die forging
The invention discloses a preparation method of a 5A05 round frame branch bud-shaped aluminum alloy die forging, and relates to the technical field of metal materials. The invention aims to solve the problem that the existing 5A05 round frame branch bud-shaped die forgings are not formed by die pressing and have folding defects in the preparation process of the existing 5A05 round frame branch bud-shaped die forgings. The method comprises the following steps: heating a cylindrical cast ingot in a furnace, and upsetting to obtain an upset forging stock; the upset forging stock is pre-forged after being heated, and a pre-forged blank is obtained; the pre-forged blank is subjected to corrosive washing and damage repairing, first-time die forging forming is conducted, and a die forging piece is obtained; and the die forging is subjected to corrosion washing and damage repairing, secondary die forging forming is carried out, corrosion washing and damage repairing and after-forging inspection are sequentially carried out, and the 5A05 round frame branch bud-shaped aluminum alloy die forging is obtained. According to the preparation method, the 5A05 round frame branch bud-shaped aluminum alloy die forging can be obtained.
Owner:NORTHEAST LIGHT ALLOY CO LTD +1
Residual-temperature-assisted multi-heat-source collaborative modulation welding device and welding method
The application provides a residual-temperature-assisted multi-heat-source collaborative modulation welding device and method, relates to the technical fields of laser welding and friction stir welding, and aims to solve the problems of easy forming defects and performance attenuation of welded aluminum-lithium alloy. The device outputs a composite heat source through a laser-arc composite heat source system to realize wire melting and stabilize the molten pool of the front deep penetration of the workpiece; a movement system controls the follow-up movement of a friction stir heat source system; a residual-temperature-airflow collaborative auxiliary temperature control system dynamically adjusts the temperature of the solid phase zone of the molten pool; a monitoring and sensing system collects physical field mode data in real time and uploads the data to a control system; a flexible tooling system is used for clamping the workpiece with variable curvature; and the friction stir heat source system applies dynamic shearing and mechanical upset forging force to the residual high-temperature zone on the back surface, so that the defects such as back surface collapse and burn-through of the weld of the workpiece with variable curvature are effectively improved. The residual-temperature-assisted multi-heat-source collaborative modulation welding method is applied to the residual-temperature-assisted multi-heat-source collaborative modulation welding device.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Steel bar linear friction welding device and using method
The invention discloses a steel bar linear friction welding device and a using method. The device comprises a machine tool platform and a power and control unit. The upset forging oil cylinder and the upset forging moving table are installed on the machine tool platform, the upset forging moving table is arranged on the upset forging moving table guide rail in a sliding mode, and the upset forging oil cylinder drives the upset forging moving table to move in the axial direction; the vibration oil cylinder fixing seat and the vibration oil cylinder are fixed on the machine tool platform, the vibration block is arranged on the vibration block guide rail in a sliding mode, and the vibration oil cylinder drives the vibration block to do reciprocating rectilinear motion. The upsetting clamping mechanism is arranged on the upsetting moving table and used for clamping a first steel bar; the vibration clamping mechanism is arranged on the vibration block and used for clamping a second steel bar; the moving direction of the upsetting oil cylinder is perpendicular to the moving direction of the vibration oil cylinder, so that linear friction is generated between the first reinforcing steel bar and the second reinforcing steel bar which are in end face contact. Efficient, precise and environment-friendly welding of large-diameter long steel bars and irregularly-shaped steel bars can be achieved.
Owner:FUZHOU JINLAN TECHNOLOGY CO LTD
Preparation method of high yield rate tc4 rod and tc4 rod
This invention relates to the field of titanium alloy bar forging, specifically to a method for preparing high-yield TC4 bars and the TC4 bars themselves. The method includes the following steps: Electrode preparation: mixing alloy raw materials according to the TC4 alloy composition with boron powder and pressing them into electrodes, wherein the amount of boron powder added is 0.15 wt.%~0.5 wt.% of the total weight of the alloy raw materials; Ingot preparation: melting the electrodes to obtain an ingot; Two-stage extrusion blanking: subjecting the ingot to two extrusion blanking processes, with quenching treatment after each extrusion; Reversing upsetting forging: heating the quenched extruded blank and performing reversing upsetting forging to obtain a forged blank; Finished product extrusion: heating the forged blank and extruding it to obtain TC4 bars. The method of this invention, by adding boron powder to the raw materials and using a two-stage extrusion blanking + forging / extrusion composite forming process for bar production, obtains TC4 bar products with low texture and high microstructure uniformity.
Owner:CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
Upsetting force balance mechanism for friction welding machine
The utility model discloses an upsetting force balancing mechanism for a friction welding machine, which comprises a machine tool body, one end of the top surface of the machine tool body is fixedly connected with a balancing mechanism rear wall, the other end of the top surface of the machine tool body is provided with a spindle box, the center of the balancing mechanism rear wall is provided with a main pushing oil cylinder, and the top surface of the machine tool body is connected with a sliding table in a sliding manner; one end of the balance mechanism rear wall is connected with a balance pull rod in a penetrating mode, and the two ends of the balance pull rod are connected with locking nuts. By means of the design of the stress balance structure, upsetting force can be effectively and evenly distributed in a symmetrical structure of equipment, stress deviation is reduced, the risk of structural deformation and damage is reduced, it is guaranteed that pressure exerted on a welding piece is even during welding, the situation of uneven force is avoided, and the stability and reliability of a mechanical structure are remarkably improved.
Owner:HARBIN ZHONGREN MASCH EQUIP CO LTD
Method for producing high-purity aluminum-silicon-copper target blanks
The application belongs to the technical field of metal processing, and discloses a preparation method of high-purity aluminum-silicon-copper target blank, which comprises the following steps: sequentially heating and pretreating, upsetting forging, multi-direction rolling, heat treating high-purity aluminum-silicon-copper cast ingot, and obtaining the high-purity aluminum-silicon-copper target blank. The cast ingot obtained through the above method has uniform internal structure, uniform grain size distribution and no cracks. Moreover, the process provided by the application is simple, short in completion time, low in cost, and beneficial to industrialized popularization and application.
Owner:PIONEER FILM MATERIALS (ANHUI) CO LTD
Method and apparatus for manufacturing tripod with shaft
To provide a method for manufacturing a tripod with a shaft capable of surely forming a desired shape by plastic flow without requiring excessive working load in cold closed forging by pushing in a punch from one direction.SOLUTION: In a step of forming a tripod with a shaft from a columnar material by upset forging in which pressing is performed from one direction, a closed mold including a first cavity corresponding to a shaft portion and second cavities corresponding to a plurality of leg portions is configured to be movable forward and backward in a pressing direction, the material is set in the first cavity so that the dividing surface of the closing mold and the center of the material in the pressing direction are at different positions, and the closing mold is moved following the movement of the plurality of leg portions with the progress of the upset forging so that the plane including the third axis, which is the central axis of the plurality of leg portions being formed, and the dividing surface of the closing mold overlap each other.SELECTED DRAWING: Figure 2
Owner:SANGO CO LTD
A method of upsetting tungsten and its alloys
The application discloses a method for upsetting forging of tungsten and its alloy, and relates to the field of forging technology, which comprises the following steps: loading a blank into an upsetting sleeve and welding and sealing; first heat treatment of the upsetting blank; then upsetting forming with a deformation of 15-35%; second heat treatment of the blank after the upsetting forming; then upsetting forming with a deformation of 20-35%; third heat treatment of the treated blank, then upsetting forming with a deformation of 10-20%; fourth heat treatment of the blank, then upsetting forming with a deformation of 5-15%, and then repeating the heat treatment and the upsetting forming until the finished product is qualified; annealing heat treatment of the treated blank; and finally removing the sleeve to obtain the upsetting finished product; the blank of tungsten and its alloy is loaded into the sleeve, so that the cracking of the blank of tungsten and its alloy caused by temperature drop, atmosphere and uneven deformation is effectively avoided, and the yield of the finished product is improved.
Owner:NANCHANG UNIV +1
Forging forming method for high-temperature alloy blade of large gas turbine
The forging forming method for the high-temperature alloy blade of the large gas turbine is suitable for controlling thermal deformation in the blade machining process and comprises the steps that S1, a high-temperature alloy blank is selected, and the blank is subjected to rough turning machining according to the design requirement of the blade so that a bar with end fillets can be formed at the two ends; s2, the bar is subjected to upset forging heating and formed at a time through an upset forging die, and an upset-forged blank is formed; s3, according to design requirements, a lower tenon and a blade body of the upset blank are subjected to turn-milling machining to the target size, a glass lubricant is sprayed, and heating is conducted; s4, a small head of the heated upset blank is flattened in a flattening cavity of a pre-forging die, then the blank is turned over by 90 degrees, a blade body is flattened in the pre-forging cavity, and a blank piece is formed; s5, oxide skin on the surface of the blank is removed, a lubricating agent is sprayed, and it is guaranteed that the surface of the blank is smooth; s6, forming leaves; and S7, the blade is subjected to deburring, heat treatment and sand blasting treatment and is detected, and the machining efficiency of the blade is improved.
Owner:AECC AERO SCI & TECH CO LTD
Tail upsetting device for anchor rod machining
The utility model discloses a tail upsetting device for anchor rod machining, and relates to the technical field of anchor rod machining. The tail upsetting device for anchor rod machining comprises a combustion furnace, a feeding port is formed in the outer surface of the left end of the combustion furnace, and a conveying device is arranged at the left end of the combustion furnace. The movable table slides to drive a clamping block on the movable table to clamp the anchor rod to slide rightwards to a feeding opening formed in the outer surface of the left end of the combustion furnace, the tail of the anchor rod is inserted into the feeding opening in a sliding mode, the combustion furnace is started, upsetting forging is conducted on the tail of the anchor rod, after upsetting is completed, a screw rod drives the movable table to slide towards the left end, and the movable table slides to the leftmost end; the first telescopic rod and the second telescopic rod drive the clamping blocks to contract outwards, so that the upset anchor rod falls onto the upper surface of the moving table and slides down from the slope of the moving table, manual taking down is not needed, the anchor rod after sliding down has a certain cooling time, workers are prevented from being scalded, risks are avoided, and the working efficiency is improved.
Owner:HENAN RUIGONG MACHINERY MANUFACTURING CO LTD
Flashless crack type inertia friction welding device and method
The invention belongs to the technical field of inertia friction welding of high-temperature alloy thin-walled parts, and particularly relates to a flash-crack-free inertia friction welding device and method. The device comprises an inner metal ceramic tube, an outer metal ceramic tube, a vibrating rod, a heater, a rotating disc and a mandrel, the heater is located in the mandrel, the inner side and the outer side of the upset forging side workpiece are in interference fit with an inner metal ceramic pipe and an outer metal ceramic pipe respectively, the tail ends of the inner metal ceramic pipe and the outer metal ceramic pipe extend to the outer side of the upset forging side workpiece in the axial direction to form an annular friction welding operation area, friction welding is conducted in the annular friction welding operation area, and a welding seam is restrained through the inner metal ceramic pipe and the outer metal ceramic pipe; the rotating disc is arranged on the outer side of the outer metal ceramic pipe in a sleeving mode, a plurality of vibrating rods are arranged on the rotating disc, the rotating disc drives the vibrating rods to dynamically follow the track of the welding seam, and the vibrating rods conduct online synchronous grain refining operation on the welding seam through vibration. According to the method, uniform refining of the weld grain structure is achieved, flash formation and crack initiation are effectively restrained, and the forming precision and the production efficiency are improved.
Owner:DALIAN UNIV OF TECH
Large high-temperature alloy bar for ultra-fine grain gas turbine and forging method of large high-temperature alloy bar
PendingCN121575264AIncreasing energy efficiencyHeating/cooling devicesTemperature controlHeating time
The invention discloses a high-temperature alloy large bar for an ultra-fine grain gas turbine and a forging method of the high-temperature alloy large bar, and belongs to the technical field of high-temperature alloy preparation. According to the method, for high-temperature alloys such as GH4169, a composite nucleation refiner composed of yttrium oxide (YO) and boron carbide (BC) is added in the vacuum induction smelting stage, and through the steps of optimized homogenization treatment, multi-heating-number variable-temperature upsetting and drawing forging, temperature-controlled rolling forming and the like, grain ultra-fining and high structure uniformity of the section of the large bar are achieved in a synergistic mode. The method has the advantages that the average grain size of the prepared large bar with the diameter of 350-450 mm reaches 8.0-9.0 grade, the grain size grade difference is smaller than or equal to 1.0 grade, the transverse mechanical property and the high-temperature creep property of the material are remarkably improved, the lasting fracture time at the temperature of 650 DEG C is longer than 280 h, the percentage elongation after fracture is larger than 18%, the problem of high flaw detection clutter caused by coarse grains is effectively solved, and flaw detection meets the AA-grade requirement.
Owner:SICHUAN JIANGYOU LIUHE STEAM TURBINE MATERIAL
Upset forging sample cooling device
The utility model relates to the technical field of cooling devices, in particular to an upset forging sample cooling device which comprises a main body mechanism, a cooling mechanism, a functional mechanism and an auxiliary mechanism, the cooling mechanism is located in the main body mechanism, the functional mechanism is located on one side of the main body mechanism, and the auxiliary mechanism is located at the bottom end of the main body mechanism. According to the utility model, the contact area between the sample and the cooling device is reduced, and the cooling effect is optimized, so that the accuracy of a hot upsetting test is improved, the subsequent cleaning work of oxide skin in the test is reduced, the design of the cooling frame is greatly improved, and a traditional plane steel plate is upgraded into a wavy net-shaped heat dissipation platform. According to the innovative design, the contact area of the sample and the cooling frame is obviously reduced, and the stability of the device is enhanced. The area of the grid holes is accurately controlled to be 625 mm < 2 >, a guide steel plate with the inclination of 60 degrees is designed below the cooling frame, and oxide skin falling off from a sample can slide into a scrap dumping box along the guide steel plate below the guide steel plate.
Owner:SHOUGANG CHANGZHI IRON & STEEL
A multi-directional asynchronous loading upsetting forging method for special-shaped shaft components
ActiveCN115430800BForging/hammering/pressing machinesEngine componentsAbnormal shapedMechanical property
The present invention provides a multi-directional asynchronous loading upsetting forging method for a special-shaped shaft component, comprising the following steps: blanking; heating, heating the blank obtained in step 1 to 1000°C and holding the temperature for 40±10 minutes; placing the heated blank into a mold, closing the mold, using a loading device to perform asynchronous loading upsetting forging on the blank according to a set loading curve, and placing the formed component in air for cooling; wherein the loading device includes an axial left punch, a radial punch, and an axial right punch located at the upper portion of the mold cavity, with a push rod provided below the radial punch. The present invention can form large-sized, complex special-shaped shaft components using a simple process. The resulting components have high mechanical properties and good internal quality. In particular, the problem of low grain size in the center portion of special-shaped shaft components prepared by existing methods is solved. The method also has the advantages of high material utilization, short production cycle, low production cost, and ease of operation.
Owner:SOUTHWEST TECHNICAL ENGINEERING RESEARCH INSTITUTE OF CHINA SOUTH IND GROUP
A method for preparing a beta state TC17 titanium alloy bar
The present application belongs to the technical field of titanium alloy material processing, and particularly relates to a preparation method of beta-state TC17 titanium alloy bar. The TC17 titanium alloy ingot is subjected to open-die forging, and after high-temperature heating and holding, is subjected to first three-dimensional elongation forging. Then, after high-temperature heating and holding, upsetting and diagonal elongation forging are performed, and meanwhile, the relative radial direction of the blank to the ingot is changed. After high-temperature heating and holding, second three-dimensional elongation forging is performed. Then, after low-temperature heating and holding below the phase transition point, upsetting and elongation forging are performed. After heating in a furnace and heating to medium temperature above the phase transition point, upsetting forging is performed. After air cooling to room temperature, elongation forging is performed at low temperature below the phase transition point. After heating in a furnace and heating to medium temperature above the phase transition point, elongation forging is performed. After cooling, beta-state TC17 titanium alloy bar with a diameter of Φ250mm-Φ350mm is obtained. The process has a short production flow and a high yield, and can relatively quickly obtain beta-state TC17 bar with fine and uniform beta grain structure.
Owner:西部超导材料科技股份有限公司
A high return ratio GH4099 alloy large bar fine grain forging process
The present invention discloses a fine-grain forging process for large GH4099 alloy bars with a high return ratio, comprising the following steps: A) heating a prepared bar blank to 1330°C, holding the temperature for 5 hours, and then cooling the temperature to 650°C at a cooling rate of 15°C / min; B) heating the bar blank to 1160°C and performing octagonal forging with a forging deformation of 30% to 35%; C) cooling the bar blank to 1150°C and performing a first upset forging with a forging deformation of 45% to 50%; D) cooling the bar blank to 1130°C and performing a second upset forging with a forging deformation of 40% to 45%; and E) cooling the bar blank to 950°C at a rate of 60°C / min, then cooling the bar blank to 500°C at a rate of 20°C / s, and performing a light forging finish. This invention can overcome the shortcomings of existing technologies, refine the core grains, and improve the overall microstructure uniformity of the bar.
Owner:AVIC SHANGDA METAL REGENERATION TECH