56 results about "Radial forging" patented technology

This invention discloses a low-nickel, high-nitrogen super austenitic stainless steel, its billet, a billet preparation method, and its applications. The chemical composition of the stainless steel is: C≤0.020%, Si≤0.60%, Mn≤0.80%, P≤0.025%, S≤0.020%, Cr: 19.50~20.50%, Ni: 16.50~17.50%, Mo: 6.0~6.3%, N: 0.45~0.55%, Cu: 0.5~1.0%, and ( w Ni + w Cu + w N )≥17.5, ( w Gr +3.3× w Mo +16× w N ≥45. This invention, through optimized control of chemical composition and a process design of initial rolling + homogenization treatment + radial forging + online solution treatment, enables the low-nickel, high-nitrogen super austenitic stainless steel to exhibit excellent corrosion resistance, significantly reducing alloy and manufacturing costs while meeting the basic performance requirements of super austenitic stainless steel.

The application discloses a manufacturing method of an ultra-low-temperature high-strength non-magnetic austenitic stainless steel rod, which comprises the following steps: forming a fine-grain protective layer on the surface of a steel ingot by radial forging, small-deformation high-frequency forging and breaking down, so as to reduce the cracking risk in the fast forging process; increasing the forging ratio by fast forging, upsetting and elongating; and making the structure of the center of the steel ingot recrystallize to a certain extent; and finally, forming the steel rod by radial forging, large-deformation low-frequency forging and breaking down, so that dynamic recrystallization occurs in the whole cross-section of the steel rod, and uniform equiaxed crystals are formed, thereby solving the problems of multiple forging times, easy surface cracking and poor structure uniformity of the ultra-low-temperature high-strength non-magnetic austenitic stainless steel rod.

A method for manufacturing an equiaxed crystal target material, comprising the following steps: a metal bar is made into a forged base material by a radial forging process; the forged base material is made into a first plate material by a rolling process and a plate forging process, the rolling process is rolling along the axial direction of the forged base material; a second plate material is obtained by reciprocating an equal channel angular extrusion process on the first plate material with an equal channel angular extrusion die, the cumulative average equivalent strain of the second plate material is greater than 10, wherein the feeding direction of the first plate material into each equal channel angular extrusion die is the same as the rolling direction of the forged base material; and an annealing and recrystallization heat treatment process is performed on the second plate material to obtain an equiaxed crystal target material. Through the above steps, an equiaxed crystal target material with a grain size of not greater than 20 μm can be obtained for use in the semiconductor industry.

The utility model relates to the technical field of hammer heads of radial forging machines, in particular to a hammer head of a radial forging machine, which comprises a connecting part, a base body and a heightening layer. Wherein the connecting part is positioned at the bottom of the hammer head and is used for connecting the hammer head with the radial forging machine. The base body is fixedly connected between the connecting part and the heightening layer. The heightening layer is arranged on the side, away from the connecting part, of the base body and used for heightening the working layer, so that the hammer head of the radial forging machine can be used for machining materials with smaller diameters. Compared with the existing hammer head of the radial forging machine, the hammer head of the radial forging machine has the advantages that a layer of heightening layer is additionally arranged at the end part of the existing hammer head of the radial forging machine, so that materials with smaller diameters can be processed, alignment is easier in a chamfering process, and the risk of hurting people due to broken fragments caused by unbalanced loading stress of forged materials is reduced. And moreover, the heightened layer can be formed by welding an offline old hammer head of the radial forging machine on the base body by using a laser cladding method, so that the cost is low, the manufacturing period is short, and the smooth production can be ensured.

This invention relates to a method for preparing niobium rods with uniformly broken grains. First, alloy raw materials are melted and cast to obtain an ingot, which is then preheated to obtain a first billet. Next, the first billet undergoes multiple axial forgings and a first heat treatment to obtain a second billet. Then, the second billet undergoes surface treatment to remove surface defects and is radially forged to obtain a third billet. Subsequently, the third billet undergoes oxidation treatment to form an oxide film on its surface, protecting it. The third billet with the oxide film is then subjected to multiple roll forming processes to obtain a first rod. Next, the first rod is rotary forged and polished to obtain a second rod. Finally, the second rod undergoes a second heat treatment to obtain a finished rod. Through multiple axial forgings, radial rotary forgings, and roll forming processes, the resulting finished rod has a uniform and fine grain structure, a grain size GS=7-9, an elongation ≥40%, and a hardness (HV / 2.9N) ≤60.

The invention relates to a method for forging a forged workpiece (2) in a forging press (3), preferably designed as an open die forging press or a radial forging press, the method comprising manipulating the forged workpiece (2) by means of a workpiece manipulator (1) having a workpiece clamp (5), the workpiece clamp (5) having a chuck (6), the chuck defines a clamping axis (S) for the forging workpiece (2), and wherein the workpiece manipulator (1) performs a linear translational movement together with the forging workpiece between the stamping strokes of the forging press (3), the method further comprises determining the position of at least one end (4) of the forged workpiece (2) clamped into the workpiece clamp (5) on the clamping axis (S) relative to a reference point on the forging press (3), in particular relative to a mold of the forging press (3), by means of at least one measuring system arranged on the workpiece clamp (5) or on the workpiece clamp (5). The invention also relates to a workpiece manipulator (1) for the method according to the invention.

This invention relates to the field of composite sealing ring molding technology, and more particularly to a composite sealing ring suitable for extreme temperature alternating conditions and its molding method. The method includes: optimizing the layer thickness ratio of the sealing ring; determining the structural dimensions based on the layer thickness ratio and the standard thickness of the sealing ring to fabricate an annular metal support skeleton; pre-treating the metal support skeleton; mixing metal powder and non-metal powder made from the metal support skeleton material in different proportions to obtain a transition layer, and laying it on the inner side of the metal support skeleton in a gradient manner; laying the mixed wear-resistant layer powder on the inner side of the transition layer; closing the mold for integrated pressing and sintering; after sintering, performing radial forging treatment; performing cryogenic treatment and wear resistance testing, and adjusting the set parameters based on the test data. The composite sealing ring prepared by this invention has a compact structure, which can ensure structural stability and sealing performance under frequent extreme temperature alternating conditions.

The invention provides a method and device for strengthening the surface of a large-length-diameter-ratio rotary body component. The method comprises the following steps that A, the large-length-diameter-ratio rotary body component is clamped to a rotary clamping system; b) axially moving the rotary body component with the large length-diameter ratio in an autorotation state, and sequentially passing through an air cannon radial forging area and a nitrogen ion heat treatment area; and C) after the nitrogen ion heat treatment is finished, cooling to room temperature in a protective atmosphere to obtain the surface-strengthened revolution body component with the large length-diameter ratio. The air cannon is used for replacing a mechanical forging hammer, mechanical damage is avoided, and the method is particularly suitable for thin-wall and inner hole strengthening; forging and nitriding are continuous, a dislocation / grain boundary network generated by forging serves as a rapid nitrogen diffusion channel, and the infiltration speed and the infiltration layer binding force are remarkably improved. And forging temperature rise is directly used for subsequent nitriding, energy is saved, consumption is reduced, and tissue change caused by secondary heating is avoided. And the design of rotation, axial movement and array cannon groups is adopted, so that the surface strengthening uniformity of the super-long workpiece is ensured.

The invention belongs to the technical field of metal part machining and manufacturing, and provides a diffusion welding method and device for a rotary part, and the method comprises the steps that an inner cylinder and an outer cylinder are provided; machining the outer surface of the outer cylinder to form an outer conical surface; the outer cylinder sleeves the inner cylinder; providing an outer conical cylinder tool, wherein the inner surface of the outer conical cylinder tool is provided with an inner conical surface matched with the outer conical surface; the outer conical cylinder tool is sleeved with an outer cylinder; and the outer cone cylinder tool is axially pressed, the cone sleeve is matched with the radial forging and pressing outer cylinder, the outer cylinder and the inner cylinder are combined in a diffusion welding mode, and the rotary body part is obtained. The taper sleeve radial forging and pressing technology from outside to inside is adopted to be matched with a special tool system, axial pressure can be efficiently converted into uniform radial welding pressure, and tight combination of the inner cylinder and the outer cylinder is achieved. The design of the first ring groove on the surface of the inner cylinder can increase the diffusion contact area and form mechanical interlocking, and further strengthen the bonding performance. The modularized special tool system can ensure accurate positioning and rapid clamping of the parts, and the production efficiency and the batch stability are remarkably improved.

The application discloses a kind of radial forging machine hydraulic frequency conversion systems, including the eccentric shaft being installed on main frame, eccentric shaft is connected with forging cylinder, forging cylinder, frequency conversion piston cylinder and main plug-in valve are communicated with integrated valve block internal oil channel, main plug-in valve and pilot servo cylinder are connected, the piston rod of pilot servo cylinder is electrically connected with displacement sensor.Main plug-in valve and pilot servo cylinder form quick discharge oil channel, so that forging cylinder does not rotate with eccentric shaft and extend, reduce the forging frequency of forge, adapt to the large cross-section billet large deformation forming requirement;In low-frequency forging mode, the time interval of hammer head is increased, and longer adjustment time is provided for the axial and rotary feed of the forged piece, the frequency is reduced by half, the forging interval time is also multiplied, under the same axial feed speed and rotary speed, the axial feed amount and rotation amount are also multiplied.

This invention relates to the field of radial forging equipment technology, and more particularly to a clamping mechanism for slender components in radial forging equipment. The mechanism includes a drive disk and four fixed teeth. All four fixed teeth are mounted on the surface of the drive disk, and the drive disk can drive the four fixed teeth to move synchronously radially along the drive disk. One end of each fixed tooth has a countersunk hole. A high-temperature plastic plate is mounted on the inner side of the fixed tooth through a corresponding screw in the countersunk hole. A cooling box is mounted on the side of the fixed tooth near the high-temperature plastic plate, and the cooling box is in contact with the high-temperature plastic plate. A cooling component for cooling the cooling box is disposed inside the fixed tooth, and a cleaning component is also installed inside the fixed tooth. This invention, by setting a high-temperature plastic plate, achieves adaptive clamping at high temperatures, efficient and coordinated heat dissipation, and automatic cleaning of the cooling component, thereby improving forging accuracy and production efficiency, reducing equipment maintenance costs, and adapting to the forging needs of slender components under different working conditions.

A sampling material collecting device applied to a radial forging machine comprises a sample material conveying box, the sample material conveying box is arranged on the rear portion of a fixed sliding rail, a push rod is arranged at the tail of the sliding rail, and a material taking assembly is arranged on the side of the path of the sliding rail. The push rod pushes the sample conveying box to the position of the material taking assembly along the sliding rail, the material taking assembly collects the sample conveying box, samples are placed in the sample conveying box and then sent back to the sliding rail, the material changing box carrying the samples continues to be forwards pushed to a hoisting area along the sliding rail through the push rod, and the crane hoists the material changing box to a sampling detection area. The utility model solves the production bottleneck problem caused by the existing sampling link, thoroughly eliminates the potential safety hazard of manually carrying the red hot sample material, greatly improves the material collection and circulation speed, ensures the continuous and stable release of the productivity of the radial forging machine production line, and effectively reduces the dead time of the production line due to the close connection of all links and the automatic operation. The yield in unit time is obviously improved.

This invention discloses a method for producing ultra-large diameter duplex stainless steel radial forged tube blanks, comprising: selecting an 8.4t square billet as the billet material, heating the square billet at a temperature of 1250±10℃ for a soaking time of 2.0~8.0h, and then upsetting it into a round billet with a diameter of φ900~1000mm after exiting the furnace; radially forging the round billet into a tube blank with a diameter of φ500~600mm, wherein during the radial forging process, the heating temperature is 1250±10℃ for a heating time of 2.0~4.0h, the initial forging temperature is 1050~1150℃, and the radial forging adopts a three-stage forging process, with the forging deformation rates of the first to third stages being 5~8%, 10~15%, and 20~30%, respectively; and directly annealing the tube blank in a furnace at a temperature of 1050±20℃ for a time of 6~12h, and immediately water cooling it in a water tank after exiting the furnace. This invention marks the first successful production and qualified delivery of ultra-large diameter forged tube blanks of S32205 series duplex stainless steel with a diameter of φ500~600mm. The specifications, surface and various properties of the finished ultra-large diameter forged tube blanks of duplex stainless steel meet the high requirements of marine mining platforms for materials, providing a solution for the preparation and production of ultra-large diameter forged tube blanks of duplex stainless steel.

This invention discloses a rod-type spring buffer mechanism for a radial forging chuck, comprising an inner sleeve, a worm gear, a worm, and several circumferentially distributed spring rods. One end of each spring rod is fixed to the tailstock, and the other end is connected to the worm gear. This mechanism places the buffer point between the worm gear and the inner sleeve, utilizing the bending deformation of the spring rods to absorb forging impact energy. This invention offers advantages such as strong high-frequency adaptability, good transmission system protection, and adjustable buffering force. Furthermore, this invention discloses two optimized embodiments: a spring rod structure with fixed supports at both ends and a layered buffer structure with added compression spring groups; a switching mechanism that allows switching between the two buffering methods; and a continuously variable speed control system for adapting to high-frequency impacts, further improving the performance and reliability of the mechanism.

The utility model discloses a horizontal radial forging machine, which relates to the technical field of radial forging equipment and comprises a shell, a hammer seat and a hammer head, baffles are connected to two sides and the outer surface of the hammer seat, bolts penetrate through two sides of the baffles, threaded sleeves are fixed outside the bolts, and the top of the hammer head is respectively connected with a limiting block and a supporting block. Through the arrangement of the plug pin, the threaded sleeve, the limiting block and the supporting block, the limiting block and the supporting block are inserted into the hammer seat, then the plug pin transversely penetrates through the hammer seat, and the threaded sleeve is connected with the limiting block by rotating the plug pin so as to limit the limiting block, so that the installation operation is completed; the limiting block is matched with the supporting block to prevent the hammer from moving up, down, left, right and backward and falling off, the bolt is matched with the threaded sleeve to prevent the hammer from falling off forwards, and rapid installation is facilitated; during dismounting, the bolt is rotated reversely, so that the threaded sleeve is separated from the limiting block, and then the bolt is pulled out, so that the hammer head can be directly taken down from the hammer seat; the structure is simple, and dismounting is fast and convenient.

The present application belongs to the field of corrosion-resistant iron-nickel-based alloys. More particularly, it relates to a method for eliminating precipitated phases of N08028 alloy after forging without solid solution. The method comprises the steps of electrode preparation, crystallizer preparation, polishing the copper bottom plate of the bottom water tank using a polishing device, placing four arc initiators at the center of the carbon steel plate, filling argon into the crystallizer, preparing slag, controlling the steady-state melting rate during smelting, using fast forging + radial forging for forging, and directly water cooling after radial forging without solid solution, so that the total content of precipitated phase intermetallic compound phase, nitride phase and carbide phase is not more than 1.0%, and the content of sigma phase is not more than 0.2%.

The application discloses a kind of aluminum matrix composite radial forging methods, belong to metal material processing field.The aluminum matrix composite blank is placed in heating furnace, with furnace temperature rises to 350~500 DEG C and is kept for 6~16 hours, blank is transferred to radial forging machine and is carried out radial forging, blank is turned over, and the blank is forged, immediately aluminum matrix composite blank is transferred to 350~500 DEG C heating furnace and is kept for 6~16 hours, repeat step S2 and S3, until blank is forged to the diameter size required.The application adopts the radial forging method of small deformation multiple deformation, realizes similar extrusion effect, the accurate control of blank diameter and the uniform distribution of deformation and microstructure in the radial direction of blank, effectively improves the uniformity of structure and product performance stability, and can realize high-quality, high productivity and low cost preparation of aluminum matrix composite rod for aluminum matrix composite.

This invention discloses a high-strength and high-toughness TA11 titanium alloy fine-grained rod and its preparation method, belonging to the field of titanium alloy material processing technology. The method first involves forging an ingot through seven heats to obtain a forged billet, followed by high-speed stepped cooling through four heats and energy-controlled rolling in the final heat to obtain the finished rod. The finished rod has a cross-sectional diameter of 40–45 mm and an average grain size of 5–10 μm in both the transverse and longitudinal directions. This invention significantly reduces the number of heats required in the traditional "free forging + radial forging" process from approximately 20 heats to 11 heats by using a "rolling instead of forging, forging and rolling combined" approach. In particular, the high-speed rolling in the first three heats of step two significantly shortens the material's residence time in the high-temperature zone, reducing oxidation loss and surface crack formation, and increasing the overall yield by more than 15% compared to the traditional process.

The invention relates to a connector forging device of a geothermal well drill rod, and belongs to the technical field of forging equipment, the connector forging device structurally comprises a vehicle body, and the vehicle body is provided with a clamping unit, a radial forging machine, an unlocking plate and a switching unit; the clamping unit is arranged at one end of the vehicle body in a sliding mode, the radial forging machine is fixedly arranged on the vehicle body and located on one side of the clamping unit, the switching unit is arranged on the vehicle body in a sliding mode and located on one side of the radial forging machine, and the unlocking plate is fixedly arranged at the other end of the vehicle body. The switching unit comprises a supporting frame and a switching shell. One end of the supporting frame is slidably arranged on the vehicle body, and the switching shell is rotationally arranged at the other end of the supporting frame. A sliding groove is formed in the middle of the switching shell, and a profiling core rod is arranged in the sliding groove in a sliding mode. A driving structure is arranged in the switching shell and is used for driving the profiling core rod to slide; the forging method has the technical effect of efficiently adapting to the forging requirements of the differentiated structures of the male part and the female part.

The invention discloses a mechanical tipping mechanism of a large radial forging machine main machine, and relates to the technical field of forging equipment, a stand column is fixedly connected with a bottom plate, an adjusting plate is arranged below the bottom plate, the adjusting plate is fixedly connected to the stand column, the adjusting plate is provided with a turnover assembly, and the bottom plate is provided with a groove position for containing the turnover assembly to move. The upper portion of the overturning assembly is located on the upper side of the bottom plate, the overturning assembly is used for adjusting the to-be-forged piece, and an adjusting assembly is arranged between the adjusting plate and the overturning assembly and used for adjusting the height of the overturning assembly. During radial forging operation, a to-be-forged piece is placed on a base plate station, a forging hammer on a top plate at the top of a stand column can conduct radial forging, and according to the forging requirements of different parts of a long-shaft workpiece, an overturning assembly on an adjusting plate can clamp and rotate the workpiece and drive the workpiece to move axially at the same time, so that angle switching and position adjusting of the workpiece are completed; forging of different areas is achieved, and the problems that a traditional radial forging machine is incomplete in covering of long workpiece forging and uneven in forging effect are solved.

The application discloses a high-efficiency and low-cost TC4 titanium alloy fine-grain rod preparation method, which precisely controls the microstructure evolution in the hot working process of the rod through a mode of 'rolling instead of forging and forging-rolling combination', and finally obtains the TC4 titanium alloy fine-grain rod with uniform and fine microstructure and excellent performance through three times of ingot breaking and forging and four times of low-temperature and low-speed large-deformation rolling forming. The TC4 titanium alloy fine-grain rod prepared by the application reaches a leading level in the uniform and fine transverse and longitudinal microstructure. The application breaks through the difficulties in the forging-rolling combination process and the microstructure regulation, reduces the preparation process from about 20 times of the traditional radial forging process to four times of rolling, and provides a high-efficiency and low-cost TC4 titanium alloy fine-grain rod preparation method.

This invention discloses a high-alloy high-performance rotary guide component and its manufacturing method, belonging to the field of stainless steel technology. It solves the problems of poor microstructure uniformity and inability to simultaneously achieve mechanical properties and stress corrosion resistance in existing rotary guide components. The manufacturing method includes: smelting molten steel; preparing ingots; forging the ingots into steel billets using a high-speed forging machine after they are tapped from the furnace; heating and holding the steel billets; forging the steel billets into intermediate billets using a radial forging machine; water cooling the intermediate billets; forging the water-cooled intermediate billets a second time using a radial forging machine, followed by air cooling to obtain finished steel billets; straightening, machining, and shot peening of the finished steel billets to obtain rotary guide components; the composition of the rotary guide components, by mass percentage, includes: 18.00% ≤ Cr < 28.00%, 3.00% ≤ Mo ≤ 6.00%, 14.00% ≤ Ni ≤ 20.00%, 3.00% ≤ Mn ≤ 8.00%, Si ≤ 0.4%, Nb ≤ 0.25%, P ≤ 0.025%, S ≤ 0.02%, C ≤ 0.03%, N ≥ 0.3%, with the balance being Fe and other unavoidable impurities. The rotary guide components of this invention have fine and uniform grains and excellent mechanical and corrosion resistance.

A method for automatic pass schedule calculation during forging, in particular radial forging, of stepped shafts made of metal workpieces, in particular steel, in a forging machine, preferably a radial forging machine with at least four forging tools arranged around the circumference of the workpiece, which are set up and adapted for simultaneous forging the workpiece and / or the stepped shaft, includes: entering starting parameters for the forging process, preferably radial forging process, into a pass schedule calculation program; specifying target parameters for the forging process, preferably radial forging process; and calculating, by the pass schedule calculation program, based on these start and target parameters, a pass plan or calculated a forge sequence. A control and / or regulation unit and a forging machine for carrying out the method are disclosed.

The invention relates to the technical field of composite sealing ring forming, in particular to a composite sealing ring suitable for the extreme temperature alternating working condition and a forming method of the composite sealing ring. Determining the structure size based on the layer thickness ratio and the standard thickness of the sealing ring to manufacture an annular metal supporting framework; the metal supporting framework is pretreated; mixing metal powder made of a metal supporting framework material with non-metal powder according to different proportions to obtain a transition layer, and laying the transition layer on the inner side of the metal supporting framework in a gradient laying mode; the mixed wear-resistant layer powder is laid on the inner side of the transition layer; the mold is closed for integrated pressing and sintering; after sintering is completed, radial forging treatment is conducted; and subzero treatment and abrasion resistance testing are conducted, and set parameters are adjusted based on test data. The prepared composite sealing ring is compact in structure, and the structural stability and the sealing performance under the multi-frequency extreme temperature alternating working condition can be ensured.

The present disclosure relates to a hot working method for stainless steel bars, comprising: step (1) heating a steel ingot at a heating temperature in a range from 1200° C. to 1270° C.; step (2) subjecting the heated steel ingot to radial forging and cogging down according to a total compression ratio greater than 3 to obtain a square billet; step (3) heating the square billet at a heating temperature in a range from 1200° C. to 1270° C.; and step (4) subjecting the heated square billet to hot rolling to obtain a bar. The processing method of the present disclosure can avoid the quality defect of surface crack while ensuring production efficiency by optimizing the process flow and controlling key process parameters, so that niobium-containing high-alloy austenitic heat-resistant stainless steel bars with good surface quality and structure can be prepared.

The invention discloses a module combined type four-hammerhead radial forging machine. The module combined type four-hammerhead radial forging machine comprises a power unit, a semi-open type gearbox, a split type forging box and an executing mechanism. Through series connection design of half-open gear box unit tooth systems, one set of power input and four-shaft synchronous output can be achieved, a forging executing mechanism in a forging box is driven, and four-direction high-frequency radial forging is achieved. Due to the semi-open design, the convenience of installation, inspection and maintenance is improved; the unit box body frame of the forging box adopts a split nesting principle, so that compared with the traditional casting and welding box body, the processing difficulty, precision, quality and cost are effectively improved, and the operation and maintenance difficulty is reduced. And a telescopic heat insulation protection device is arranged, so that the guiding durability of the hammer rod is improved. In addition, rectangular threads are adopted for hammer rod connection of the forging executing mechanism, the position in the forging process is reliable, the meshing length can be adjusted, the forging range can be adjusted, and the application range is greatly widened.

The application provides a 120Mn13 high manganese steel square steel forge piece forging method, controls deformation temperature and deformation amount to expand a plastic deformation temperature range of the 120Mn13 high manganese steel square steel forge piece, reduces an edge crack tendency of the forge piece, improves surface quality, refines austenite grains, realizes a 120Mn13 high manganese steel square steel forge piece forging forming process, and comprises the following steps: 1) heating; 2) radial forging of round steel; 3) reheating; 4) radial forging of square steel; and 5) air cooling after forging. The method is simple and convenient to operate, does not need to add forging equipment, solves the problem that 120Mn13 high manganese steel cannot be forged due to poor hot workability, widens the content range of raw materials and the deformation temperature range of forging, reduces smelting difficulty and production cost of the raw materials, solves the internal porosity problem of the cast 120Mn13 high manganese steel, improves the metal compactness of the steel, improves the organization form, refines the austenite grains, improves the mechanical properties of the forge piece, shortens the production cycle, and improves the production efficiency.

This invention discloses a method for optimizing the forging process parameters of TC11 titanium alloy thick-walled tubes, belonging to the field of metal plastic forming process optimization technology. The invention includes: clearly defining the microstructure defects caused by uneven deformation energy in the radial forging of a specific tube blank and the optimization objectives; constructing a simulation model to calculate the forming dimensions and internal deformation energy distribution under different process parameters; training a neural network surrogate model with an embedded deformation energy uniformity optimization objective; using this model to drive a multi-objective optimization algorithm to automatically search for the optimal combination of process parameters; and selecting and outputting the final optimal process parameters from the optimization results. By embedding a quantitative index reflecting the uniformity of deformation energy distribution into the process optimization model, this invention can simultaneously optimize the internal deformation energy distribution of the material while optimizing macroscopic dimensions, solving the problem that existing methods struggle to effectively assess and actively control this implicit factor affecting the final microstructure and properties of components during the process design stage.

This invention discloses a stress corrosion resistant non-magnetic drill collar and its manufacturing method, belonging to the field of stainless steel technology. It solves the problems of poor microstructure uniformity and the inability to simultaneously and effectively improve mechanical properties and stress corrosion resistance of existing non-magnetic drill collars. The manufacturing method includes the following steps: smelting molten steel; preparing ingots; forging the ingots into steel billets using a high-speed forging machine after they are tapped from the furnace; heating and holding the steel billets; forging the steel billets into intermediate billets using a radial forging machine; water cooling the intermediate billets; forging the water-cooled intermediate billets a second time using a radial forging machine, followed by air cooling to obtain finished steel billets; straightening, machining, and shot peening of the finished steel billets to obtain stress corrosion resistant non-magnetic drill collars; the composition of the non-magnetic drill collars, by mass percentage, includes: 18.30% ≤ Cr < 21.00%, 1.10% ≤ Mo ≤ 1.40%, 2.60% ≤ Ni ≤ 3.0%, 20.50% < Mn ≤ 22.00%, Si ≤ 0.4%, 0.01% ≤ Nb ≤ 0.015%, P ≤ 0.025%, S ≤ 0.01%, C ≤ 0.02%, 0.76% ≤ N ≤ 0.80%, with the balance being Fe and other unavoidable impurities. The non-magnetic drill collar of the present invention has excellent mechanical properties and resistance to stress corrosion.

The invention provides a rotary steel pipe blank wall radial forging shaping device, and relates to the technical field of steel pipe forging equipment. The buoyancy center clamping mechanisms are symmetrically arranged on the walking carrying table to clamp forging blanks with nearly circular sections; any floating center clamping mechanism is provided with a transmission main shaft and a floating chuck, the floating chuck is provided with a floating disc which is arranged on the transmission main shaft in a sleeving mode and rotates along with the transmission main shaft, the chuck which is arranged on the transmission main shaft in a sleeving mode is arranged on the front side of the floating disc, and the chuck is provided with three clamping blocks which slide in the radial direction and clamp a forging blank with the near-circular end face. A floating connecting rod with the two ends in spherical hinge connection is arranged between any clamping block and the floating chuck. The radial forging mechanism and the transmission main shaft are coaxially mounted on the walking carrying table to forge any section of forging blank with the near-circular section; the device has the advantages of being stable in clamping, uniform in shaping, high in automation degree, convenient and fast to maintain and the like, and is suitable for efficient and high-quality shaping machining of steel pipe blanks with nearly circular sections.