156 results about "Radial forging" patented technology

The invention belongs to the technical field of radial forging machine control, and particularly relates to a high-precision radial forging machine control system and a control method thereof.The method comprises the steps that a technological parameter database is established, dynamic parameters in the forging process are synchronously collected through a multi-source heterogeneous sensor, and workpiece surface temperature field distribution is obtained through an infrared thermal imager; measuring radial deformation through a laser displacement sensor group, and capturing internal defect characteristics of the material by using an acoustic emission sensor; the optimal forging frequency is calculated according to real-time material rheological characteristics, and a model predictive control algorithm is adopted to generate hammerhead motion trail correction; dynamic compensation control is implemented, and the back pressure of the hydraulic system is adjusted through strain rate feedback; and closed-loop quality evaluation is executed, online metallographic analysis is carried out in the forging intermittent period, process parameters are reversely corrected according to the grain size detection result, the fatigue life of the workpiece is predicted based on a digital twin model, and the effects that the whole forging process is dynamically controlled in real time, errors and deviation are effectively eliminated, and the forging precision is improved are achieved.

The invention relates to a preparation method of a niobium rod with uniformly crushed crystal grains, which comprises the following steps: firstly, casting an alloy raw material to obtain a cast ingot, and preheating the cast ingot to obtain a first blank; then the first blank is subjected to multiple times of axial forging and first heat treatment, and a second blank is obtained; then carrying out surface treatment on the second blank to remove defects on the surface of the second blank, and carrying out radial forging on the second blank to obtain a third blank; then, the third blank is subjected to oxidation treatment so that an oxidation film can be generated on the surface of the third blank to protect the third blank, hole pattern rolling is conducted on the third blank with the oxidation film generated multiple times, and a first bar is obtained; secondly, the first bar is subjected to rotary swaging and polishing, and a second bar is obtained; and finally, the second bar is subjected to second heat treatment, and a finished bar is obtained. Through multiple times of axial forging, radial rotary forging and groove rolling rotary forging, the obtained finished bar is uniform and fine in grain structure, the grain size GS is 7-9 grade, the elongation is larger than or equal to 40%, and the hardness (HV / 2.9 N) is smaller than or equal to 60.

The invention discloses a radial forging machine chuck rotation oscillation braking electro-hydraulic control system and method, and the control system comprises a position detection encoder installed on a hammer head of a forging main machine, a hydraulic servo motion controller, a high-frequency servo valve, an oscillation braking oil cylinder with the same area as an A cavity and a B cavity, and an oscillation braking device with a worm gear and a worm. The pressure sensor and the displacement sensor are integrated on the oil cylinder to form a closed-loop control loop; the control method comprises the following steps: activating an oscillation braking function and collecting hammer phase, oil cylinder pressure and displacement signals in real time; a sine control signal synchronous with the forging frequency is generated based on the brake phase of 270-360 degrees; a brake oil cylinder is driven to push the worm to axially move, and the rotating speed of the chuck is modulated through the helix angle characteristic; and the amplitude is dynamically adjusted through a displacement-pressure feedback signal, and 25MPa overrun protection is executed. The purposes of reducing the brake response delay rate, the forge piece distortion rate and the equipment impact load are achieved, and 90-620 times / min wide-frequency-domain forging is supported.

The invention relates to the technical field of titanium alloy radial forging, in particular to a titanium alloy radial forging method and system based on the radial reduction rate and the feed rate, and the method comprises the steps that a titanium alloy blank is obtained, the initial temperature, the radial reduction rate and the feed rate range are set, multi-pass forging is conducted, and a morphology distribution diagram is detected; building a forging simulation model, calculating radial strain and axial stress distribution, and evaluating material flow characteristics; segmenting the morphology distribution diagram through a local gradient and a dynamic threshold value, and generating an actual deformation distribution diagram in combination with strain information; and comparing the actual deformation uniformity distribution diagram with the simulated deformation uniformity distribution diagram to adjust the model so as to realize optimization. According to the method, the deformation uniformity and the technological parameter control precision of titanium alloy radial forging can be improved, and the dependence on high-cost equipment is reduced.

The medium-temperature radial forging method comprises the steps that pretreatment is conducted, specifically, a niobium-tungsten alloy extrusion bar blank is heated for 60-180 minutes at the temperature of 750-950 DEG C, rapid forging and straightening are conducted, and a medium-temperature radial forging bar blank is obtained and annealed for 60-120 minutes at the temperature of 1250-1450 DEG C; medium-temperature radial forging is conducted, specifically, a two-step method is adopted, in the first step, a bar blank is preheated to 80-100 DEG C and coated with Ta1350 high-temperature glass powder, heat preservation is conducted for 90-180 minutes at the temperature of 1050-1150 DEG C, and the bar blank is forged into a bar with the diameter of 70 + / -1 mm in the mode that the diameter is reduced by 7-10 mm every time; and in the second step, the heating and coating processes are repeated, the diameter is reduced by 5-7 mm every time, and the bar with the required specification is manufactured. By optimizing the medium-temperature forging and annealing process, the fine grain structure is controlled, the high-temperature mechanical property, creep resistance and oxidation resistance of the material are improved, and the material is suitable for aerospace engines and other high-temperature and high-pressure scenes. Compared with a traditional method, the technology improves the yield, shortens the production period, reduces the labor intensity, is suitable for large-scale production, reduces surface air suction, oxidation and burning loss, and improves the production efficiency and the finished product quality.

The invention relates to the technical field of metal plastic forming, and discloses a titanium alloy radial forging reduction rate collaborative optimization method based on material testing, which comprises the following steps of: acquiring dynamic characteristic data in a forging process in real time by acquiring multi-dimensional material performance parameters, and constructing a multi-target collaborative optimization model; and intelligent collaborative configuration of the reduction rate parameters is realized by adopting a self-adaptive weight distribution strategy. And a thermal coupling factor normalization equation and a phase field free energy functional normalization model are established, and the technical problems that in a traditional forging process, due to empirical configuration of reduction rate parameters, the structure is uneven, and residual stress exceeds the standard are solved. A lightweight model is deployed through edge computing nodes, millisecond-level dynamic correction of an optimization scheme is realized in combination with a 5G industrial private network, and the grain size qualification rate and the size precision of the titanium alloy forgings are improved. The method improves the yield of the grain size of the forge piece, ensures that the residual stress of the forge piece is reduced, stably controls the size precision, and improves the batch stability of high-end titanium alloy parts.

The present application relates to the technical field of metal plastic forming, and discloses a titanium alloy radial forging reduction rate collaborative optimization method based on material testing, which acquires dynamic characteristic data of a forging process in real time through multi-dimensional material performance parameter collection, constructs a multi-objective collaborative optimization model, and realizes intelligent collaborative configuration of the reduction rate parameter by using an adaptive weight distribution strategy. A thermal coupling factor normalization equation and a phase field free energy functional normalization model are established to solve the technical problems of uneven structure and excessive residual stress caused by the empirical configuration of the reduction rate parameter in the traditional forging process. A lightweight model is deployed through an edge computing node, and millisecond-level dynamic correction of the optimization scheme is realized in combination with a 5G industrial private network, thereby improving the grain size qualification rate and size accuracy of titanium alloy forgings. The present application improves the grain size qualification rate of forgings, ensures stable control of the size accuracy while reducing the residual stress of forgings, and improves the batch stability of high-end titanium alloy components.

The invention provides a medical TA4G pure titanium wire bar and a preparation method thereof. According to the preparation method of the medical TA4G pure titanium wire bar, firstly, alloy raw materials are subjected to vacuum consumable smelting, a first alloy ingot is obtained, and then cogging forging is conducted; carrying out multidirectional forging and water quenching treatment on the blank; then the blank is subjected to precise radial forging; and finally, after multi-pass small-deformation hot rolling is conducted on the blank, cold rolling is conducted, annealing is conducted after cold rolling, and the medical TA4G pure titanium wire bar is obtained. According to the method, the oxygen content is limited, and the medical low-oxygen high-performance TA4G pure titanium wire bar is finally obtained through the processes of repeated vacuum consumable smelting, cogging forging, multidirectional forging water quenching treatment, multi-pass small-deformation hot rolling, cold rolling and annealing. The invention also provides the medical TA4G pure titanium wire bar prepared by the method provided by the invention.

The invention relates to the technical field of forging data optimization, in particular to a forging frequency optimization method and system of an efficient radial forging machine. The method comprises the steps that forging parameters in the forging process of a radial forging machine are collected, and the collected forging parameters are preprocessed; according to historical forging data and forging results of the target radial forging machine, a forging frequency optimization model is established, the preprocessed forging parameters are input, and optimization analysis is conducted on the forging parameters; according to a result obtained after optimization analysis of the frequency optimization model, forging parameter optimization is conducted, and the vibration frequency and amplitude in the forging process are adjusted so as to control the change of forging force; the system comprises a forging parameter acquisition module, a forging frequency optimization model module and a forging parameter optimization module. According to the method, the forging parameters, especially the vibration frequency and amplitude, are optimized, so that the change of the forging force is more effectively controlled, the accuracy and effectiveness of optimization analysis are ensured, and the controllability and frequency of the forging process are improved.

The medium-temperature radial forging method comprises the steps that pretreatment is conducted, specifically, a niobium-tungsten alloy extrusion bar blank is heated for 60-180 minutes at the temperature of 750-950 DEG C, rapid forging and straightening are conducted, and a medium-temperature radial forging bar blank is obtained and annealed for 60-120 minutes at the temperature of 1250-1450 DEG C; medium-temperature radial forging is conducted, specifically, a two-step method is adopted, in the first step, a bar blank is preheated to 80-100 DEG C and coated with Ta1350 high-temperature glass powder, heat preservation is conducted for 90-180 minutes at the temperature of 1050-1150 DEG C, and the bar blank is forged into a bar with the diameter of 70 + / -1 mm in the mode that the diameter is reduced by 7-10 mm every time; and in the second step, the heating and coating processes are repeated, the diameter is reduced by 5-7 mm every time, and the bar with the required specification is manufactured. By optimizing the medium-temperature forging and annealing process, the fine grain structure is controlled, the high-temperature mechanical property, creep resistance and oxidation resistance of the material are improved, and the material is suitable for aerospace engines and other high-temperature and high-pressure scenes. Compared with a traditional method, the technology improves the yield, shortens the production period, reduces the labor intensity, is suitable for large-scale production, reduces surface air suction, oxidation and burning loss, and improves the production efficiency and the finished product quality.

The invention relates to the technical field of high-temperature alloys, and provides a preparation method of an oversized ingot type high-temperature alloy forging material, which comprises the following steps: S1, heating a high-temperature alloy ingot; s2, the high-temperature alloy cast ingot obtained in the step S1 is subjected to pre-deformation, wherein pre-deformation comprises upsetting and drawing-out which are conducted in sequence; s3, the pre-deformed high-temperature alloy cast ingot is subjected to homogenizing heat treatment; s4, performing cogging thermal deformation on the high-temperature alloy ingot subjected to the homogenizing heat treatment; and S5, the forging stock obtained in the step S4 is cooled and then subjected to heat treatment, and finally radial forging is conducted. According to the preparation method of the high-temperature alloy forged material, firstly, a large-size high-temperature alloy cast ingot is subjected to pre-deformation with the small deformation amount, and then homogenization heat treatment is conducted at the high temperature, so that segregation phases in the cast ingot are redissolved, segregation elements are diffused, and the high-temperature alloy forged material is obtained. And after homogenization, the high-temperature alloy cast ingot is subjected to fast forging and radial forging, and the high-temperature alloy bar with the uniform structure is obtained.

The invention discloses a preparation method of an ultra-fine grain Ti-Zr alloy bar. The preparation method comprises the following steps: a, smelting: mixing and smelting titanium sponge, zirconium sponge and zirconium dioxide to obtain a cast ingot; b, heating the cast ingot to 1000-1050 DEG C, and forging the cast ingot into a bar billet through upsetting and drawing; c, the bar blank is heated to 800-850 DEG C, and the bar blank is subjected to radial forging; d, the bar blank is heated to 600-700 DEG C for the first time and forged in the Z direction; second heating is conducted to 600-700 DEG C, and forging is conducted in the X direction; third heating is conducted to 600-700 DEG C, and forging is conducted in the Y direction; e, the bar blank is heated to 400-500 DEG C, and hot rotary swaging is conducted; f, cold rotary swaging is conducted, specifically, the bar blank is annealed at the temperature of 300-400 DEG C, and then cold rotary swaging is conducted; and g, the bar is subjected to annealing treatment at the temperature of 400 DEG C to 500 DEG C, and the ultra-fine grain Ti-Zr alloy bar is prepared. According to the method disclosed by the invention, the ultrafine grain Ti-Zr alloy bar with small diameter and high strength is prepared, and the industrial application of the implant can be realized.

The invention discloses a high-efficiency and low-cost TC4 titanium alloy fine-grain rod preparation method, which comprises the following steps of: accurately controlling the structure evolution in the hot working process of a rod material in a manner of replacing forging with rolling and combining forging and rolling, and carrying out cast ingot cogging forging for three heating numbers and low-temperature low-speed large-deformation rolling forming for four heating numbers, so as to obtain the high-efficiency and low-cost TC4 titanium alloy fine-grain rod. And finally, the TC4 titanium alloy fine-grain rod which is uniform and fine in structure and excellent in performance is obtained. The TC4 titanium alloy fine-grain bar prepared by the method reaches a leading level in the aspect of transverse and longitudinal structure uniformity and refinement. According to the preparation method, the difficulty in formulation of a forging and rolling combined process and the difficulty in structure regulation and control are broken through, the heating number of the preparation process is reduced from about 20 of a traditional radial forging process to 4 of rolling, and the preparation method of the TC4 titanium alloy fine-grain bar is efficient and low in cost.

The invention discloses a compact hydraulic clamping mechanism of a radial forging machine. The compact hydraulic clamping mechanism comprises a clamping module, a hydraulic servo module and a control unit module. The clamping module is of a single-layer push sleeve structure, a push sleeve is driven by a clamping cylinder to move axially, linear motion is converted into radial rotation of a clamping arm hinged to a clamp rod through matching of an inclined face of the push sleeve and a half shaft, and therefore a clamping jaw is driven to be closed or opened. The control unit module detects clamping force in real time through a pressure sensor, a hydraulic servo valve is adjusted through a controller, the pressure of oil entering a clamping cylinder is accurately controlled, and closed-loop dynamic accurate adjustment of the clamping force is achieved. The mechanism effectively solves the problems that a traditional chuck is long in axial size and insufficient in clamping force control precision by simplifying a mechanical structure and introducing electro-hydraulic servo control, and has the advantages of being compact in structure, high in adaptability, safe and reliable.

The utility model discloses a quick replacement tool for a hammer head of a radial forging machine, which comprises a horizontally arranged fixed shaft, a chuck is clamped at the right end of the fixed shaft, a clamping plate is fixedly connected to the middle of the fixed shaft, and the left end of the fixed shaft sequentially penetrates through the clamping plate and a clamping device and is slidably sleeved in a sleeve fixedly connected to the center of the clamping device. A nut is arranged between the end of the fixing shaft and the sleeve, a transmission shaft in threaded connection with the nut penetrates through the center of the nut, the left end of the transmission shaft is in threaded connection with a handle seat, the handle seat is in threaded connection with a handle, and meanwhile a pressing disc and a pressing ring are sequentially arranged between the transmission shaft and the handle seat so that the transmission shaft and the clamping device can be clamped and fixed. The hammerhead is clamped and fixed through the clamping device and the clamping plate, then the hammerhead is directionally moved to a main machine installation position through the chuck clamping and fixing shaft, the whole process depends on mechanical automatic operation, efficiency is high, safety is high, and personal injury risks caused by manual operation are avoided.

The invention discloses a titanium and titanium alloy thin bar continuous rolling production line and a rolling method. The rolling production line comprises a roughing roller set, a compensation heating device, a pre-finishing roller set, a temperature control device, a finishing roller set and a coiling device which are sequentially and linearly arranged. According to the production line, the (square) blanks can be linearly and continuously rolled into finished thin bars from one end to the other end, and the finished thin bars are coiled, so that the problems that the operation burden and the operation hidden danger exist in current reciprocating rolling, the temperature drop of the blanks cannot be effectively compensated in the continuous rolling process, and the production efficiency is low are solved. The problem that the temperature drop is further increased during material transfer among the procedures of radial forging, rough rolling and finish rolling is solved, so that the machining efficiency and yield of the titanium and titanium alloy coiled thin bars are effectively improved, meanwhile, the quality of finished products is further guaranteed through compensation and temperature control, and compared with remelting compensation after material transfer at present, the working efficiency is effectively improved, and the production cost is reduced. And the temperature compensation amplitude is reduced, so that the energy consumption of the whole processing stage is reduced.

The invention belongs to the field of metal material scientific and technical processing, and relates to a processing method for remarkably improving the impact toughness of a TC32 titanium alloy bar. According to the method, the microscopic structure type of the TC32 titanium alloy is a double-state structure, a primary alpha phase is converted into an equiaxial shape or a long rod shape under the action of dynamic recrystallization and static recrystallization under the action of 845-890 DEG C thermal deformation and double annealing, the volume fraction is kept at 15%-35%, a beta conversion matrix comprises two alpha phases with different sizes, and the size of the beta conversion matrix is kept at 10%-20%. Wherein the alpha laths of the coarse lamella form an alpha cluster, the toughness of the alloy is improved, and the fine needle-shaped alpha laths are woven into a mesh basket structure, so that the strength of the alloy is improved. Besides, through the radial forging mode of single-pass small deformation and accumulated large deformation, fine grain uniform forging deformation of the alloy is achieved, the strength level of the bar can be maintained to be 1000 MPa or above, and the impact toughness can stably reach 80 J / cm < 2 > or above. In addition, the machining method is high in efficiency, the size precision is easy to control, batch production can be achieved, and the structure performance stability of different furnace batches is improved.

The invention provides a preparation method of a high-strength and high-toughness GH4169 alloy bar and the high-strength and high-toughness GH4169 alloy bar. According to the preparation method, a steel ingot is machined in a mode of combining a fast forging cogging technology and an extrusion technology, and the problems that when radial forging forming is adopted, due to the fact that the diameter of a bar is small and cooling is fast, the surface of a forged bar is prone to cracking, and the grain size and delta phase distribution of the cross section of the bar are uneven are solved. And meanwhile, deformation passes are reduced, and the yield and the production efficiency of the alloy bar are greatly improved. Compared with a forged bar formed by adopting fast forging and radial forging, grains from the center to the edge of the cross section of the prepared extruded bar are uniform, and no delta phase is separated out. After extrusion is finished, through standard heat treatment, the strength of the bar is equivalent to that of a forged bar, and the impact toughness is greatly improved.

The invention provides a preparation method of a high-uniformity GH4169 high-temperature alloy bar. According to the preparation method, the high-uniformity GH4169 alloy bar is prepared by adopting a high-uniformity annealing and free forging technology; the method comprises the following steps: firstly, carrying out 2-3 heating number axial upsetting and drawing cogging forging and 2-3 heating number radial upsetting and drawing forging on a GH4169 alloy, and then carrying out high-uniformity annealing heat treatment; after heat treatment, the blank is subjected to 2-3 heating number radial upsetting and drawing forging, and then secondary high-uniformity annealing heat treatment is carried out; after the secondary heat treatment, the blank is subjected to twice radial forging of 2-3 heating numbers, and air cooling is carried out after the forging is completed; and finally, the blank is subjected to 2-3 heating number drawing forming after being subjected to heat preservation at the temperature of 980-1010 DEG C, and air cooling is conducted after forging is completed. Compared with the prior art, the structure uniformity of the large bar billet is further improved, the mechanical property of the alloy is improved, the performance consistency in different directions at room temperature / high temperature is improved, and the complex force bearing condition of the high-temperature alloy material for the aero-engine can be met; the method has the advantages of simple process, low production cost and high material utilization rate.

The invention provides a preparation method of a nickel-based superalloy rolled bar, which comprises the following steps: firstly, carrying out radial forging on a nickel-based superalloy bar billet to obtain a nickel-based superalloy square billet; the nickel-based high-temperature alloy is a GH80A alloy; then, the nickel-based high-temperature alloy square billet obtained in the previous step is heated and subjected to heat preservation, then hot rolling is conducted, cooling is conducted, and a rolled bar is obtained; and finally, the rolled bar obtained in the previous step is subjected to solution treatment, and the nickel-based high-temperature alloy rolled bar is obtained. The 150-200 alloy square billet is rolled into a material through a continuous rolling unit, the processes of square billet heating, hot rolling, cooling and the like are adopted, the finish rolling temperature of the alloy is guaranteed by increasing the rolling starting temperature and high-speed continuous rolling, and compared with the traditional process of rolling the GH80A alloy through a reciprocating rolling mill, the process is more controllable and less affected by human factors, and the production efficiency is improved. And the macrostructure and the mechanical property of the alloy subjected to heat treatment are improved, and the use requirements of blades or bolts of gas turbines of ultra-supercritical thermal power generating units can be met.

The present invention provides a production method for small-diameter thick-wall titanium alloy seamless tubes, comprising: Step 1: obtaining a titanium alloy ingot through three times of VAR melting; Step 2: blooming, drawing out, and radial forging the titanium alloy ingot into a round bar, and machining the round bar into a hollow tube blank through deep hole drilling, internal honing, and external turning; Step 3: performing three passes of cold rolling on the hollow tube blank to produce a finished titanium alloy seamless tube; sampling the titanium alloy tube after each pass of cold rolling, observing its crack defects, removing the crack defects, and performing intermediate vacuum annealing after removing the crack defects; Step 4: performing vacuum annealing, straightening, pickling, ultrasonic testing, and packaging on the titanium alloy finished tube in Step 3 to produce a small-diameter thick-wall titanium alloy seamless tube. The present invention comprehensively formulates measures from aspects such as tube blank specification design, tube blank processing technology, titanium alloy tube cold rolling process design, vacuum annealing process design, and internal and external surface defect treatment technology of the tube blank to solve the problem of internal surface cracks in cold rolling of small-diameter thick-wall titanium alloy seamless tubes.

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.

The invention relates to a method for controlling the uniform wall thickness of a radially forged hollow component. The method comprises the following steps: selecting a pipe blank and a core rod for hollow forging, wrapping the surface of one end of the pipe blank, painting an inner hole with an anti-oxidation coating, heating the pipe blank and lubricating the inner hole of a hot blank with glass powder, adopting proper rolling reduction during forging, configuring a blank feeding speed and a rotating angle of a precision forging machine during forging, controlling a forging sequence, and finishing and straightening at a high temperature. The high-precision hollow pipe blank and the core rod are adopted, and in order to achieve uniform deformation, friction is reduced from the temperature uniformity, anti-oxidation and lubrication modes of the blank; in order to ensure that metal flows are consistent, requirements are put forward from the aspects of forging deformation sequence and deformation parameter configuration; bending caused by forging and high-temperature normalizing is eliminated through radial warm forging, a key technology for controlling the wall thickness difference of the radial forging 40CrNi4Mo1V steel hollow component is formed, the wall thickness difference of a blank forging piece of the hollow component is smaller than or equal to 5 mm, the out-of-roundness of an inner hole is smaller than or equal to 3 mm, and the rough machining condition is met.

The application relates to the field of non-ferrous metal material smelting, in particular to a manufacturing method of a TB6 free forging piece with eliminated beta spots, which comprises the following steps: proportioning alloy raw materials according to the mass percentage of elements; adopting a vacuum consumable furnace to perform three times of vacuum consumable smelting on the alloy raw materials; performing high-temperature homogenizing diffusion annealing treatment on a TB6 titanium alloy ingot to obtain an annealed TB6 titanium alloy ingot; performing cogging on the annealed titanium alloy ingot by a quick forging machine; performing heat preservation on the TB6 titanium alloy blank at a temperature of 990-1000 DEG C for 5-6 hours; and performing water cooling after the heat preservation to obtain a water-cooled TB6 titanium alloy blank; performing T β The following 40-50 DEG C is heat preserved for 3-4 hours, and then is forged into a material by a radial forging machine. The application effectively solves the problem of beta spots which are prone to occur in TB6 titanium alloy products; can effectively control Fe segregation, eliminate beta spot defects in the TB6 titanium alloy product organization, and improve the product yield.

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.

The application discloses a kind of adaptive centering mechanism for radial forging machine unit, including symmetrically arranged sliding bracket, drive cylinder, base and slide. Wherein: sliding bracket is fixed to main machine by mounting plate, and is lifted along slide under the drive of cylinder;Base two ends are fixedly connected with sliding bracket, and two support shafts are arranged in parallel on it;Slide is slidably installed on support shaft, and V-shaped roller is arranged on its upper surface to support blank, and cylindrical roller bearing is installed on its back;Baffle is fixed to main machine and is provided with guide inclined plate.Working process, slide is self-adapting sliding alignment under eccentric blank thrust force, and cylindrical roller bearing is forced to reset along baffle inclined plate when falling.The application solves the problem of traditional mechanism centering, and significantly improves the adaptability and reset efficiency of large-tonnage radial forging machine to eccentric blank.

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.