2394 results about "Forging" patented technology

The invention relates to a multi-parameter and multi-field intelligent optimization method and system for a press free forging large-scale falling die, and the method achieves the collaborative optimization of technological parameters, die geometry and microstructure through a heat-force-microstructure three-field coupling modeling, a deep kernel learning agent model and a digital twinning guided multi-objective evolutionary algorithm, improves the optimization efficiency, and improves the optimization precision. The mold testing times are reduced; and meanwhile, a real-time closed-loop control system is constructed, the grain size uniformity of forgings is improved, the forming load is reduced, the production period is shortened, the process stability is improved, and the die service life is prolonged.

The invention belongs to the technical field of bearing manufacturing, and particularly relates to a quenching and tempering heat treatment method for a large heavy-duty bearing ring piece, which is suitable for quenching and tempering heat treatment of a thick large-section ring piece. And the thick and large-section ferrule ring piece is heated to the quenching temperature in a segmented and stepped mode, the ferrule ring piece is hoisted to a circulating water pool to be subjected to water cooling after heat preservation is completed, cooling is conducted till the surface temperature of the ring piece is lower than 100 DEG C, and the quenched ferrule ring piece is timely charged into a furnace to be tempered twice. The surface of the ferrule ring subjected to quenching and tempering heat treatment is free of cracks, the deformation degree is small, a martensite structure with the full cross section quenched thoroughly can be obtained, and the uniformity of the surface layer, the core structure and the performance of the ferrule ring with the thick and large cross section can be greatly improved. In addition, the quenching and tempering heat treatment process is simple to operate, and the consistency of the performance of the ferrule ring pieces in all batches is easily ensured. The method is not limited to a process of a large heavy-duty bearing ring piece, is also very suitable for thermal refining of other large forgings, and solves the defect problems of non-uniform structure, unstable performance and the like.

The invention relates to the technical field of forge piece forming, in particular to a deep-cavity thin-wall support forge piece, a forging die and a forming method.The deep-cavity thin-wall support forge piece is characterized in that a heated round bar is subjected to roll forging to obtain a preformed blank, and oxide skin of the blank obtained after roll forging is removed; putting the prefabricated blank into a pre-forging cavity of a forming die, and performing pre-forging forming; after pre-forging is finished, the pre-forged piece is transferred into a precision forging cavity of the same forming die to be subjected to precision forging forming, and a bilaterally symmetrical precision forging piece is obtained; putting the bilaterally symmetrical precision forgings into a slicing die frame for trimming, and cutting off flashes; cutting the bilaterally symmetrical precision forgings subjected to cold shaping from the shunting bin through a cutting device, and separating the bilaterally symmetrical precision forgings into two independent single forgings; forming defects are eliminated, and the forging yield is improved to the level of stable mass production; the thickness tolerance of the functional surface of the product is ensured, the spot welding current stability and the welding strength are ensured, the assembly requirement is met, and the dependence on subsequent machining is reduced; the material cost is reduced and the mold life is prolonged.

The invention belongs to the technical field of metal forge piece forging and pressing, and particularly discloses a metal forge piece forging and pressing forming device which comprises a box body, a supporting table is connected to one side of the upper end of the box body, supporting columns are connected to the upper end of the supporting table, a top plate is connected to the upper ends of the supporting columns, and a hydraulic cylinder is connected to the middle of the upper end of the top plate. The output end of the hydraulic cylinder penetrates and extends to the lower end of the top plate and is connected with a lower pressing plate, the lower pressing plate slides on the outer walls of the multiple supporting columns, and openings are formed in the positions, corresponding to the multiple supporting columns, of the lower pressing plate. Through separated lubrication of the cleaning mechanism, the spraying mechanism and the lower die, the effects of replacing manual operation and guaranteeing cleaning and lubrication of the core rod and the lower die are achieved, and the forming quality and the production efficiency of the aluminum alloy deep-hole forge piece are improved.

The invention relates to the technical field of metal casting and powder metallurgy, in particular to a pressure self-adaption adjusting method and system for multi-material forging and pressing, and the method comprises the steps that 1, forging and pressing equipment and a parameter collecting system are initialized; 2, multi-parameter data in the forging and pressing process are collected in real time; 3, calculating the dynamic deformation resistance of the material based on the real-time parameters; step 4, generating a self-adaptive pressure regulation value according to the dynamic deformation resistance; 5, controlling a pressure executing mechanism to output a target pressure value; and 6, the forging and pressing process is continuously monitored and terminated, the step 2 to the step 5 are repeated until the displacement of the die reaches a preset forging and pressing completion position, the central processing unit sends out a termination signal, the pressure execution mechanism gradually unloads pressure to complete the forging and pressing process, and all parameters and adjustment records are stored for quality analysis. Through accurate pressure control and a closed-loop feedback mechanism, defects caused by too high or too low pressure are avoided, the rejection rate is remarkably reduced, and the qualified rate of products is increased.

The invention belongs to the technical field of research and development of fast neutron reactor jackets and structural materials, and particularly relates to a high-temperature-lead-bismuth-corrosion-resistant high-silicon-content ferrite / martensite steel ladle tube and a preparation method thereof. According to the mass percentage, the composition mainly comprises the following components: 0.16-0.24% of C; 0.4 to 0.8 percent of Mn; cr: 11.6% to 12.4%; 1.2 to 1.8 percent of W; 0.1 to 0.4 percent of Ta; 0.2 to 0.4 percent of V; 1.0%-1.8% of Si and Fe. The preparation method comprises the steps of vacuum induction and vacuum arc remelting. Carrying out homogenization treatment and forging; extruding and annealing; cold rolling and annealing; and performing normalizing and tempering treatment. Through an efficient short-flow process route and reasonable smelting, pipe machining deformation and heat treatment processes, the microscopic structure of the material is remarkably improved, then the mechanical property and high-temperature lead and bismuth corrosion resistance of the finished pipe are improved, and the use requirement of the lead and bismuth cooling fast reactor fuel assembly cladding material under the high-temperature working condition is met.

The invention discloses a forging part surface defect detection mechanism, and belongs to the technical field of forging part detection. The forging part surface defect detection mechanism comprises a detection table, a flaw detector is installed on the outer wall of the top end of an electric cylinder, a cleaning assembly used for cleaning oxide skin on the surface of a forging part is arranged on the outer wall of the detection table, and a driving assembly is arranged on the inner wall of a supporting plate. The distance between the front push block and the rear push block can be adjusted according to the length of the cylindrical forging part through rotation of the small-lead screw rod, and after the cylindrical forging part is placed on the surface of the supporting plate, the small-lead screw rod drives the front push block and the rear push block to push the cylindrical forging part to slowly move towards the flaw detector. And meanwhile, the first driving roller and the second driving roller push the cylindrical forging part to rotate rapidly, at the moment, the cleaning assembly moves towards the surface of the cylindrical forging part, a sealing area is formed on the surface of the cylindrical forging part, the grinding disc is started to grind oxide skin in the sealing area, and dust and impurities generated during grinding are intensively discharged through the exhaust pipe.

The invention relates to a preparation method of a high-hardness high-strength free-cutting platinum-iridium alloy bar and the platinum-iridium alloy bar, the purity of raw materials is higher than 99.95%, and the platinum-iridium alloy bar comprises 9.5-10.5 wt% of iridium and the balance of platinum and inevitable impurities; the preparation method comprises the following steps: step 1, smelting and casting; the temperature of the alloy casting rod is increased to be higher than 1100 DEG C in a segmented mode, heat preservation is conducted for 100 min or above, at least three stages of forging dies are adopted for hole shrinkage hot forging, and the hole shrinkage proportion between the forging dies at all stages is 8%-25%; and thirdly, cold machining is conducted, the non-sharpening platinum-iridium alloy bar with the diameter ranging from 0.6 mm to 6.0 mm is obtained, the hardness of the platinum-iridium alloy bar is 180 HV or above, and the tensile strength of the platinum-iridium alloy bar is 550 MPa or above. Through the processes of high-frequency smelting, preheating casting, hole shrinkage hot forging and the like, bar forming and internal structure and surface quality regulation and control are considered, and the high-hardness and high-strength non-cutting platinum iridium alloy bar product is directly obtained.

The invention relates to the technical field of alloys, in particular to a weldable high-temperature corrosion-resistant nickel-based alloy and a preparation process thereof. The nickel-based alloy comprises Cr, Mo, W, Ti, Al, Nb, Co, B, Zr, La, C, Si, Mn, P, S and the balance Ni and inevitable impurities. The element content meets the following conditions: Al + 0.5 Ti + 0.3 Nb is greater than or equal to 3.35 wt.% and less than or equal to 3.8 wt.%, the volume fraction of the gamma'phase is correspondingly 28-34%, and the electron vacancy number Nv is less than 2.6. According to the preparation process, VIM and PESR duplex smelting, multi-pass forging, solid solution rapid cooling and aging heat treatment are adopted, and the welding process is optimized in a matched mode. The alloy has excellent welding performance while maintaining excellent high-temperature strength and corrosion resistance, and is particularly suitable for high-temperature parts needing to be welded in the fields of aerospace, energy, chemical industry and the like.

The invention belongs to the technical field of aluminum alloys, and particularly relates to a high-toughness anti-fatigue aluminum alloy and a preparation method thereof. The alloy comprises the following components in percentage by mass: 0.6-1.4% of Mg, 0.6-1.4% of Si, 0.5-1% of Mn, 0.3-0.8% of Cu, 0.1-0.4% of Cr, 0.1-0.3% of Mo, less than or equal to 0.15% of Fe, less than or equal to 0.05% of Ti, less than or equal to 0.05% of other impurities and the balance of Al. In the alloy, the ratio of Mn to (Cr + Mo) is 2-5, and Cr + Mo is less than or equal to 0.4. The aluminum alloy is subjected to synergistic microalloying of elements Mn, Cr and Mo and three-stage homogenization treatment, then a high-density'core-shell 'structure dispersed phase is separated out, and the deformation structure regulation and control effect is effectively improved; through hot forging and multi-stage solution treatment, a mixed crystal structure in which sub-crystals and recrystallization coexist is obtained, the fatigue crack propagation rate is remarkably reduced, and the obdurability and the fatigue resistance are synchronously improved.

According to the welding machining device and method for the inner net and the outer net of the filter, the welding machining device comprises the machining machine table, the lifting mechanism, the moving mechanism, the roller electrode, the shaft electrode and the hooping mechanism, and complex spatial spiral movement is simplified into single axial movement of the roller electrode in a joint channel; an expensive and complex high-precision multi-axis linkage numerical control system is not needed, only one common motor is needed to drive a roller electrode to linearly walk along a joint channel, inclined joint welding of the filter metal net is completed, a workpiece can be driven to rotate in a pure mechanical mode, the cost is low, the welding efficiency is high, and through a micro forging and pressing mode in advance, the welding efficiency is high. According to the method, a solid metal strip with the width of about 1-2 mm and without through holes is formed, and the solid strip provides a continuous and uniform contact surface for a subsequent roller electrode, so that a constant resistance and ideal current path is provided, controllable and predictable generation of welding heat is realized, and the problems of pseudo soldering and overburning caused by meshes are greatly reduced.

The invention discloses a preparation method of a TA11 alloy bar with high creep resistance. The preparation method comprises the following steps: S1, ingot casting preparation: performing VAR smelting on an alloy for three times to obtain a TA11 alloy ingot with components meeting requirements; s2, intermediate billet forging is conducted, specifically, the qualified cast ingot obtained in the S1 is subjected to two-heating-number forging at the temperature higher than the beta phase transformation point temperature, and an intermediate billet is obtained; s3, multi-heating-number circulating forging is conducted, specifically, the TA11 alloy intermediate blank obtained in the S2 is subjected to five-heating-number forging deformation within the range above and below the beta phase transformation point temperature, and an intermediate precision forging blank which is uniform in structure and high in alpha phase content is obtained; and S4, finish forging machining of a finished product bar is conducted, specifically, finish forging machining is conducted on the TA11 alloy intermediate finish forging blank obtained in the S3 at the temperature below the phase transformation point temperature, and the TA11 alloy bar with the high creep resistance is obtained. The TA11 alloy bar prepared through the method is high in alpha-phase content and stable in control, the structure is uniform and consistent, and the high-temperature creep resistance is stably controlled to be smaller than or equal to 0.15%.

The invention relates to a forging method of a high-strength, high-creep-resistance and high-structure-stability Ti1100 alloy bar, belongs to the technical field of titanium alloys, and aims to solve the problems that in the forging process of an existing method, macrosegregation is prone to occurring; at least one of the problems that the process is difficult to control due to narrowing of a machining window, forging is difficult due to great increase of deformation resistance, cracking is caused due to plasticity reduction, and the Ti1100 alloy bar is poor in structure stability and short in service time are solved. According to the forging method of the Ti1100 alloy bar, through one-heating-number blooming forging, one-heating-number grain refinement and homogenization forging and 2-4-heating-number cross-phase region forging, the problem of macrosegregation caused by high alloy element content in the forging process is solved; and the problems that the process is difficult to control due to narrowing of a machining window, forging is difficult due to great increase of deformation resistance, and cracking is caused due to plasticity reduction are solved.

The invention discloses a preparation method of a high-impact-toughness super-large-specification Ti80 titanium alloy ring forging, and belongs to the technical field of high-quality titanium alloy materials. The method comprises the following steps: preparing a cast ingot; the prepared cast ingot is subjected to multi-heating-number forging, and a cake blank is obtained; the prepared cake blank is subjected to ring rolling forging, and an annular blank is obtained; and the prepared annular blank is subjected to heat treatment, and the titanium alloy ring forging is obtained. According to the titanium alloy ring forging process adopted by the invention, on the premise of eliminating the longitudinal welding seam, the overall structure uniformity of the pressure-resistant shell can be ensured, and the mechanical property is stable. By designing a reasonable processing route and formulating optimal processing parameters, the uniformity of the material structure is improved, and the manufacturing safety and reliability of the pressure-resistant shell are improved. The method is suitable for preparing the Ti80 titanium alloy ring forge piece with the outer diameter of 4000-10000 mm, the wall thickness of 100-500 mm and the piece weight larger than or equal to 8 t.

The invention relates to the technical field of steel pipe production, and particularly discloses a production process of a seamless steel pipe special for a high-temperature-resistant and high-pressure-resistant boiler. Under preset process parameters, a clamping mechanism is used for driving a steel billet to rotate and axially feed in, and the steel billet is symmetrically and synchronously beaten through a plurality of hammer heads, so that the steel billet is formed into a round billet; heating and perforating the round billet to obtain a pierced billet; and the pierced billet is sequentially fed into a hammerhead machine and a cold-drawing machine to be subjected to heading and drawing so as to conduct sizing on the steel pipe. The steel pipe is produced by combining a hammering forging mode with a perforating mode, and a plurality of synchronous symmetrical hammers are used for hammering, so that dynamic recrystallization and grain refinement are realized, the compactness of a steel pipe material is improved, and the high-temperature resistance and the pressure resistance of the steel pipe are improved; the circular-arc-shaped hammer head is adopted to be matched with the curvature of the steel billet, stress concentration is avoided, one-time circle forging, punching and sizing of the steel billet are achieved, the advantage of procedure integration is achieved, and the production efficiency is improved.

The invention relates to the technical field of stainless steel production and manufacturing, and discloses a high-strength corrosion-resistant duplex stainless steel shaft forging method which comprises the steps of blank preparation, homogenization treatment, preheating treatment, multidirectional forging, interrupted cooling, solution treatment, aging treatment and surface finish machining. Uniformity of components in the blank and consistency of temperature distribution are guaranteed, a uniform microstructure basis is provided for subsequent forging, meanwhile, grains are refined through large deformation and multi-pass deformation in multi-directional forging, the strength and toughness of the shaft are improved, brittle phase formation is avoided, and the mechanical property is optimized; by interrupting cooling and solution treatment, controlling the cooling rate and heating parameters in real time, inhibiting harmful phase precipitation and optimizing the austenite-ferrite phase proportion, the shaft has high corrosion resistance, and by means of aging treatment, through a stable structure, the long-term durability of the shaft in a severe environment is guaranteed, and the corrosion weight loss and pitting corrosion risk are reduced.

The invention discloses a high-Al and Ti difficult-to-deform high-temperature alloy hot working method, which avoids the melting risk of low-melting-point intermetallic compounds through high-temperature diffusion on one hand, and can realize effective and uniform diffusion of chemical elements on the other hand; on the other hand, through gradual heating number cooling forging, a high-temperature small-deformation forging process is carried out in an as-cast structure interval, and a low-temperature large-deformation process is adopted after the as-cast structure is crushed, so that an ideal uniform and fine recrystallized grain structure is finally realized, and the problems of high possibility of cracking, non-uniform forging structure, coarse grains and the like in a high-temperature alloy forging process are solved; and the high-quality requirement for use of downstream aero-engine components is met.

The invention relates to the technical field of wind power gear forging, in particular to forging equipment for wind power gear forgings and a forging method of the forging equipment. A protective vertical plate is fixed to the corner of the top of the base, a top plate is installed at the top of the protective vertical plate, and a forging hydraulic machine is installed at the middle end of the top plate. Wherein the forging platform is located at the top of the base; wherein the number of the overturning bases is two, the two overturning bases are installed at the two ends of the top of the forging platform, and guide grooves are formed in the upper ends of the overturning bases. By means of the arrangement of the overturning base, manual near-field operation is replaced, safety risks caused by high-temperature and heavy forgings are completely eradicated, safe interlocking is formed by the groove type photoelectric switch and the Z-shaped shielding piece, it is ensured that the action is accurate and reliable, the overturning time is shortened to be the shortest, a high-temperature forging window of the forgings is fully utilized, and the heating frequency is reduced.

The invention relates to a forging method of an aluminum alloy rectangular-ambulatory-plane frame, which comprises the following steps: selecting a cast ingot or a bar billet as a raw material, performing three-way upsetting and pulling modification to prepare a square transition billet with a square plate and a concave step, and positioning the concave step between the two ends of the square plate in the length direction; a flat anvil is used for conducting multi-pass forging on the inwards-concave steps, the two ends of the square plate are widened to the matched size after each pass of forging is completed, the square transition blank is flattened to form a square plate blank, and inwards-concave grooves are formed in the center positions of the plate faces of the two sides of the square plate blank; a pre-forging die is used for pre-forging the square plate blank, so that the square plate blank is shaped into a frame type pre-forged piece with a wad in the center; and a finish forging die is used for conducting finish forging on the frame type pre-forged piece, so that the frame type pre-forged piece is forged into a frame finish forged piece shaped like a Chinese character'hui '. According to the method, concave grooves are formed in the center positions of the two side plate surfaces of the square plate blank during pre-forging, so that the square plate blank can be formed into a hollow-square-shaped frame final forging piece only through one-time pre-forging shaping and final forging.

The invention discloses a bearing ring forging die and relates to the field of forging, the bearing ring forging die comprises a bottom die mounted on a forging machine body, a forging hammer corresponding to the bottom die is arranged on the forging machine body, a base located below the bottom die is mounted on the forging machine body, a die cavity is formed in the bottom die, a circular groove is formed in the bottom of the die cavity, and a bearing ring is arranged in the circular groove. The inner side face of the circular groove is slidably connected with a groove expanding top seat, a vertical groove is formed in the groove expanding top seat, the inner side face of the vertical groove is slidably connected with a grooving top seat, and the mold cavity, the groove expanding top seat and the grooving top seat are concentrically arranged. According to the bearing ring forging die, through mutual cooperation of the bottom die, the groove expanding top base, the grooving top base and the synchronizing mechanism, the bearing ring can be rapidly formed in the die forging process, in the forming process, the upper stress and the lower stress of a blank are uniform, and therefore high-efficiency and high-quality preparation of the bearing ring can be effectively guaranteed.

The application provides an aluminum alloy, which comprises the following components in percentage by mass: Zn 4.0-5.0%, Mg 1.2-1.8%, Cu 0.1-0.3%, Zr 0.08-0.12%, Ti 0.02-0.06%, Fe less than or equal to 0.25%, and the balance of Al. The alloy elements containing Zn 4.0-5.0%, Mg 1.2-1.8%, Cu 0.1-0.3%, Zr 0.08-0.12%, Ti 0.02-0.06% and Fe less than or equal to 0.25% are added into a smelting furnace together with pure aluminum, smelted at 700-750 DEG C to form a melt, refined by blowing in inert gas or adding a refining agent, and the gas and inclusions are removed. The application utilizes the shearing force generated by the different rotating speeds of the upper and lower rollers of a differential rolling mill to break the coarse structure, refine the grains, and increase the dislocation density. The aluminum alloy is rolled at 480-500 DEG C to reduce the deformation resistance, promote dynamic recrystallization, maintain the processing performance, and further enhance the performance by 60-70% of the total deformation. After rolling, the aluminum alloy is subjected to multi-directional forging, the strain direction is changed multiple times, the grains are broken, the structure is homogenized, and anisotropy is eliminated, so that the comprehensive performance and application range of the aluminum alloy profile are improved. The problem that the structure cannot be refined and the dislocation density cannot be increased during the rolling process is solved.

The invention belongs to the technical field of titanium alloy material processing, and particularly relates to a preparation method of a titanium alloy bar with high crystal orientation uniformity. Comprising the following steps that S1, one-upsetting and one-drawing cogging is conducted in a single-phase area, and remelting and heat preservation are conducted after forging; s2, one-upsetting and one-drawing forging is carried out on the two-phase region, and after upsetting, temperature compensation and drawing-out are carried out; s3, single-phase region heat preservation, and stage cooling after heat preservation; s4, multi-heating-number two-upsetting and two-drawing forging is conducted on the two-phase region, and reversing drawing-out is conducted after upsetting; s5, upsetting and drawing out the two-phase region; s6, drawing out a two-phase region; and S7, forming a two-phase region. The TC11 titanium alloy bar prepared through the process is good in structure and crystal orientation uniformity and has good mechanical performance after heat treatment, the difference of the mechanical performance of all areas is small, and the TC11 titanium alloy bar can be applied to aerospace high-end parts with strict requirements for the alloy structure and performance.

The invention discloses a thermomechanical treatment method for manufacturing a high-performance ribbed shell section, and belongs to the technical field of high-performance precision plastic forming manufacturing. According to the method, firstly, through high-temperature multidirectional forging cogging, medium-temperature rectangular ring rolling and high-temperature in-mold forging and rolling composite forming, near-net forming of the ribbed shell section, coarse crystal phase crushing and refining and grain refining are achieved; and finally, through the design of solid solution, in-mold cold rolling and aging, the problem that cold deformation is discontinuous and uneven due to a split mold structure in an existing ring piece cold bulging process is solved, accurate shape correction, residual stress reduction and performance improvement are achieved, and the product quality is improved. And the high-performance near-net plastic forming and high-performance manufacturing requirements of a key structural part, namely a ribbed shell section, of an aerospace carrier are met.

The invention discloses a high-strength and high-plasticity copper alloy and a preparation method thereof. The high-strength and high-plasticity copper alloy is prepared by mixing Cu-Al pre-alloyed spherical powder and CuO powder according to the mass ratio of (100-150): 1, wherein the Cu-Al pre-alloyed spherical powder and the CuO powder are different in particle size range. The solid solution state Al element part in the high-strength plastic copper alloy is oxidized into Al2O3 through CuO, and the Al2O3 exists in a Cu matrix. The preparation method comprises the following steps: (1) mixing Cu-Al pre-alloyed spherical powder with CuO powder, and drying; (2) cold isostatic pressing treatment; (3) vacuumizing, sintering at a high temperature in a protective atmosphere, and cooling; (4) vacuumizing, reducing in a reducing atmosphere, and cooling; and (5) after preheating, the copper alloy reduction blank is placed in a rotary forging die, rotary forging and air cooling are conducted, and the copper alloy is obtained. The high-strength plastic copper alloy is good in conductivity and mechanical property and high in plasticity. The method is simple in process, environmentally friendly, low in cost and suitable for industrial production.

The invention discloses a forging and rolling combined method for preparing a large-specification super-long titanium alloy thick plate, which comprises the following steps of: S1, reversely deducing the size of a plate blank and the total amount of required raw materials according to the geometric size and working allowance of a target forged plate, designing the weight of a single cast ingot, mixing the raw materials and pressing into an electrode block, a titanium alloy cast ingot is smelted and prepared by adopting a three-time vacuum consumable electric arc smelting process; s2, after a high-temperature anti-oxidation coating is sprayed to the titanium alloy cast ingot, multi-heating-number forging is carried out, the multi-heating-number forging comprises high-temperature cogging forging, single-phase region forging and plate blank forming forging, and a rectangular plate blank is manufactured; s3, the plate blank is heated and subjected to two-phase region one-fire rolling, and a semi-finished thick plate is prepared; s4, after cracks and surface defects of the semi-finished thick plate are removed, the semi-finished thick plate is heated and subjected to two-phase region rolling, and a finished thick plate is manufactured; and S5, the super-long thick plate is sequentially subjected to annealing and surface treatment, and the finished plate is obtained. The method has the advantages that the traditional size limitation is broken through, the forming efficiency is improved, and the structure uniformity and the material performance of the large-specification forged plate are improved.

The invention relates to the technical field of manufacturing of metal pressing parts, in particular to an efficient forging control method, equipment and system for a high-precision gear shaft, and solves the technical problem that in the prior art, due to the regional difference of material flow and stress distribution, the temperatures of different regions of a shaft body are not uniform in the forging process. The method comprises the steps that vibration time sequence data of the gear shaft in the forging process and temperature time sequence data of multiple positions are collected; according to the temperature time sequence data of the multiple positions, the temperature distribution confusion degree of the gear shaft at each moment is determined; according to the vibration time sequence data, the striking strength sequence of the gear shaft in the forging process is determined; according to the temperature distribution confusion degree and the time sequence change of the strike intensity sequence, the influence degree of strike at each moment on the temperature distribution confusion degree is determined; and according to the temperature distribution chaos degree and the influence degree of each moment, the temperature control coefficient of each moment is determined, and temperature control is conducted on the forging process according to the temperature control coefficients.

The invention discloses a forging method for regulating and controlling the structure uniformity of a TiAl alloy, and belongs to the technical field of TiAl alloy material processing. According to the method, a TiAl alloy ingot is coated with a soft sheath, X-Y-Z three-dimensional six-pass reversing forging is carried out, then the sheath is removed, long-time annealing is carried out, X-Y-Z three-dimensional six-pass reversing forging is carried out again, and a TiAl alloy forging stock with a fine and uniform equiaxed structure is obtained; according to the method, the first round of six-pass forging is conducted on the blank through the X-Y-Z three-dimensional multi-pass reversing forging technology, short-time annealing is conducted between the passes, through the mode of combining dynamic recrystallization and sub-dynamic recrystallization, evolution of a thick and large as-cast structure in a TiAl alloy ingot is promoted, a fine equiaxed structure is formed, the uniformity of the forging stock is improved, and the yield of the TiAl alloy ingot is increased. And the blank is subjected to long-time annealing treatment, growth and spheroidization of residual lamellar structures are achieved, second-round six-pass forging is conducted, the grown equiaxed structures are refined, it is ensured that the TiAl alloy forging stock has the fine and uniform equiaxed structures, and the mechanical property of the TiAl alloy forging is improved.

The invention relates to the technical field of forging dies, in particular to a high-performance long-life precision forging die which comprises a forming mechanism, the forming mechanism comprises two symmetrical mounting bases, symmetrical dies are mounted on the opposite sides of the two symmetrical mounting bases correspondingly, and a connecting mechanism and a dismounting mechanism are mounted in the two mounting bases correspondingly. Symmetrical spraying mechanisms are installed at the two ends of one installation base respectively. Through cooperation of the forming mechanism and the connecting mechanism, forging and forming of materials are facilitated, quick disassembly and replacement can be achieved when products of different shapes are forged and pressed, through cooperative installation of the spraying mechanism and the adjusting mechanism, cleaning and oil spraying lubrication of the opposite sides of the forming mechanism are facilitated, and through driving of the forming mechanism to the control mechanism, the forming mechanism is more convenient to operate. The spraying mechanism is controlled by the control mechanism, the forming mechanism is conveniently disassembled and assembled through the disassembling mechanism, meanwhile, the locking mechanism is driven through the disassembling mechanism, and protection control over the connecting mechanism by the locking mechanism is achieved.

The invention discloses a manufacturing process of an NO7718 nickel base alloy nut for nuclear equipment. The manufacturing process comprises the steps of material preparation, hot forging, shot blasting, solid solution heat treatment, physical and chemical detection, finish machining, precipitation hardening heat treatment and detection packaging. The hot forging near-net forming technology is adopted, the shape of the nut blank is directly obtained through plastic deformation, the cutting allowance of machining is greatly reduced, a large number of raw materials are prevented from becoming sweeps, the material utilization rate is remarkably increased, and the raw material cost is effectively reduced; by accurately controlling the initial forging temperature, the final forging temperature and the cooling speed of hot forging as well as subsequent solution treatment and precipitation hardening treatment, grains can be refined, and the precipitation form and distribution of a strengthening phase can be controlled, so that the microstructure of the material is optimized, and the material obtains more excellent comprehensive mechanical properties such as higher strength, plasticity and toughness cooperation; and the harsh working condition requirements of nuclear equipment can be better met. The process provided by the invention ensures the stability and consistency of product performance.

The invention relates to a shape memory wide nickel-titanium alloy plate and a preparation method thereof, and the preparation method comprises the following steps: mixing and smelting alloy raw materials to prepare a nickel-titanium cast ingot, and homogenizing the nickel-titanium cast ingot; cutting off a dead head of the nickel-titanium cast ingot and then slitting the nickel-titanium cast ingot into a to-be-forged ingot blank; the ingot blank is subjected to a composite forging process combining high-frequency forging and low-frequency forging, and the accumulative deformation is 90% or above; a hot-rolled plate blank is obtained through two-stage hot rolling, and first-stage blooming at the temperature of 750-900 DEG C and second-stage finish rolling at the temperature of 700-850 DEG C are included; performing cold rolling on the hot-rolled plate blank to obtain a cold-rolled plate blank; and the cold-rolled plate blank is subjected to heat treatment strengthening, and the shape memory wide nickel-titanium alloy plate with the width being 600 mm or above is obtained. According to the wide nickel-titanium alloy plate prepared through the method, the thickness ranges from 0.3 mm to 3.0 mm, the yield strength is 450 Mpa or above, the tensile strength is 850 Mpa or above, the ductility is 20% or above, and the shape recovery rate is 90% or above.