25results about How to "Improve tissue performance" patented technology

The invention relates to a method for improving the same-circle mechanical property uniformity of a low-carbon cold heading steel wire rod, which comprises the following steps of: firstly, carrying out sectional heating on a steel billet at the temperature of a preheating section of 715-785 DEG C, the heating temperature of a first section of 810-850 DEG C, the heating temperature of a second section of 920-960 DEG C and the temperature of a soaking section of 1000-1040 DEG C; then the prepared steel billet is rolled into a wire rod, the initial rolling temperature ranges from 910 DEG C to 950 DEG C, the finish rolling inlet temperature ranges from 865 DEG C to 885 DEG C, the finish rolling outlet temperature is smaller than or equal to 1020 DEG C, and the finish rolling temperature ranges from 890 DEG C to 910 DEG C; the prepared wire is subjected to water cooling to 840-860 DEG C for spinning, and then the wire is rolled into a wire rod at 780-850 DEG C; and finally, the prepared wire rod is placed on a stelmor slow cooling line for heat preservation and slow cooling, the stelmor slow cooling speed is 0.2-1 DEG C / s, the temperature of entering a heat preservation vestibule is 740-770 DEG C, the heat preservation time of the heat preservation vestibule is 75-150 min, and the temperature of leaving the heat preservation vestibule is smaller than or equal to 400 DEG C. By means of the method, the same-circle mechanical property tensile strength fluctuation of the steel wire rod is smaller than or equal to 10 Mpa, the percentage reduction of area fluctuation is smaller than or equal to 2%, the percentage elongation after fracture fluctuation is smaller than or equal to 2%, the yield strength fluctuation is smaller than or equal to 8 Mpa, metallographic structures are evenly distributed, and no abnormal structure exists.

The invention relates to the technical field of welding, in particular to a lead-free solder composition and a preparation method thereof. The composition comprises brazing filler metal and a brazing flux, wherein the brazing filler metal comprises 55 to 65 parts of copper, 30 to 40 parts of zinc, 0.5 to 1 part of silver, 0.1 to 1 part of tin, 0.1 to 0.5 part of nickel, 0.02 to 0.15 part of lanthanum, 0.03 to 0.15 part of cerium and 0.05 to 0.2 part of indium; the brazing flux comprises 18-22 parts of borax, 13-17 parts of boric acid, 25-32 parts of a potassium fluoride and potassium fluoborate compound, 3-5 parts of calcium fluoride, 12-16 parts of aluminum oxide and 8-11 parts of magnesium oxide. The lead-free solder composition does not contain toxic lead elements, pollution to the environment and the ecological system is little, the wettability, corrosion resistance, strength, stability and the like of the lead-free solder composition are improved, and the welding quality is comprehensively improved. According to the preparation method, uniform distribution and accurate control of the brazing filler metal and the brazing flux are guaranteed, stability and consistency of product quality are guaranteed, and the preparation method is easy and convenient to operate and suitable for mass production.

The invention relates to a continuous casting and rolling process for a copper-aluminum composite board. The process comprises the following steps of: putting an aluminum ingot into a smelting furnace, melting the aluminum ingot into molten aluminum, loading a coiled copper strip onto an uncoiling machine at the top of a die-casting machine, preparing for continuous die-casting, and manufacturing a copper-aluminum composite board strip; a liquid outlet of the smelting furnace is opened, rollers on the die-casting machine and an uncoiler are started, molten aluminum is output from the liquid outlet of the smelting furnace, enters a material groove and flows into a material nozzle through the material groove, the molten aluminum is conveyed to the position between the rollers of the die-casting machine through the material nozzle, meanwhile, a copper strip is also conveyed to the position between the rollers of the die-casting machine, and a copper-aluminum composite plate strip is formed through rotation of the rollers in a die-casting mode; the rollers on the die-casting machine comprise the upper roller and the lower roller, the copper strip is fed along the surface of the upper roller, and the conveying speed of the copper strip is consistent with the rotating speed of the upper roller. According to the process, the input speed of the copper strip and the rotating speed of the upper roller are set to be consistent, so that the copper-aluminum contact length and time are changed, mutual diffusion of metal can be effectively controlled, and the bonding strength of the copper-aluminum composite plate is improved.

The invention relates to a magnetron plasma arc wire powder synergistic surfacing device and a surfacing method. The device comprises a welding gun fixing support; the welding gun is arranged on the welding gun fixing bracket, is used for realizing metallurgical bonding between a base material and cladding metal and comprises a welding gun tube, a non-consumable welding electrode and an inner nozzle assembly; the non-consumable welding electrode is wrapped by an insulating clamping sleeve and is fixed in the welding gun tube; the inner nozzle assembly is arranged between the welding gun tube and the welding electrode; the inner nozzle assembly is provided with a powder feeding port, a shielding gas nozzle and an ion gas nozzle; and the wire feeding mechanism is arranged on the welding gun fixing bracket and is used for feeding cladding metal to the surface of a base material. The method has the beneficial effects that the electric arc is controllable, parameters such as the direction and speed of cladding metal entering a molten pool can be adjusted, the surfacing process is stable, chemical components of a cladding layer are adjustable and controllable, the cladding speed is high, robot surfacing can be achieved, the automation degree of surfacing is improved, and the labor cost of surfacing is reduced.

The invention provides a magnesium alloy surface high-wear-resistance micro-arc oxidation film layer and a preparation method thereof. The preparation method comprises the following steps: S1, pretreatment of a magnesium alloy matrix: grinding and polishing the magnesium alloy matrix, and then cleaning and drying the magnesium alloy matrix; s2, preparing a silicate alkaline electrolyte: dissolving Na2SiO3, KF and NaOH in deionized water at room temperature, performing ultrasonic treatment until the Na2SiO3, the KF and the NaOH are completely dissolved, then adding the TiO2 nano-particles, and continuing ultrasonic treatment until the TiO2 nano-particles are uniformly dispersed in the deionized water to obtain the silicate alkaline electrolyte; and S3, micro-arc oxidation treatment is conducted, specifically, stainless steel serves as a cathode, the pretreated magnesium alloy matrix serves as an anode, the cathode and the anode are put into a silicate alkaline electrolyte, flushing and drying are conducted after micro-arc oxidation treatment, and then the high-abrasion-resistance micro-arc oxidation film layer is formed on the magnesium alloy sample. The structure, the structure and the performance of the magnesium alloy micro-arc oxidation film layer are improved by adding the nano TiO2 particles into the electrolyte, so that the wear resistance of the film layer is improved.

The invention discloses a thick-wall cylinder hot shearing extrusion short-process forming method based on a hollow casting blank, and belongs to the technical field of manufacturing of hard-to-deform alloy thick-wall cylindrical parts. The method comprises the following steps that 1, the thick-wall hollow casting blank is prepared; step 2, hot shearing extrusion; step 3, heat treatment; and step 4, finish machining. The hollow casting blank is prepared by adopting electroslag remelting or electroslag liquid pouring refining; according to the hot shearing extrusion, the hollow casting blank is directly subjected to hot extrusion forming through an annular cylindrical part shearing extrusion die, the technological processes of repeated heating, multi-step hot forging blank manufacturing and the like are omitted, one or two heating number forming is directly conducted, the production cost of materials, energy, manpower and the like can be reduced by about 15%-30%, and the forming and manufacturing efficiency of the annular cylindrical part is improved; the forming-forming effect of the thick-wall cylinder is improved, and meanwhile short-process forming manufacturing of the thick-wall cylinder is achieved.

The present invention discloses a control system and method for alloy additive manufacturing based on laser selective melting, wherein the control system comprises: a laser emission module for outputting laser; a molding chamber, comprising a molding cylinder for manufacturing the required workpiece; and a winding module for providing an alternating magnetic field to the molding cylinder. The present invention provides a solution for grain refinement and strengthening of alloy laser selective melting additive manufacturing based on an alternating magnetic field, which suppresses the texture of aluminum alloy dendrites along the direction of heat diffusion through the composite field effect, blocks epitaxial growth, realizes grain refinement and directional solidification, and thus strengthens the structural properties. The present invention can be widely used in the field of laser melting technology.

The invention discloses a zirconium alloy cast ingot, a high-quality Zr-Sn-Nb alloy strip for nuclear power and a preparation method and application of the high-quality Zr-Sn-Nb alloy strip. According to the method, a direct hot rolling coiling process of the zirconium alloy large plate blank is adopted, the technical parameters of hot continuous rolling of the large plate blank, namely the plate blank thickness, the hot rolling temperature, the rolling speed and the pass deformation, are mainly controlled, and the key performance such as zirconium alloy corrosion is guaranteed; according to the process, the deformation amount is increased, the basal texture is weakened, the transverse texture is improved, and the structure performance of the finished strip is improved.

The invention relates to the technical field of steel pipe manufacturing, and discloses an extra-large-wall-thickness stainless steel seamless steel pipe for an ocean platform, and the steel pipe is manufactured by adopting the following manufacturing method: step A, smelting; step B, die casting; c, forging, wherein the steel ingot is forged into a round billet; d, perforating and rolling: heating the round steel, and perforating to prepare a hollow billet; e, heat treatment, wherein fine grain treatment is conducted on the pierced billet; f, cold rolling and passivation are conducted, specifically, the steel pipe subjected to heat treatment is fed into a cold-rolling mill for finished product rolling; g, inspection is conducted, specifically, the steel pipe is subjected to final inspection; the steel pipe comprises, but is not limited to, about 0.25% of Co, about 0.15% of V, about 0.10% of Cu and about 0.045% of P. By adopting a refining process of'three-removal of molten iron and intermediate frequency furnace pre-solution, AOD, RH and die casting 'and combining an RH vacuum treatment technology, the dehydrogenation rate is more than 80%, and the content of harmful elements is effectively controlled, so that the corrosion resistance of the steel pipe is remarkably improved.

The invention provides a bend correction process for a rhenium alloy plate. According to the bend correcting process, a deformed rhenium alloy plate is subjected to grinding and polishing or cleaning treatment and then placed on a lower bottom plate of a tool clamp, one end of the plate is fixed to the lower bottom plate and assembled with an upper top plate on a cover, pressing force is applied, the tool clamp is installed on a base of electron beam melting equipment, and circulating cooling water is started; and after the vacuum is lower than 10 <-3 > Pa, preheating treatment and bending correction treatment are conducted on the rhenium alloy plate through an electron beam d, the plate is taken out and rotated by 90 degrees, polishing treatment is conducted on the rhenium alloy plate through the electron beam d after the steps are repeated, and the straight rhenium alloy plate can be obtained. The bend correction process meets the urgent requirements for the bend correction process and method of the rhenium alloy plate in academic research and application production, a good connection effect is achieved on the front-section procedure of rhenium alloy, the quality problem is solved, cost is greatly saved, and meanwhile a good machining basis is provided for subsequent machining.

The application belongs to the technical field of titanium alloy processing, and discloses a preparation method of TC4 titanium alloy bar for aerospace fasteners. The preparation method adopts the full-process temperature control and rolling production line to roll the large single heavy hot-rolled coil with uniform rolling organization and consistent performance on the basis of electron beam cold hearth furnace and vacuum consumable arc furnace smelting, including ingot smelting, forging, polishing, first rolling, centerless peeling, pickling and polishing, second rolling and the like. The finished bar with a diameter of 6-21 mm is prepared through drawing, peeling, sawing, heat treatment and other machining processes. Compared with the preparation of finished bar by transverse rolling mill hot-rolled bar, the TC4 titanium alloy bar for fasteners prepared by the method has more uniform organization performance and higher microstructure grade, and is more in line with the service requirements of the fastener factory upsetting and the finished fastener.

The application relates to the technical field of titanium alloy deformation heat treatment and microstructure performance regulation, and discloses a multi-direction forging method with temperature and deformation amount of alpha+beta titanium alloy being cooperatively and step by step reduced, which adopts a process of step by step temperature reduction and three-direction vertical deformation matching: square blank of alpha+beta titanium alloy is prepared and surface cleaning is carried out, first, compression deformation of 40%-50% is carried out along the X direction under the condition that the temperature is 5-20 DEG C higher than the beta transformation temperature of the alloy, then, compression deformation of 30%-40% is carried out along the Y direction after the temperature is reduced to the range of 50 DEG C below the beta transformation temperature, and then, compression deformation of 20%-30% is carried out along the Z direction after the temperature is continuously reduced to the range of 100 DEG C below the beta transformation temperature, the three directions are perpendicular to each other, and air cooling is carried out to room temperature after deformation; the application solves the problems in the prior art that the alpha+beta titanium alloy forging cannot consider the deformation plasticity and microstructure refining effect, the performance promotion depends on component adjustment, the process is complex, and the effect of the synergistic promotion of strength and plasticity is poor.

The application discloses a pulse current-based crack-free heat treatment method for additive manufacturing of high-temperature alloy, and belongs to the technical field of heat treatment of additive manufacturing of high-temperature alloy. The application aims to solve the technical problem that nickel-based high-temperature alloy manufactured by additive manufacturing is prone to cracking during the heating process of stress relief heat treatment. The application directly heats the workpiece by using pulse current, and the average heating rate of the workpiece is not less than 100 DEG C / s by applying high-density pulse current, so that the superfast heating far exceeding traditional furnace heat treatment is realized, thereby the precipitation of harmful phase at the grain boundary during the heating process is inhibited, and the cracking problem in the stress relief heat treatment process is fundamentally avoided. The method is especially suitable for nickel-based high-temperature alloy such as IN738LC.

This invention discloses a method for preparing oxygen-free copper, relating to the field of metallurgical technology, comprising the following steps: Step S1, raw material pretreatment; Step S2, gradient melting and deoxidation; Step S3, gradient refining; Step S4, directional solidification casting; Step S5, heat treatment. The oxygen-free copper prepared by this method exhibits good mechanical properties, excellent electrical conductivity and heat resistance, and low oxygen content.

The present application relates to the technical field of metal material hot working, in particular to a pulse electromagnetic force application mode decision method for super high strength steel hot forming. The method comprises obtaining geometric characteristic parameters of a part to be formed, initial performance parameters of a plate and process target performance parameters; inputting the above parameters into a pre-trained decision model; outputting pulse electromagnetic force application control parameters for the hot forming process from the decision model, the control parameters including a time sequence scheme, a spatial action mode and an energy intensity scheme of pulse electromagnetic force application; and controlling a pulse electromagnetic force generating device to perform corresponding operations according to the control parameters. The method realizes intelligent and global collaborative decision of pulse electromagnetic force application timing, spatial action position and energy size through an artificial intelligence model, can automatically generate an optimal application strategy matched with a specific part and process condition, and significantly improves the forming quality, microstructure performance and process consistency of super high strength steel hot formed parts.

This invention relates to the field of sheet metal processing equipment, and discloses a multi-source ultrasonic friction stirring processing device, including a fixed outer cylinder, a stationary shoulder, an ultrasonic probe, an amplitude transformer, a transducer, a first ultrasonic generator, a tool holder, a stirring head, an amplitude transformer transducer, a conductive slip ring, a second ultrasonic generator, and a feeding mechanism. The lower end of the fixed outer cylinder is connected to the stationary shoulder. The tool holder is located inside the fixed outer cylinder. The stirring head is connected to the lower end of the tool holder, and the lower end of the stirring head is flush with the lower end of the stationary shoulder. A stirring needle is provided at the lower end of the stirring head. The ultrasonic probe, amplitude transformer, transducer, and first ultrasonic generator are connected sequentially, and the ultrasonic probe is connected to the stationary shoulder. The amplitude transformer transducer is located on the tool holder. The conductive slip ring is sleeved and connected to the outside of the amplitude transformer transducer and is electrically connected to the second ultrasonic generator. The feeding mechanism communicates with the interior of the stationary shoulder. This invention can smoothly promote material softening and flow, reduce material rheological stress, and prevent a significant temperature increase.

The invention relates to the technical field of aluminum alloy plate preparation, in particular to a continuous-extrusion and continuous-rolling aluminum alloy ultrathin plate coil stock and a preparation method thereof.The preparation method comprises the following steps that S1, recycled aluminum alloy waste is pretreated; s2, the pretreated aluminum alloy waste and a raw material pure aluminum ingot are heated and melted, and initial alloy liquid is obtained; s3, a composite refining agent is added into the initial alloy liquid for refining, and refined alloy liquid is obtained; s4, casting the refined alloy liquid into a short bar; s5, the short bar is preheated and extruded, and an aluminum alloy plate is manufactured; and S6, the aluminum alloy plate is pressed and rolled, and the aluminum alloy ultrathin plate roll material is obtained. According to the technical scheme, efficient reutilization of the aluminum alloy waste and preparation of the high-quality ultra-thin plate are achieved, and the mechanical property of the ultra-thin plate coil stock prepared from the aluminum alloy waste can be effectively improved.

This invention belongs to the field of aluminum frame manufacturing technology for solar photovoltaic panels. Specifically, it proposes a manufacturing process for aluminum frame profiles for solar photovoltaic panels, including: selecting aluminum alloy as the raw material and pre-treating it; placing the raw material in an extruder, setting the extrusion temperature to 400-500℃ and the extrusion ratio to 20-30, and performing extrusion molding using an extrusion die; after the profile cools and hardens, opening an injection groove on the inner surface of the profile's connecting cavity to facilitate subsequent bonding and assembly with the photovoltaic panel; immersing the profile in an electrolyte for anodizing; placing the anodized profile in a sealing liquid for sealing; inspecting the sealed profile, and conveying profiles that meet the inspection standards to an assembly table for assembly with the photovoltaic panel. This invention improves the overall performance of the aluminum frame profile by simultaneously quenching and anodizing the profile during the extrusion molding process.

The present invention relates to the field of alloy forging technology, and is a method and system for improving the organizational properties of titanium alloy forgings based on annealing temperature, comprising: obtaining performance weight distribution; performing stress distribution identification operation on forging process information to obtain a stress distribution matrix, and performing weighted calculation on initial two-phase distribution information according to the stress distribution matrix to obtain two-phase distribution information of forgings; performing feature extraction operation on the two-phase distribution information of forgings to obtain a two-phase distribution feature set, and performing a local annealing prediction operation based on two-phase recovery according to the two-phase distribution feature set to obtain a local annealing step and a predicted primary recovery two-phase distribution; performing a global annealing prediction operation on the predicted primary recovery two-phase distribution according to the performance weight distribution and the initial two-phase distribution information to obtain a global annealing step; and performing an annealing operation according to the local annealing step and the global annealing step. The present invention can maximize the organizational properties of titanium alloys through annealing treatment according to the application scenario of forgings.

The invention relates to the technical field of aluminum foil production, in particular to a production method of regenerated aluminum alloy foil for an adhesive tape, which comprises the following steps of: 1, smelting and casting aluminum alloy waste into an aluminum alloy cast ingot; 2, the aluminum alloy cast ingot is subjected to surface milling treatment; 3, the aluminum alloy cast ingot is subjected to soaking treatment; 4, the aluminum alloy cast ingot is subjected to hot rolling treatment; 5, the aluminum alloy coiled material is subjected to cold rolling treatment; 6, intermediate annealing treatment is conducted on the aluminum alloy coiled material; 7, cold foil rolling treatment is conducted on the aluminum alloy coiled material; and 8, annealing treatment is conducted on the aluminum alloy foil finished product. The defects of the aluminum alloy foil for the adhesive tape caused by pinholes and holes can be effectively prevented; meanwhile, composition segregation of the aluminum alloy cast ingot is effectively eliminated, and the internal stress of the aluminum alloy cast ingot is reduced; and growth of crystal grains in a high-temperature state is effectively avoided, and the structure performance of the crystal grains is improved.

The invention discloses a 13MnNiMoR thick steel plate for a boiler drum, which is characterized by comprising the following components in percentage by weight: 0.12 to 0.15 percent of C, 1.30 to 1.50 percent of Mn, 0.20 to 0.40 percent of Si, less than or equal to 0.015 percent of P, less than or equal to 0.005 percent of S, 0.010 to 0.020 percent of Nb, 0.020 to 0.040 percent of V, 0.20 to 0.40 percent of Cr, 0.20 to 0.40 percent of Mo, 0.80 to 1.00 percent of Ni, 0.020 to 0.050 percent of Alt, 0.030 to 0.050 percent of Nb + V and the balance of Fe and impurities, and a production method of the 13MnNiMoR thick steel plate comprises a steelmaking process, a blank heating process, a rolling process and a tempering heat treatment process. According to the method, the large rolling reduction technology that the large-thickness continuous casting billet guarantees the rolling compression ratio of 3 times or above, Nb + V microalloying is conducted, and the reduction of three passes is guaranteed to be larger than or equal to 38 mm through one-stage rolling is adopted, the continuous casting billet rolling thickness is larger than 100-150 mm, the 13MnNiMoR thick steel plate for the boiler drum is completed, the steel plate is excellent in performance, the 0-DEG C impact at the position with the thickness being 1 / 4 is larger than or equal to 200 J, the 0-DEG C impact at the center is larger than or equal to 150 J, meanwhile, the production process is simple, and the production cost is low. And the production cost is low, and economical and efficient production of steel plates can be achieved.

This utility model discloses a heat treatment device for a large-megawatt planetary carrier in wind power. The heat treatment device includes a heat treatment furnace, an automatic lifting furnace door, a detachable heat treatment trolley, a liftable air-blocking device, a trolley running track, and a trolley rotation lifting air-cooling device. The heat treatment device has two sets, left and right. The automatic lifting furnace door is located on the side near the trolley rotation lifting air-cooling device. The detachable heat treatment trolley is placed in the cavity inside the heat treatment furnace. A liftable air-blocking device is installed below the detachable heat treatment trolley. The trolley rotation lifting air-cooling device is located on one side of the heat treatment furnace. By introducing the detachable heat treatment trolley, the automated lifting furnace door, and the air-cooling device, this equipment can achieve efficient integration of heat treatment and air cooling, reducing manual operation time and labor intensity, and significantly improving overall production efficiency.

The invention discloses an aluminum alloy for preparing a split axle box body of an external bogie of a train and a preparation method of the aluminum alloy, and belongs to the technical field of alloys for high-speed trains. The aluminum alloy comprises Zn, Mg, Si, Cu, Ca, Zr, Ti, Mn, Y, Al and other elements. When the aluminum alloy is prepared, one-time homogenization treatment, one-time thermoplastic deformation processing treatment and two-time superplastic die forging treatment are carried out; wherein the homogenization treatment can eliminate residual stress and defects, such as dendritic crystals, in the cast ingot, and improve the overall structure performance of the alloy, so that the solid solubility of a coarse compound phase in the alloy is improved; the thermoplastic deformation processing treatment and the twice superplastic die forging treatment can further eliminate new segregation and stress concentration caused by deformation, so that the microstructure of the alloy is more uniform.

The application discloses a kind of semi-solid extrusion forming thin-walled component device and method, it is related to metal processing technical field, the device of semi-solid extrusion forming thin-walled component disclosed in the application includes preprocessing unit, extrusion unit and heat treatment unit, preprocessing unit includes first gradient heating temperature control device and preprocessing mould, extrusion unit includes second gradient heating temperature control device and extrusion mould, heat treatment unit includes third gradient heating temperature control device and heat treatment carrier, the method of semi-solid extrusion forming thin-walled component disclosed in the application includes obtaining cylindrical semi-solid blank, preheating, spraying lubricant, remelting heating, extruding thin-walled component and heat treatment;Semi-solid extrusion forming thin-walled component device and method disclosed in the application reduce the extrusion force requirement, with good forming effect.

The invention relates to the technical field of alloy forging, in particular to a titanium alloy forge piece structure performance improving method and system based on the annealing temperature. Performing stress distribution identification operation on the forging process information to obtain a stress distribution matrix, and performing weighted calculation on the initial two-phase distribution information according to the stress distribution matrix to obtain two-phase distribution information of the forge piece; performing feature extraction operation on the two-phase distribution information of the forge piece to obtain a two-phase distribution feature set, and performing local annealing prediction operation based on two-phase recovery according to the two-phase distribution feature set to obtain a local annealing step and predict primary recovery two-phase distribution; according to the performance weight distribution and the initial two-phase distribution information, performing global annealing prediction operation on the predicted primary recovery two-phase distribution to obtain a global annealing step; and carrying out annealing operation according to the local annealing step and the global annealing step. According to the forging application scene, the titanium alloy structure performance can be improved to the maximum extent through annealing treatment.