18514 results about "Heat treating" patented technology

The invention relates to the technical field of welding deformation control, and discloses a multi-stage adjusting method and system for steel structure welding deformation control. The method comprises the steps that steel member parameters are measured, a welding deformation prediction model is established, and pre-deformation data are obtained; performing accurate pre-deformation processing according to the data; executing segmented welding and recording a temperature field and a deformation amount; performing local heat treatment on the high-stress area to obtain stress distribution; correcting a deformation area by using multi-point force; and performing precision detection and quality evaluation according to the corrected data to form a control file. According to the method, high-precision control over welding deformation of the complex steel structure is achieved through data transmission and feedback adjustment of all stages.

The invention provides a green and environment-friendly steel wire rod for a 2300 MPa grade steel strand and a production method of the green and environment-friendly steel wire rod. The steel wire rod comprises, by weight, 0.95%-1.05% of C, 0.20%-0.40% of Si, 0.60%-0.90% of Mn, 0.10%-0.40% of Cr, smaller than or equal to 0.030% of V, smaller than or equal to 0.015% of P, smaller than or equal to 0.010% of S, 0.01%-0.04% of Al and the balance Fe. Through the special design of the components and through the processes of converter blowing, LF refining, RH refining, continuous casting, flaw detection and coping, high-speed wire rod rolling, online heat treatment and aging treatment, the strength of a steel strand finished product manufactured after an obtained wire rod is subjected to drawing, twisting and stabilizing treatment reaches 2300 MPa, and the tensile strength of the steel strand finished product reaches 2300 MPa. Meanwhile, the properties such as yield strength and elongation all meet the requirements, and the production method is efficient, green and energy-saving.

The invention discloses an intelligent production method of a corrosion-resistant pressing rivet nut in the technical field of information, which comprises the following steps: carrying out surface treatment on the pressing rivet nut subjected to heat treatment, selecting a zinc plating or nickel plating process according to the corrosion resistance requirement of a product, and obtaining a uniform and compact plating layer by controlling the parameters of the temperature and the concentration of a plating solution and the electroplating time, the plating layer quality is detected by adopting a plating layer thickness meter and an adhesive force tester, the pre-plating treatment and post-plating treatment processes are optimized, and the protection performance and the appearance quality of the plating layer are improved; integrating a surface defect detection result with other performance indexes to serve as a comprehensive evaluation basis of product quality, establishing a correlation model of pressure riveting nut performance detection data and material attributes, a heat treatment process and a surface treatment process, mining an influence rule of each element on the product performance by adopting a correlation rule mining and time sequence prediction method, and determining the quality of the product. And predicting product performance distribution under different production parameter combinations.

The invention relates to the technical field of process optimization, and discloses a hot work die steel heat treatment process optimization method and system.The method comprises the steps that hot work die steel samples are collected under multiple sets of different process conditions, and a performance basic data set is obtained; constructing a multi-target coordination optimization model based on the performance basic data set; performing phase change detection on the hot work die steel sample to obtain phase change monitoring data; performing prediction in combination with the phase change monitoring data to obtain a performance prediction result; and solving an optimal process parameter combination based on the performance prediction result and the multi-target coordinated optimization model, and realizing simultaneous optimization and coordinated balance of a plurality of performance indexes in the heat treatment process of the hot work die steel by making full use of associated information among different performance indexes.

The invention discloses a processing method of a fusion device, and belongs to the technical field of nuclear fusion. The processing method comprises the following steps: carrying out at least one time of vacuum heat treatment on a Dewar embedded part blank; carrying out cleaning anti-corrosion treatment and physical correction treatment on the surface of the dewar embedded part blank subjected to heat treatment; carrying out grinding and polishing treatment on the surface of the Dewar embedded part blank subjected to the cleaning and antiseptic treatment and the physical correction treatment to obtain the Dewar embedded part; the Dewar embedded part is transported to the installation position of the window to be installed, and the Dewar embedded part located at the installation position is temporarily fixed; performing concrete pouring on the mounting position of the Dewar embedded part; and after the concrete is solidified, a cast-in-place concrete structural body is formed in the area below the Dewar embedded part, and a part of the Dewar embedded part is embedded into the cast-in-place concrete structural body. By means of the method, the magnetic conductivity of the Dewar embedded part is reduced, and the risk that elements are activated to form isotopes with the long decay period and the high irradiation dose rate or isotopes with the short decay period and the high irradiation dose rate is reduced.

The GPa-grade ultrahigh-strength anti-fatigue steel comprises the following chemical components in percentage by weight: 0.02 to 0.07 percent of C, 0.10 to 0.25 percent of Si, 1.75 to 2.50 percent of Mn, 0.022 to 0.026 percent of P, less than or equal to 0.008 percent of S, 0.03 to 0.04 percent of Nb, 0.09 to 0.15 percent of V, 0.045 to 0.055 percent of Ti, 0.50 to 0.80 percent of Mo, 2.00 to 2.40 percent of Cr, 8.0 to 10.0 percent of Ni, 8.0 to 12.0 percent of Co, 0.035 to 0.045 percent of Als, 0.013 to 0.014 percent of N, 0.58 to 0.62 percent of Cu, 0.03 to 0.05 percent of Sb, 0.03 to 0.05 percent of RE and 0.0008 to 0.001 percent of B. The method comprises the steps of smelting, continuous casting, rapid cooling, casting blank heating, rolling and heat treatment. The maximum thickness of the steel plate is 100mm, Rp0.2 is 1080-1120MPa, A is greater than or equal to 18%, and the fatigue life gt under the peak stress of 560MPa; the impact energy at-60 DEG C is greater than or equal to 150J, and the marine atmosphere corrosion resisting rate is 1t; and 0.10 mm / a. The strength of the steel is improved, the impact toughness of the steel plate at low temperature is improved, and the corrosion resistance and the fatigue resistance of the steel are improved.

The invention relates to a high-strength complex-phase hot-rolled wire rod for a 2100MPa-grade stranded wire and a manufacturing method of the high-strength complex-phase hot-rolled wire rod, after a C-Si-Mn-Cr-Mo high-carbon component system is rolled and spun into a wire rod, the wire rod is subjected to online molten salt strong quenching isothermal treatment, so that the wire rod is firstly subjected to front-section molten salt treatment and is cooled at a cooling speed of greater than or equal to 33 DEG C / s, and enters a bainite phase region from an austenite state; the method comprises the following steps: firstly, carrying out first-stage molten salt treatment to promote transformation of austenite into bainite, then carrying out later-stage molten salt treatment to form a structure mainly comprising bainite, carrying out isothermal tempering on the structure, reserving part of untransformed retained austenite, and finally, carrying out roller way slow cooling to promote transformation of the untransformed retained austenite into martensite, and carrying out tempering, the microstructure of the hot-rolled wire rod comprises a complex-phase structure composed of tempered bainite and tempered martensite, the tensile strength of the hot-rolled wire rod can reach 1435-1485 MPa, the percentage reduction of area of the hot-rolled wire rod is 31%-36%, off-line heat treatment of follow-up machining is avoided, and the risk of wire breakage is reduced.

The invention relates to the technical field of injection molds, in particular to an intelligent parameter recommendation method and system for a precise injection mold production process, and the method comprises the steps: carrying out the intelligent parameter recommendation of the precise injection mold production process based on the historical heat treatment data, mold geometric feature data, material characteristic data and environmental factor data of a precise injection mold, and the real-time mold deformation in the production process of the injection mold; a mold deformation prediction model is constructed and trained to predict the deformation quantity of the precise injection mold in the heat treatment process, and the predicted mold deformation quantity is obtained; calculating a first compensation coefficient in combination with the historical heat treatment data, the mold geometric feature data, the material characteristic data, the environmental factor data and the predicted mold deformation quantity; the first compensation coefficient is optimized by comparing the real-time mold deformation quantity with the predicted mold deformation quantity, and a second compensation coefficient is obtained; and optimizing the initial intelligent parameter recommendation scheme according to the second compensation coefficient, and performing parameter recommendation through the optimized intelligent parameter recommendation scheme.

Disclosed is a robot welding assembly mechanism and an application in annular welding seam detection and postweld heat treatment. The robot welding assembly mechanism comprises a rotatable column. A plurality of transverse clamping portions are disposed at intervals on the column. A height-adjustable first V-shaped support portion is disposed at a periphery of the column. The first V-shaped support portion is mounted on a radial track. An annular track is disposed on an outer side of the radial track. A plurality of height-adjustable second V-shaped support portions are disposed on the annular track. The first V-shaped support portion and the second V-shaped support portions are capable of supporting a non-welded portion of the welded workpiece. A first driving mechanism of the rotation base, a second driving mechanism of the transverse clamping portions, and a third driving mechanism of each of the second V-shaped support portions are connected with a control system.

The invention relates to a hot-rolled wire rod for a 2260MPa-grade stranded wire and a manufacturing method of the hot-rolled wire rod, after the high-carbon component design of C-Si-Mn-Cr-Mo-Nb-Al is adopted for rolling and spinning to form the wire rod, online molten salt isothermal toughening treatment is carried out, so that the wire rod is firstly subjected to front-section molten salt treatment and is rapidly cooled, and enters a sorbite phase region from an austenite state to form a structure taking a sorbite structure as a main structure; and then carrying out rear-section molten salt treatment, reducing the circulation volume of molten salt, promoting the unconverted retained austenite to be continuously converted into sorbite, carrying out isothermal tempering, promoting fusing of a part of sorbite lamellar layers, and finally carrying out slow cooling through a roller way, so as to prepare the hot-rolled wire rod of which the microscopic structure comprises a mixed structure consisting of tempered sorbite, ferrite and fused sorbite, the tensile strength can reach 1534-1584 MPa, the percentage reduction of area can reach 33%-38%, and the alloy can be used in the application fields of manufacturing 2260 MPa grade stranded wires and the like without additional heat treatment procedures.

The invention discloses a method for homogenizing a microstructure of a low-temperature high manganese steel welding heat affected zone by using pulse current, and belongs to the technical field of welding and postweld heat treatment of high manganese steel for liquefied natural gas (LNG) storage and transportation. The treatment method comprises the following steps: (1) sampling a heat affected zone of the low-temperature high-manganese steel welded joint with microstructure gradient distribution; (2) the low-temperature high manganese steel welding heat affected zone sample is subjected to pulse current treatment at the room temperature, the pulse frequency ranges from 0.6 kHz to 6 kHz, the pulse width ranges from 0.2 ms to 6 ms, the current density ranges from 20 A / mm < 2 > to 200 A / mm < 2 >, and the treatment time ranges from 5 min to 120 min; and (3) grinding and polishing the sample, observing and analyzing the element distribution state in the heat affected zone, and quantitatively representing the grain boundary structure characteristics. According to the method, atomic diffusion, dislocation slippage and grain boundary migration of the low-temperature high-manganese steel welding heat affected zone can be promoted by applying the pulse current, redistribution of segregated atoms and dislocations in grains and at grain boundaries is rapidly achieved, and then the purposes of improving the microstructure uniformity of the low-temperature high-manganese steel welding heat affected zone and improving the impact toughness of the low-temperature high-manganese steel welding heat affected zone are achieved. The method is easy to operate, short in treatment time, environmentally friendly and particularly suitable for postweld treatment of low-temperature high manganese steel parts.

The invention discloses a bevel gear forming grinding temperature prediction method and system and a storage medium, and the method comprises the steps: analyzing a bevel gear heat treatment process, and building a multi-field coupling finite element simulation model of a gear heat treatment process including carburizing, quenching and tempering; and calculating non-uniform tooth surface deformation caused by thermal stress, structural stress and inconsistent surface hardening layer depth. Taking a gear model after heat treatment as an initial model of a gear forming and grinding process, taking a grinding heat flux density three-dimensional distribution result as a thermal load, and combining with a gear forming and grinding geometric contact relationship to establish a helical gear forming and grinding continuous finite element simulation model considering the influence of initial tooth surface non-uniform deformation; and calculating to obtain the temperature distribution of the ground workpiece. According to the method, the influence of the heat treatment process on gear forming grinding can be comprehensively considered, the tooth surface temperature distribution of forming grinding machining is accurately predicted, and the method is crucial for analyzing the influence of the heat treatment process on grinding quality and optimizing process parameters.

The invention discloses a nano metal oxide insulating material coated soft magnetic composite material and a preparation method thereof, and the preparation method comprises the following steps: (1) putting metal soft magnetic powder and a nano metal oxide insulating material into a steel cylinder equipped with a rotating blade, and rotating the blade to drive the raw material to flow to obtain core-shell composite powder; (2) carrying out annealing treatment on the core-shell type composite powder to obtain a precursor; and (3) mixing the precursor and a lubricant, then pressing the mixture into a green body, and carrying out annealing heat treatment on the green body in a protective atmosphere to obtain the soft magnetic composite material. The prepared soft magnetic composite material is uniform in insulating layer and high in coverage rate, the binding force between the nano metal oxide and the metal soft magnetic matrix is high, the thickness of the coating layer is controllable, the obtained soft magnetic composite material has high magnetic conductivity and lower loss, and the insulating coating method is mild in process condition, simple in equipment, short in coating treatment time, high in efficiency, low in cost and suitable for industrial production. The method is suitable for large-scale production.

The present application relates to the technical field of glass-ceramics, in particular to a lithium-free transparent spinel glass-ceramics, a preparation method and application thereof. The lithium-free transparent spinel glass-ceramics is obtained by heat treatment of a base glass, and spinel crystal is the main crystal phase. The composition of the glass-ceramics contains the following oxides in mol%: SiO2 38.00-48.00%, Al2O3 25.50-30.00%, ZrO2 3.00-5.00%, MgO 5.00-8.00%, ZnO 8.00-14.00%, Na2O 7.20-14.00%, B2O3 3.00-8.00%, K2O 0-2.00%, and Y2O3 0-1.00%, and basically no Li2O. The glass-ceramics of the present application does not use high-cost lithium, and can obtain excellent surface and deep stress characteristics and excellent drop impact resistance through chemical strengthening.

The invention discloses a method for converting a waste wind power blade composite material into silicon carbide, which comprises the following steps: mixing waste wind power blade composite material powder with a conductive agent to obtain a mixture, the waste wind power blade composite material comprising a silicon element and a carbon element; and performing flash Joule heat treatment on the mixture to obtain the silicon carbide. According to the method, the waste wind power blade composite material powder does not need to be subjected to any pretreatment such as pyrolysis, the waste wind power blade composite material can be converted into the silicon carbide with the high additional value only through one-step flash Joule heat treatment in the presence of the conductive agent, and the process steps are simple; and meanwhile, the flash Joule heat treatment is an electric heating pulse rapid high-temperature treatment mode, so that the time consumption is very short, and the method is energy-saving, efficient and environment-friendly.

The invention relates to the technical field of driving shaft machining, and discloses conveying equipment for heat treatment of an automobile driving shaft. The quenching device comprises a conveying mechanism used for conveying the driving shaft and a quenching mechanism used for heating and cooling the driving shaft, a plurality of limiting frames capable of moving in a telescopic mode are arranged on the conveying mechanism, and each limiting frame comprises a sliding strip and two shaft frames which are arranged on the sliding strip and used for containing and limiting the driving shaft. Therefore, the conveying mechanism can stably convey the driving shaft, and meanwhile quenching of the quenching mechanism on the driving shaft is not affected. The quenching mechanism comprises an induction heating coil which is arranged above the conveying mechanism and can move transversely and an ejector rod used for limiting axial movement of the driving shaft. The conveying mechanism is improved and combined with the quenching mechanism, so that the heat treatment process of the driving shaft can be automatic and streamlined, and the quenching efficiency of the driving shaft is improved while the quenching effect of the driving shaft is ensured.

The invention discloses a wafer composite film and a preparation method thereof, and belongs to the technical field of semiconductor preparation. The method comprises the following steps: (1) performing hydrogen ion or hydrogen-helium mixed ion implantation on a piezoelectric wafer to obtain an implanted wafer, wherein the implanted wafer sequentially comprises a thin film layer, an implanted layer and a residual layer; (2) sequentially forming a defect layer and an isolation layer on the supporting substrate; (3) bonding the isolation layer and the thin film layer of the injected wafer to obtain a bonding body; and (4) laser is adopted to heat the injection layer, then annealing heat treatment is carried out on the bonding body to achieve complete stripping, polishing and cleaning of the film, then the wafer composite film is obtained, the wavelength of the laser is 100-700 nm, the power of the laser is 50 mw to 100 w, and the scanning speed of the laser is 10-50 mm / s. According to the method, complete stripping of the composite film and combination of laser and thermal annealing processes can be effectively achieved, the method has high process stability, the yield of the composite film can be greatly improved, and the processing time cost of the composite film is shortened.

An electrode manufacturing system includes a transferring part, a coating part, a drying part, and a heat treatment part. The transferring part is arranged downstream of the drying part to heat the electrode substrate to a high temperature and includes a transfer roller supports and transfers an electrode substrate in a long-sheet shape. The coating part applies an electrode slurry to an electrode current collector. The drying part dries the electrode slurry disposed on the electrode substrate. The heat treatment part is disposed downstream of the drying part along a transfer direction of the electrode substrate and applies heat to the electrode substrate to increase the adhesion of the electrode by changing the crystal phase of the PVdF binder of the electrode substrate during the heat treatment process, thereby preventing the separation of the electrode active material layer. A manufacturing method including the same is also provided.

The invention relates to the field of forging processes, and discloses an efficient forging process for an output shaft shared by ship accessories and mining machinery, which comprises the following steps of: 1, simulating the stress condition of a mold by adopting finite element analysis through mold design and optimization, ensuring uniform stress of the mold, and avoiding mold wear and material segregation; secondly, the forging force and the deformation rate are precisely controlled through a numerical control forging machine tool, so that stable control over the forming precision of the forge piece is achieved; thirdly, a composite forging process is adopted, wherein the composite forging process comprises a pre-forging process and a precision forging process; 4, optimizing a heat treatment process; and 5, monitoring temperature, stress and deformation data in real time in cooperation with an intelligent temperature control and monitoring system. The forging force and the deformation rate are precisely controlled through the numerical control forging machine tool, the high consistency of the shape and the size of the forge piece in the forging process is guaranteed, error accumulation in the forging process is avoided, and the forming precision of the forge piece is improved.

The invention discloses a preparation method of a heterogeneous-heterogeneous double structure of a high-strength copper / steel composite board, which comprises the following steps: realizing metallurgical bonding between copper and steel heterogeneous metals through the synergistic effect of a laser energy field and a rolling force, and promoting formation of a martensite structure near a composite interface; then, the surface of the steel side is subjected to online heat treatment through a flat-topped laser beam, and the purposes that the outer surface layer structure of the steel side is completely converted into martensite, the martensite structure at a bonding interface is converted into tempered sorbite, the residual stress of the copper side is reduced, and a heterogeneous structure with the grain size in gradient distribution is formed on the copper side are synchronously achieved; the tensile strength, the interface bonding strength and the toughness of the copper-steel composite plate are synergistically improved.

The invention relates to a 1300MPa-grade nickel-based alloy for a second-generation high-temperature superconducting baseband and a preparation method of the 1300MPa-grade nickel-based alloy, and belongs to the technical field of materials. The high-strength wear-resistant steel comprises the following chemical components in percentage by weight: 15.0%-17.0% of Cr, 15.0%-17.0% of Mo, 3.0%-4.5% of W, 5.0%-7.0% of Fe, 0.3%-0.7% of Mn, 0.01%-0.05% of Si, 0.1%-0.2% of V, 0.1%-0.5% of Co, 0.1%-0.2% of Al, 0.040%-0.080% of N, Clt and the balance of Fe. 0.002%, Plt; 0.005%, Slt; 0.002%, Olt; 0.002%, and the balance being nickel. The purification smelting process is adopted, the oxygen content in the alloy is reduced, the inclusion content is controlled, and the high purity of the material is guaranteed. By adopting the component control strategy, the heat treatment process and the final cold machining preparation, the nickel-based alloy with the yield strength being 1100 MPa or above, the tensile strength being 1300 MPa or above, the ductility being 15% or above and the product of strength and elongation being 20 GPa.% or above can be obtained after annealing is conducted for 5 min at the temperature of 900 DEG C, and the requirements of a second-generation high-temperature superconducting high-performance metal base band are met.

The present invention relates to the technical field of steel plate production, and particularly to a thick steel plate for high-strength storage tanks with a low ductile-brittle transition temperature and a preparation method thereof. The chemical components in the steel are as follows: C: 0.22% - 0.26%, Si: 0.13% - 0.144%, Mn: 0.73% - 0.92%, P≤0.015%, S≤0.01%, Cr: 0.03% - 0.049%, V: 0.01% - 0.019%, Nd: 0.00016% - 0.00047%, and the balance is Fe and impurities. Microalloying is used to ensure the excellent internal structure and service performance of the steel plate; the purity of the molten steel is improved by optimizing the smelting process; the internal structure of the steel plate is optimized and the plate shape is improved by adopting a four-stage slab heating process and a three-stage controlled rolling process; the simulated post-weld heat treatment process is used to improve the strength-ductility matching and adjust the microstructure of the material, ensuring the low-temperature service performance of the steel plate in the full thickness direction.

The invention relates to the technical field of additive manufacturing, and particularly provides a heat treatment method of a nickel-based superalloy for additive manufacturing. The heat treatment method comprises the following steps: S1, preparing a nickel-based high-temperature alloy forming part by adopting a selective laser melting process; s2, the formed part is subjected to homogenizing annealing treatment at the temperature ranging from 1000 DEG C to 1200 DEG C; s3, the formed part subjected to homogenizing annealing treatment is subjected to water quenching treatment and cooled to the room temperature; and S4, the formed part subjected to water quenching treatment is subjected to primary aging treatment at the temperature of 700-800 DEG C, then cooled to 600-700 DEG C, subjected to secondary aging treatment and then air-cooled to the room temperature. According to the method, the effect of simultaneously regulating and controlling the grain structure and the precipitated phase of the SLM-GH4169 alloy is achieved by increasing the homogenizing annealing heat treatment time, combining a water quenching cooling mode and cooperating with two-stage aging, and the strength and plasticity of the alloy are successfully and synergistically improved. According to the prepared SLM-GH4169 alloy, not only can the tensile strength reach 1400 MPa, but also the elongation at break can reach 22% or above.

The invention discloses a hard carbon material, a preparation method and application thereof and a sodium ion battery. The preparation method of the hard carbon material comprises the following steps: S1, mixing a biomass carbon source and mixed molten salt to obtain a mixture, and carrying out heat treatment on the mixture to obtain porous carbon; the mixed molten salt at least comprises two kinds of molten salt; s2, carrying out surface coating treatment on the porous carbon by adopting a coating agent to obtain a hard carbon precursor; and S3, carrying out carbonization treatment on the hard carbon precursor to obtain the hard carbon material. The obtained hard carbon material has proper pore size distribution, closed pore volume and specific surface area, has excellent electrochemical performance when being applied to the sodium ion battery, and can simultaneously take both high sodium storage capacity and excellent first effect into account. Moreover, the preparation method is low in cost, green and environment-friendly, and large-scale production is easy to realize.

The invention discloses an iron-cobalt-based amorphous nanocrystalline soft magnetic alloy and a preparation method thereof, and relates to the technical field of nanocrystalline alloys.The iron-cobalt-based amorphous nanocrystalline soft magnetic alloy comprises an amorphous matrix and nanocrystalline distributed on the amorphous matrix in a dispersed mode, the chemical expression of the iron-cobalt-based amorphous nanocrystalline soft magnetic alloy is FexCoySiaBbPcCdCue, x, y, a, b, c, d and e in the formula respectively represent the atom percentage content of all corresponding components, wherein 6 < = c < = 10, 0 < = e < = 1, and x + y + a + b + c + d + e = 100. The preparation method comprises the following steps: mixing the raw materials according to the atomic percentage, smelting, preparing a molten master alloy ingot into an amorphous alloy strip by adopting a single-roller quenching method, cutting, wrapping with tinfoil, and carrying out annealing heat treatment in an annealing furnace. According to the iron-cobalt-based amorphous nanocrystalline magnetically soft alloy, a wide heat treatment process window can be obtained through component regulation and control, the iron-cobalt-based amorphous nanocrystalline magnetically soft alloy can be suitable for industrial production, and the iron-cobalt-based amorphous nanocrystalline magnetically soft alloy has good soft magnetic performance and can become a new material in the high-frequency working field.

The invention discloses a tailor-welding method for 1500Mpa grade aluminum-silicon coating hot forming steel, which comprises the following steps of: splicing plate materials to be welded together, and fixing through a tool clamp; under the protective atmosphere, welding wires are fed into the splicing gaps of the to-be-welded plate materials in a front wire feeding mode, and laser tailored blank welding is conducted through a laser; in the laser tailored blank laser welding process of the laser device, a laser beam advances along a welding seam in a swinging mode, and the swinging mode is circular, infinite, linear, sinusoidal, equilateral triangle, oval or rhombic circulating swinging. And carrying out heat treatment on the welded plate and then quenching. In the laser filler wire tailor-welding process, different forms of laser stirring paths and different welding process parameters are set, the liquidity of a molten pool is effectively improved, the mixing effect of metal liquid is enhanced, and components and organizations of a welding seam are distributed more evenly; meanwhile, formation of welding air holes is reduced, crack sensitivity is reduced, and the quality and performance of a welded joint are improved.

The invention discloses a preparation method of a heat-resistant aluminum alloy, the heat-resistant aluminum alloy comprises the following materials: 2.5 wt%-4.5 wt% of Cu, 7.5 wt%-9.5 wt% of Si, 0.5 wt%-1.0 wt% of Zn, less than or equal to 0.2 wt% of Mn, 0.3 wt%-0.5 wt% of Mg, less than or equal to 0.25 wt% of Fe, 0.01 wt%-0.045 wt% of Sr, 0.05 wt%-0.25 wt% of Mo, 0.05 wt%-0.25 wt% of W, 0.03 wt%-0.15 wt% of V, and the balance of Al and impurities, and the total content of the impurities is less than or equal to 0.25 wt%. According to the method, the range of 2.0 Zn + 1.5 Cu + 0.5 Mg and the range of 10 (Mo-W) / Si are designed, meanwhile, the design range of FeV and the smelting preparation process are controlled, W and Si elements react and are combined to generate a WXSiy phase, WXSiy has the excellent performance of high melting point (2220 DEG C), high wear resistance, corrosion resistance, oxidation resistance and the like, and after a formed aluminum alloy component is subjected to T6 heat treatment, the tensile strength is larger than or equal to 450 MPa, the yield strength is larger than or equal to 380 MPa, the percentage elongation after fracture is larger than or equal to 2.0%, and the hardness is larger than or equal to 135 HB. According to 250 DEG C high-temperature mechanical property tests, the tensile strength is larger than or equal to 280 MPa, the yield strength is larger than or equal to 220 MPa, the percentage elongation after fracture is larger than or equal to 4.0%, the hardness is larger than or equal to 85 HB, the comprehensive performance is higher than that of a conventional aluminum alloy forming component, and the aluminum alloy can be widely applied to parts such as heavy commercial automobile flywheel shells, gear chambers and cylinder covers working under the high-temperature working condition, replaces cast iron and achieves light weight and weight reduction.

The invention discloses a welding device for air conditioner refrigeration copper pipes, and relates to the technical field of air conditioner refrigeration copper pipe welding tools, the welding device comprises a base and a cooling box mounted on one side of the top of the base, a rotating disc is arranged in the middle of the top surface of the base, and an electric rotating chuck is mounted on the top of an annular table; a connecting assembly is installed at the telescopic end of the electric push cylinder, and a heating mechanism is installed in the U-shaped frame. A driving assembly is arranged in the cooling box; a hot melting mechanism is arranged at the bottom of the front end of the L-shaped plate, and an automatic welding mechanical arm is installed at the outer end of the sliding base. Through cooperation of the electric rotating chuck, the heating mechanism and the connecting assembly, rotary surrounding type impurity heat treatment can be conveniently achieved on the welded refrigeration copper pipe, the primary welding effect on the refrigeration copper pipe can be achieved, automatic rotating welding operation or manual welding operation can be selected according to requirements, and the welding efficiency is improved. And the copper pipes can be switched from the vertical state to the transverse state, and the applicability of the device to welding operation of different copper pipes is improved.

The invention relates to a forging-rolling combined preparation method of a high-strength and high-toughness titanium alloy small-specification bar for machining, which comprises three stages of a cogging forging step, a two-phase region forging step, and a drawing blank making and rolling forming post-heat treatment step. As-cast grains can be fully crushed; a rolling forming mode is utilized, the heating number can be effectively reduced, and the production efficiency and the batch stability are improved; and the prepared small-specification bar with the diameter being 40-80 mm can be directly machined to form a part subsequently, die forging is not needed, the production cost of the small part can be effectively reduced, and important economic and military values are achieved.

The invention relates to a high-strength complex-phase hot-rolled wire rod for a 2230 MPa grade stranded wire and a manufacturing method of the high-strength complex-phase hot-rolled wire rod. After a Nb-containing high-carbon component is used for rolling and spinning at a spinning temperature to form a wire rod, online molten salt mixing quenching isothermal treatment is carried out, so that the wire rod is firstly subjected to front-section molten salt treatment and is cooled at a cooling speed of more than or equal to 35 DEG C / s, and enters a bainite and pearlite mixed phase region from an austenite state; the method comprises the following steps: firstly, carrying out heat treatment on austenite to promote part of austenite to be converted into bainite and sorbite, then carrying out later-section molten salt treatment, increasing the molten salt temperature, promoting unconverted retained austenite to be decomposed and converted into sorbite, carrying out isothermal tempering, and finally, carrying out roller way slow cooling, so as to prepare the hot-rolled wire rod of which the microscopic structure comprises a complex-phase structure consisting of tempered bainite and tempered sorbite, the drawing and hardening capacity can be improved, the production efficiency is considered, the tensile strength is 1522-1572 MPa, and the percentage reduction of area is 29%-34%, so that off-line heat treatment is avoided, and the wire breaking risk and cost of stranded wire manufacturing are reduced.