917 results about "Cooling rate" patented technology

The invention discloses an injection molding process for a plastic part of an air purifier, and relates to the technical field of injection molding processes. Multi-area dynamic mold temperature adjustment is performed, a plurality of temperature control areas are divided according to the thin wall and curved surface structure characteristics of the plastic part, the temperature is adjusted in real time, stress concentration and deformation are remarkably reduced, and the service life of the plastic part is prolonged. The problem of shrinkage stress of a thin-wall area is solved in a targeted mode, cooling of a thick area is accelerated, meanwhile, real-time temperature control and deformation compensation are controlled in a linkage mode, the temperature and the cooling rate are dynamically adjusted according to deformation data monitored in real time, and the deformation trend is predicted, so that pre-deformation compensation is provided, warping of the thin-wall area and the curved surface area is controlled, and deformation of the thin-wall area and the curved surface area is controlled. The stability of the plastic part in the forming process is kept, and the product precision is improved; in addition, simulation prediction and mold parameter adjustment are carried out, cooling requirements of different areas are adjusted, the temperature difference between the thin wall and the curved surface area is reduced, and the whole cooling process is more efficient.

The invention belongs to the technical field of laser processing, and particularly relates to a multi-mode laser coupling high-efficiency and high-quality additive manufacturing method for a metal-based composite material, which comprises the steps of pretreatment, substrate pretreatment, multi-mode coupling laser construction, additive manufacturing and the like. High-power pulse laser is adopted as energy supply main laser to melt the metal matrix composite wire, meanwhile, flowing of a molten pool is accelerated, the nucleation rate is increased, and metal matrix composite parts are machined through the additive manufacturing method. The continuous laser is adopted to effectively slow down the cooling speed of the molten pool, and the residual tensile stress generated in the component due to rapid solidification of the molten pool is greatly reduced. Oscillating laser is adopted to improve the shape of a molten pool and reduce the number of times of transverse lap joint. According to the method, multi-mode laser coupling and cooperation with the flat-topped laser light source are utilized, and the metal-based composite material machining part with the uniform and flat surface appearance macroscopically and the stable and uniform organization structure microcosmically is obtained.

The invention discloses a preparation method and application of a lithium-rich manganese-based positive electrode material of a lithium defect type layered spinel composite phase synthesized by a rapid thermal shock method, and the preparation method comprises the following steps: firstly, preparing a lithium-rich manganese-based precursor by using a coprecipitation method; and mixing the precursor and a lithium salt, and rapidly heating the sample by using Joule heat passing through the powder sample as a heat source to obtain the layered spinel composite phase positive electrode material with lithium defects, and the lithium-rich manganese-based positive electrode material with higher lithium deficiency, a layered spinel composite structure and more excellent performance is generated through ultrafast heating and cooling rate and short-time heat preservation. According to the preparation method disclosed by the invention, the lithium-rich manganese-based positive electrode material with the composite structure, which is relatively large in lithium deficiency, is prepared through a rapid thermal shock technology and has the advantages of high capacity, high first efficiency and long cycle stability; the preparation method is simple, the material cost is greatly reduced, large-scale production can be realized, the production efficiency is improved, and the energy consumption is reduced.

The invention belongs to the field of steel rail manufacturing, and discloses a method for improving the impact toughness matching performance of a dissimilar material steel rail welding joint. The method comprises the following steps: carrying out first-stage cooling on a welding joint formed by welding the eutectoid pearlite steel rail and the bainite steel rail; carrying out full-section normalizing heating on the welded joint; the welding joint is subjected to second-stage cooling, a heat affected zone on one side of the heat treatment type eutectoid pearlite steel rail is cooled to 350-400 DEG C at the cooling rate of 4.0-7.0 DEG C / s, and a heat affected zone on one side of the hot rolling type bainite steel rail is cooled to 290-315 DEG C at the cooling rate of 2.0-3.0 DEG C / s; the welding joint is heated to a bainite transformation temperature interval for isothermal treatment; and naturally cooling the welding joint in an air environment. According to the method provided by the invention, the room-temperature impact toughness of the heat affected zone on one side of the hot-rolled bainite steel rail can be obviously improved, so that the performance of the hot-rolled bainite steel rail is better matched with that of a hot-rolled bainite steel rail base material.

The invention provides low-cost 1500MPa-grade hot-rolled high-strength steel and a preparation method, and relates to the technical field of hot-rolled high-strength steel. The thickness of the low-cost 1500MPa-grade hot-rolled high-strength steel is 4-8mm, and the low-cost 1500MPa-grade hot-rolled high-strength steel comprises the following chemical components in percentage by mass: 0.20-0.24% of C, 2.4-2.8% of Mn, 1.4-1.8% of Al, 0.3-0.4% of Si, less than or equal to 0.01% of P, less than or equal to 0.01% of S and the balance of Fe and inevitable impurity elements. The preparation method comprises the steps of raw material weighing, continuous casting, heat treatment, hot rolling and critical annealing. According to the invention, by creatively selecting alloy elements and adjusting the content, combining hot rolling and critical annealing treatment and controlling the air cooling rate, the comprehensive properties such as strength, plasticity and impact resistance of the steel plate are synergistically improved; the method is high in resource utilization rate, low in production cost, short in process, easy to operate, high in efficiency and beneficial to industrial large-scale production and popularization.

The invention relates to a high-permeability ultralow-coercive-force soft magnetic stainless steel heat treatment process which comprises the following steps: in a nitrogen atmosphere, firstly heating a hot-rolled wire rod to 900-950 DEG C at a heating rate of 30-50 DEG C / h, preserving heat for 4-6 hours to obtain a fine grain structure of equiaxial recrystallization ferrite, then cooling to room temperature at a cooling rate of less than or equal to 15 DEG C / h to homogenize the ferrite structure, and finally cooling to room temperature at a cooling rate of less than or equal to 15 DEG C / h to obtain the high-permeability ultralow-coercive-force soft magnetic stainless steel. The soft magnetic stainless steel is obtained. The method has the advantages that the maximum magnetic conductivity of the soft magnetic stainless steel is improved, the coercive force of the soft magnetic stainless steel is reduced, and the plasticity index of the soft magnetic stainless steel is improved.

The invention relates to a preparation method of beryllium-copper alloy. The preparation method comprises the following steps: (S1) accurately weighing the following raw materials by mass: copper, beryllium, copper-yttrium alloy, copper-titanium alloy, copper-manganese alloy and nano ytterbium powder; (S2) the raw materials are added into a vacuum induction furnace, the temperature is increased to 1400-1600 DEG C under the inert atmosphere, after the raw materials are completely molten, a covering agent is spread on the melt, smelting, standing and slagging-off are conducted under the stirring condition, the melt is poured into a mold under the condition of 1100-1200 DEG C, and a beryllium copper alloy ingot is obtained; and (S3) the beryllium-copper alloy ingot is subjected to face milling treatment, solution treatment, cold machining deformation treatment and aging treatment in sequence, and the product beryllium-copper alloy is obtained. A small amount of metal elements are added, aging treatment is carried out under the microwave condition, and then slow cooling is carried out at the constant cooling rate, so that the overaging phenomenon can be remarkably inhibited, the hardness of the alloy is improved, and meanwhile, the mechanical property, especially the stress relaxation resistance, is also improved.

The invention discloses a casting machining parameter optimization method and system based on real-time data analysis, and relates to the technical field of computer control, and the method comprises the steps: collecting casting surface temperature parameters and casting machining surface contour data; the casting cooling rate is calculated according to the casting surface temperature parameters, and a casting surface machining area is divided based on the casting cooling rate; analyzing the machining surface contour data of the casting, calculating a surface roughness value of the casting, and comparing the surface roughness value of the casting with a preset roughness threshold value; when the surface roughness value of the casting is larger than the preset roughness threshold value, a machining compensation instruction is sent to a numerical control machine tool; based on the temperature difference of the fast cooling area and the slow cooling area, corresponding tool rotating speed parameters are set, and casting surface finish machining is completed. According to the method, the temperature gradient distribution characteristics of the surface of the casting are accurately recognized, accurate division of a fast cooling area and a slow cooling area is achieved, a multi-dimensional surface roughness evaluation system is adopted, and accurate regulation and control of machining parameters are achieved.

The invention discloses a pipeline steel plate for carbon dioxide conveying and a preparation method thereof. In the heating procedure of the preparation method, the soaking temperature is TNbC + (40-100) DEG C, and the soaking time is 30-50 min; in the first hot rolling procedure, multiple passes are included, the plate thickness after rolling is 3.2-4.2 t, the initial rolling temperature is Tnr + (5-25) DEG C, and the final rolling temperature is Tnr + (0-20) DEG C; in the water cooling process, the final cooling temperature is Ar3-20 DEG C-Ar3 + 15 DEG C; in the second hot rolling procedure, multiple passes are included, the plate thickness t after rolling is larger than or equal to 38 mm, and the initial rolling temperature and the final rolling temperature are both Ar3-20 DEG C-Ar3 + 15 DEG C; in the ultrafast water cooling process, the water inlet temperature is larger than or equal to Ar < 3-30 > DEG C, the final cooling temperature is Bs-(460-300) DEG C, and the cooling rate is 9-22 DEG C / s; and in the air-cooling self-tempering process, the steel plate is air-cooled to the room temperature on a cooling bed.

The invention relates to the technical field of vertical furnaces, in particular to a wafer loading and unloading chamber and a vertical furnace, which comprise a wafer boat, a filter, a heat exchanger, a return pipe, a fan and a heat energy absorption part, and in the process that the wafer descends into the wafer loading and unloading chamber along with the wafer boat, the low-temperature nitrogen flows out from the nitrogen outflow hole of the filter and flows to the wafer boat and the wafer. And carrying out cooling treatment on the wafer boat and the wafer by means of low-temperature nitrogen. And then the high-temperature nitrogen flows into the heat exchanger through the nitrogen recovery hole for cooling treatment. And the cooled nitrogen flows to the filter again through the return pipe under the action of the fan to be reused. By additionally arranging the heat energy absorption part, the heat energy absorption part can quickly absorb heat energy from the wafer boat, the wafer and the environment in the wafer loading and unloading chamber, so that the cooling rate of the wafer boat and the wafer is improved, the rising amplitude of the environment temperature in the wafer loading and unloading chamber is reduced, and the service life of other equipment in the wafer loading and unloading chamber is prolonged; and potential safety hazards are reduced.

The invention discloses a control method and a preparation method for quenching deformation of a die casting, and the control method comprises the following steps: carrying out partitioned cooling on the die casting subjected to solution treatment to obtain the actual deformation of the cooled die casting; a simulation model is established, and the simulation deformation of the die casting is obtained; the simulation deformation amount is compared with the actual deformation amount; carrying out simulation optimization on the partitioned quenching cooling process of the die casting on the basis of the corrected model; performing quenching cooling test on the die casting based on the simulated and optimized partition quenching cooling process, and correcting the partition quenching cooling process based on the result of the cooling rate; performing partition quenching cooling on the die casting on the basis of the corrected partition quenching cooling process, obtaining corrected deformation of the die casting after quenching cooling, and comparing the corrected deformation with design size data of the die casting; and constraint simulation analysis is carried out on the position with the deformation degree larger than 1mm, and a constraint mode with the minimum deformation degree is obtained.

According to the multi-path cooling control method for the non-adjustable flow of the cooling spray box after hot plate rolling, the mode that an annular rail is combined with a trolley is adopted, the trolley bears a sample through a sample bearing table to do annular motion, the annular rail is an oval rail comprising two parallel linear segments and two semicircular segments, and at least one cooling spray box is arranged along the linear segment rail; the cooling area can be infinitely lengthened at any workpiece speed; according to the cooling starting temperature, the water cooling speed, the cooling stopping temperature, the cooling stopping time between the cooling areas and the production line cooling spray box layout of the N cooling areas determined by the experiment, the experiment device is configured according to different spray box opening modes, the cooling experiment is carried out, and spray box opening mode parameters corresponding to the optimal cooling speed of the N cooling areas are obtained; carrying out cooling control after rolling on corresponding sample production; besides, the method is implemented under the condition basically consistent with the actual working condition of the production line, so that the product design output and the production line process control are more accurate and efficient, the product research and development speed can be effectively increased, the process control precision is improved, and the production line trial-manufacturing cost is reduced.

The invention relates to a preparation method of an MAX phase material. According to the specific technical scheme, precursor powder materials needed for preparing the MAX phase material are mixed to obtain mixed powder, the mixed powder is subjected to mechanical ball milling and cold press forming to form a blank, a to-be-sintered blank is obtained, the to-be-sintered blank is subjected to ultra-fast Joule hot sintering, and the MAX phase material is prepared. The MAX phase material is prepared by using an ultra-fast Joule thermal sintering method, the Joule thermal sintering method has the characteristics of high heating and cooling rate (104 DEG C / min) and high heating temperature (3000 DEG C), and according to the Arrhenius formula, the synthesis rate of the MAX phase material can be greatly improved due to the characteristics of high heating and cooling rate and high heating temperature, and rapid preparation of the MAX phase material is realized. According to the method, the preparation period of the MAX phase material can be greatly shortened, so that the aging can be improved, the energy consumption can be reduced, accurate and controllable preparation can be realized, and the method has important significance on low-cost and large-scale preparation of the MAX phase material.

The utility model relates to the technical field of powder metallurgy, and particularly discloses a powder metallurgy sintering furnace which comprises a furnace body, a plurality of placing trays are fixedly connected to the inner wall of the furnace body, a furnace door is arranged at the front end of the furnace body, a cooling mechanism is arranged at the rear end of the furnace body, and the cooling mechanism is used for cooling powder metallurgy workpieces sintered in the furnace body. The cooling mechanism comprises a plurality of air inlet covers fixedly connected to the rear end of the furnace body in an inserted mode, the number of the air inlet covers is consistent with that of the containing discs, the air inlet covers are located above the containing discs, the cooling mechanism further comprises an air inlet box fixedly connected to the rear end of the furnace body, and an air inlet pipe is fixedly connected to the left side of the air inlet box in an inserted mode. Through the cooperation of the structure, cold air with low temperature circulates at each placing disc, and the air guide plate swings back and forth to achieve the purpose of air sweeping, so that workpieces on each placing disc can be uniformly cooled, the cooling effect of the workpieces is good, and the cooling rate is increased.

The invention belongs to the technical field of polymer composite materials, and particularly relates to modified polytetrafluoroethylene for a wear-resistant sealing ring and a preparation method of the modified polytetrafluoroethylene. After standing, uniformly mixing polytetrafluoroethylene with the inorganic filler and polyimide to obtain a mixture, and standing the mixture at room temperature; and 2, performing cold pressing on the mixed material after standing to form a preform, sintering the preform at high temperature to form a blank material, and processing the blank material into the sealing ring. The inorganic filler and the organic filler are mixed and added, and the sintering temperature and the cooling rate are controlled in the preparation process, so that the modified polytetrafluoroethylene has good wear resistance at a lower friction coefficient on the premise of ensuring the mechanical property of the polytetrafluoroethylene, and the modified polytetrafluoroethylene can be used in a specific working environment.

The invention discloses a crystallization process of o-chloro-p-nitroaniline, which comprises the following steps: feeding a material into a crystallization kettle to crystallize the o-chloro-p-nitroaniline, regulating and controlling the temperature in the kettle body in the crystallization process, cooling to a metastable region of the o-chloro-p-nitroaniline, preserving the heat in the metastable region for a first preset time length, and then cooling to a second preset time length; continuously cooling to a first temperature lower than the melting point of the o-chloro-p-nitroaniline, keeping the temperature at the first temperature for a second preset duration, continuously cooling to a second temperature, and outputting the material out of the crystallization kettle for filtration and separation; in the cooling process, the cooling speed in the kettle body is controlled to be 0.1-0.2 DEG C / min. According to the invention, the interior of the kettle body can be slowly cooled, and the cooling speed of each part in the kettle body can be more uniform, so that the crystallization purity and the product quality of o-chloro-p-nitroaniline are finally improved.

According to the production method of the hot-rolled copper-steel double-metal composite plate, copper is oxygen-free copper, and Cu is larger than or equal to 99.95%; the steel is low-alloy high-strength steel; the key process steps of the copper-steel composite plate comprise assembling, heating, rolling, cooling and finishing. By controlling the rolling temperature, the pass reduction rate, the cooling speed and other processes, the plate shape of the copper-steel rolled composite plate is obviously improved, the stability of the bonding surface is greatly improved, and therefore industrial production and application of the copper-steel bimetal rolled composite plate are achieved.

The invention relates to the technical field of automatic control, in particular to a PE thermal insulation pipe production equipment control method and system.The method comprises the following steps that based on raw material particle size distribution characteristics, heating temperature control parameters are adjusted, the viscosity state is recognized in combination with screw torque and rotating speed, and the feeding rate of each section is adjusted according to the viscosity difference; forming uniformity is calculated and foaming agent injection parameters are adjusted in combination with a foam structure, and flow velocity parameters of a cooling area are adjusted in combination with thermal load evaluation. According to the invention, by introducing raw material particle size analysis parameters and combining torque and viscosity change characteristics, the heating temperature control and extrusion viscosity adjustment process is optimized, the adaptability of equipment to material physical property change is enhanced, the foaming agent injection process is fed back by using foam structure distribution, the foaming uniformity and injection accuracy are improved, and the foaming efficiency is improved. And by adopting linkage analysis of heat release intensity and cooling rate, dynamic regulation and control of the cooling circulation rate are realized, and the consistency and stability of cooling shaping are improved.

The present application discloses a gas cooling apparatus and a heat furnace. The gas cooling apparatus comprises a pipeline structure. The pipeline structure defines a gas flow channel and a liquid channel; the gas flow channel is used for circulating a high-temperature gas; and the liquid channel is located outside the gas flow channel and is provided with a liquid spraying part communicated with the gas flow channel. The pipeline structure is further provided with a gas spraying part communicated with the gas flow channel; and a liquid sprayed from the liquid spraying part can be atomized under the action of the high-temperature gas in the gas flow channel and the high-pressure gas sprayed from the gas spraying part. The gas cooling apparatus has the advantages of simple structure, convenient use, rapid cooling rate for a high-temperature gas, and less use of a cooling liquid.

The utility model discloses a stable and reliable improved die-casting die which comprises a base, a top seat is arranged on the top of the base, a die-casting bottom die is fixedly installed at the top end of the base, a die-casting top die is fixedly installed at the bottom of the top seat, a forming cavity is formed in the die-casting top die, and a forming male die matched with the forming cavity is arranged on the top of the die-casting bottom die. Wrapping clamping frames are installed on the outer side of the die-casting bottom die and the outer side of the die-casting top die correspondingly, cooling cavities are formed in the wrapping clamping frames, a supporting frame is fixedly connected to the bottom of the base, a water storage tank is installed in the middle of the supporting frame, a second water pump is installed on one side of the bottom of the inner wall of the water storage tank, and a first water pump is installed on the other side of the bottom of the inner wall of the water storage tank; according to the stable and reliable improved die-casting die, the cooling rate of metal in the die-casting bottom die and the die-casting top die is increased, and the production and machining efficiency of products is improved.

The invention provides a cubic tin selenide-based thermoelectric crystal and a preparation method thereof, and relates to the technical field of crystal synthesis. The preparation method comprises the following steps: weighing tin, silver, antimony and selenium simple substances, putting into a first container, vacuumizing and sealing; raising the temperature of the first container to 953-1373K, and keeping the temperature for 15-30 hours; taking out the alloy ingot after cooling, putting the alloy ingot into a second container, vacuumizing and sealing; and heating the second container to 973-1373K, carrying out heat preservation for 5-30h, cooling the second container to 923-1173K at a first cooling rate, cooling the second container to 873-923K at a second cooling rate, and cooling the second container to room temperature at a third cooling rate. The blocky cubic tin selenide single crystal material is prepared, the extremely high grain orientation degree is achieved, and the high-performance thermoelectric material can be obtained.

The utility model provides a device for improving the cooling uniformity of a high-carbon steel wire rod, the device for improving the cooling uniformity of the high-carbon steel wire rod comprises an air cooling roller way, a plurality of Jinling devices, a plurality of fans and a plurality of temperature measuring assemblies, the air cooling roller way is used for conveying the wire rod; the multiple Jialing devices are arranged on the lower side of the air cooling roller way at intervals. The plurality of fans are in one-to-one correspondence with the Jiangling devices and are used for supplying air to the Jiangling devices; the multiple temperature measuring assemblies are arranged at intervals in the conveying direction of the air cooling roller way. Wherein the temperature measuring assembly comprises a support, a thermal imager and a point temperature instrument, and the thermal imager is connected with the support; the point temperature instrument and the thermal imager are arranged at an interval in the vertical direction, and the point temperature instrument is connected with the support. According to the device for improving the cooling uniformity of the high-carbon steel wire rod, provided by the utility model, the cooling rate of the wire rod in a phase-change temperature range is accurately controlled, and the temperature difference of the same circle in a phase-change area is reduced.

The invention relates to a preparation method of bainite steel with high toughness and strength at low temperature, and the strength and toughness of the bainite steel at low temperature are improved by designing process parameters and steel ingot components. The bainite steel with high toughness and strength at low temperature is finally obtained by designing the components of the steel ingot, avoiding the addition of elements such as nickel, molybdenum and vanadium, reducing the material cost and the processing difficulty and accurately controlling the cooling rate of heat treatment. The prepared bainite steel is composed of strip-shaped bainite and thin strip-shaped retained austenite, and the volume fraction of the retained austenite is 5-10%. The tensile strength is not lower than 1240 MPa, the normal-temperature impact is not lower than 120 J, and the impact toughness at-40 DEG C is not lower than 80 J.

The utility model relates to the technical field of metal material processing, and discloses an aluminum-magnesium series alloy ingot smelting cooling device, which comprises a cooling tank, a heat exchanger, a heat exchanger and a heat exchanger, the smelting tank is arranged at the top of the cooling pool; the first cooling structure comprises a fixed water jacket, and the fixed water jacket is fixedly mounted on the outer wall of the smelting tank; the second cooling structure comprises six groups of stirring blades, and the stirring blades are arranged in the cooling tank; the water pump is fixedly mounted at the top of the cooling pond; the control panel is fixedly installed at the top of the cooling pond, the first cooling structure further comprises a first water conveying pipe and a second water conveying pipe which are fixedly installed at the two ends of the fixed water jacket correspondingly, the purpose of conducting rapid heat dissipation on the device is achieved, the cooling effect of cooling water is improved, the cooling rate of the smelting furnace is increased, and the using convenience of the device is improved; the device can conveniently collect high-temperature alloy liquid, and resource waste is reduced.

The invention relates to a thermal simulation testing machine sample clamp, a cooling device and an annealing test method, and belongs to the technical field of metal material plate strip annealing tests in the metallurgical industry. According to the technical scheme, the method comprises the following steps: firstly, clamping a sample on a sample clamp, and then putting the sample clamp into a cavity of a thermal simulation testing machine; vacuumizing the cavity of the thermal simulation testing machine, and forming a protective atmosphere in the cavity; heating the sample to 950-1050 DEG C at the speed of 10-50 DEG C / s, keeping the temperature for 3-5 minutes, then quickly cooling the sample to room temperature by blowing, and recording a temperature curve; and stretching the sample subjected to annealing simulation at room temperature, analyzing test data, and observing a metallographic structure through an optical phase microscope. The device has the beneficial effects that on one hand, the problems of short soaking area and low cooling speed in the existing plate and strip annealing test are solved, the processing requirements of a standard tensile sample are met, on the other hand, tedious Jaw module mounting and dismounting operations are avoided, and the test period is shortened.

The variable-frequency constant-pressure cooling device comprises a stainless steel water tank, a water tank liquid level sensor is inserted in the stainless steel water tank, and a water supplementing electromagnetic valve is arranged on a water inlet pipe of the stainless steel water tank. A high-pressure water pump, a variable-frequency water pump system, a check valve, a die-casting die cooling water inlet flow sensor, a die-casting die cooling water inlet pressure sensor and a die-casting die cooling water inlet temperature sensor are sequentially arranged on a water outlet pipe of the stainless steel water tank, the water outlet pipe is finally communicated with the die, and cooling water enters the die to cool the fixed die and the movable die at the same time. A die-casting die cooling water outlet temperature sensor and a die-casting die cooling water outlet flow sensor are arranged on the water outlet pipe connected with the die, and finally cooling water flows to the cooling water tower. The cooling speed of the die-casting die is increased, stable quality of alloy products is guaranteed, the service life of the die-casting die is guaranteed, and safe production is guaranteed.

The invention belongs to the technical field of functional materials, and particularly relates to ultra-thick tabular tungsten oxide and a preparation method thereof.The preparation method of the ultra-thick tabular tungsten oxide comprises the following steps that S1, ammonium tungstate is added into deionized water and stirred to be dissolved at the temperature of 70-90 DEG C, and a clarified ammonium tungstate solution is obtained; s2, cooling the clarified ammonium tungstate solution to normal temperature at a cooling rate of 0.5-2 DEG C / h, and then carrying out suction filtration to obtain plate-shaped ammonium tungstate crystals; s3, calcining the tabular ammonium tungstate crystal to obtain ultra-thick tabular tungsten oxide; ammonium tungstate is adopted as a raw material, controllability is high, tungsten oxide which is uniform in particle size and complete in plate shape is obtained through optimized crystallization and calcination, the purity is larger than or equal to 99%, the problems that traditional tungsten oxide is agglomerated and disordered in shape are solved, functional adaptability is high, the plate-shaped structure can be directionally oriented, the dielectric performance, the breakdown performance and other performance are improved, and the method is suitable for multiple high-end scenes; parameters are easy to control, and operation is simple, green and safe.

The invention discloses cutter handle resistance welding equipment and a welding process, and relates to the technical field of PCB cutter machining. The device comprises a welding table, machining bases, vibration discs, a heating box and a grinding mechanism, the two machining bases arranged in a mirror image mode are fixed to the table top of the welding table, the vibration discs are fixed to the positions, located on the inner sides of the machining bases, of the table top of the welding table, and the heating box is fixed into a first groove, a second groove and a third groove which communicate with one another; and a group of uniformly distributed No.2 heating pipes are fixed in an inner cavity of each side box plate of the heating box. The preheating box is additionally arranged at the feeding part, the cooling speed after welding can be reduced, cracks are prevented from being generated, welding stress is reduced, welding defects are reduced, the workpiece quality is improved, excessive time and procedures are not consumed, the production efficiency is improved, in addition, after-heat treatment can be conducted on the welded workpiece, hydrogen escape is facilitated, delayed cracks are prevented, and the welding quality is improved. And the welding quality is further improved.

The invention discloses welding deformation preventing equipment and method for steel-concrete composite bridge manufacturing, and relates to the technical field of steel-concrete composite bridge welding manufacturing, the welding deformation preventing equipment comprises a working frame, supporting columns, short transverse plates and long transverse plates, heat preservation assemblies are symmetrically arranged at the top of the working frame, and the heat preservation assemblies continuously preserve heat for a cross beam when the cross beam is welded with a plurality of longitudinal beams; and the heat preservation assembly comprises a heat preservation box, a heating pipe and a vertical rod, and a material receiving plate is fixedly arranged on the right side face of the working frame. The two heat preservation assemblies are symmetrically arranged on the top of the workbench. According to the heat preservation assembly, the temperature uniformity of a welding area and an adjacent area is maintained, the welding cooling rate difference is reduced, the tensile stress generated due to local rapid shrinkage and the pressure stress caused by subsequent welding extrusion are reduced, and the thermal stress gradient can be remarkably reduced through constant-temperature control; and accumulated deformation caused by repeated expansion and shrinkage inconsistency of the cross beam in the welding process is restrained.

The invention discloses a manufacturing process of a 1J22 alloy bar with high mechanical performance and high magnetic performance, and belongs to the technical field of precision alloy material processing, the process comprises a rapid cooling treatment step, in the cooling stage after forging or hot rolling forming of the bar, the bar is cooled to be below 650 DEG C from the high temperature not lower than 900 DEG C at the cooling speed of at least 320 DEG C / h, and then the bar is cooled to be below 650 DEG C at the cooling speed of at least 320 DEG C / h; as a 1J22 bar has ordered-disordered transformation at 730 DEG C, in order to prevent brittleness after ordering at 730 DEG C, the bar needs to be quickly cooled within a specific temperature range to improve the brittleness of the material. Compared with the prior art, the 1J22 alloy bar produced on the basis of the technology can guarantee that the magnetic performance is superior to the national standard GB / T14986.3-2018, meanwhile, the mechanical performance is improved, the brittleness is improved, and the phenomena of tooth collapse, corner falling and cracking occurring in the machining process are reduced.