87 results about "Gas quenching" patented technology

The invention discloses a thermal shock failure prediction and laser repair device for a thermal barrier coating and an application method. The device comprises a multi-physics field coupling simulation analysis module, a thermal shock experiment loading module, an online damage monitoring and failure diagnosis module, a robot laser repair execution module and a central control and data processing core unit. A thermal-mechanical-chemical coupling model is established to predict a coating failure behavior, a high-frequency induction heating and gas quenching system is adopted to simulate an extreme thermal shock environment, a multi-band thermal infrared imager, an ultrasonic probe and a digital image related system are integrated to monitor damage evolution in real time, and in-situ repair of a damaged area is realized based on a six-degree-of-freedom industrial robot. According to the method, the whole-process closed-loop control from failure prediction to repair regeneration is realized, the problems of single function and lack of multi-field coupling analysis and real-time repair capability in the prior art are solved, and the service reliability evaluation precision and the remanufacturing efficiency of the thermal barrier coating are remarkably improved.

The invention discloses a niobium-zirconium alloy and nickel-based alloy vacuum brazing process and a part, and belongs to the technical field of vacuum brazing. According to the process, a vacuum brazing furnace is adopted for brazing, and BNi-2 brazing filler metal is used; the process comprises the following steps that S1, a welding assembly structure formed by a niobium-zirconium alloy part and a nickel-based alloy part is assembled, and BNi-2 brazing filler metal is arranged at the matching position of the welding assembly structure; s2, staged heating is carried out on the welding assembly structure under the preset vacuum degree of the vacuum brazing furnace, and the staged heating comprises a foreign matter removing heating stage, a brazing filler metal solid diffusion heating stage and a brazing filler metal melting wetting heating stage which are sequentially carried out; and S3, staged cooling is conducted on the welded assembly structure after welding is completed, the staged cooling comprises a furnace cooling stage and a gas quenching cooling stage which are conducted in sequence, according to the scheme, defect control over the niobium-zirconium alloy and nickel-based alloy welding joint can be effectively achieved, and the strength and sealing performance of the welding joint are guaranteed.

The invention discloses a heat treatment process of a gear, which relates to the technical field of automobile gear heat treatment, and comprises the following steps: S1, blanking, S2, forging, S3, normalizing: preheating the gear in a preheating furnace by adopting a heating mode of combining infrared radiation and hot air circulation, S4, rough machining, S5, carburizing and quenching: carburizing and quenching, s6, induction heat quenching: performing induction heat quenching on an induction coil; S7, nitriding treatment; S8, low-temperature tempering; S9, finish machining; normalizing is combined with infrared radiation, hot air circulation preheating and induction heating, the effects of reducing energy consumption and machining cost and improving production efficiency are achieved, the forging force is reduced through isothermal forging, the energy consumption of equipment is greatly reduced, pulse type vacuum carburizing, high-pressure gas quenching and induction heat quenching are adopted to introduce a self-adaptive induction heating technology, and the energy consumption of equipment is greatly reduced. And a plasma nitriding technology and a composite nitriding technology are adopted, so that the surface hardness, wear resistance and fatigue strength are improved.

Disclosed in the present invention is a clean heat treatment control method for achieving high hardness and minimal deformation of a cold-work die, comprising: double-stage isothermal high-pressure gas quenching: introducing a high-pressure gas quenching gas into a vacuum furnace and stopping introduction of the high-pressure gas quenching gas once the surface temperature of a cold-work die has been cooled to a metastable austenite zone; enabling the temperature of a core portion of the cold-work die to be reduced to 50ºC above the metastable austenite zone by means of gas circulation, and then continuing to introduce the high-pressure gas quenching gas until the surface temperature of the cold-work die is reduced to a martensite point or below; then continuing to heat the cold-work die to a lower bainite zone, maintaining the temperature to enable the core portion to undergo lower bainite transformation, and then cooling the cold-work die to room temperature; and then carrying out high-temperature tempering two or three times. According to the present invention, two-stage vacuum high-pressure gas quenching isothermal treatment, i.e., vacuum high-pressure gas quenching and isothermal quenching in the metastable austenite zone and the lower bainite zone, is performed, and thermal stress and structural stress are controlled by means of the two-stage isothermal treatment so as to control the deformation of the die, thereby achieving accurate control of the structure and stress, controlling the deformation of the die to be within 0.05%.

The invention relates to 20MnCrS5 carburizing steel and a method for manufacturing carburizing steel parts. The 20MnCrS5 carburizing steel comprises 0.17%-0.20% of C, less than or equal to 0.25% of Si, 1.10%-1.40% of Mn, 1.00%-1.30% of Cr, 0.02%-0.05% of Al, 0.02%-0.04% of S, 0.1%-0.4% of Ni, 0.015%-0.03% of Nb, less than or equal to 0.08% of Mo, 0.1%-0.25% of Cu, less than or equal to 0.015% of P, less than or equal to 0.008% of N and the balance Fe and inevitable impurities. The method comprises the following steps: forging a part by using 20MnCrS5 carburizing steel; the forged part is subjected to pre-oxidation; the pre-oxidized part is subjected to vacuum carburizing treatment, and the carburizing temperature ranges from 950 DEG C to 1000 DEG C; and the carburized part is subjected to high-pressure gas quenching. The Nb element is added on the basis of traditional 20MnCrS5 steel, meanwhile, the content of Ni and the content of Cu are increased, the high-temperature carburizing technology and the follow-up cooling technology are improved, and therefore the problem that carburizing steel parts are prone to thermal deformation in the high-temperature carburizing technology is solved.

The invention discloses a treatment system and method for high-temperature waste gas of a gas-based shaft furnace. The treatment system comprises a gas-based shaft furnace reactor, a top gas heat exchanger, a process gas preheater and a process gas quench tower, a high-temperature waste gas outlet of the gas-based shaft furnace reactor is sequentially communicated with a top gas heat exchanger, a process gas preheater and a process gas quench tower; the process gas quench tower comprises a tower body, a vortex gas inlet device is arranged at the inner lower part of the tower body, a structural filling layer is arranged at the inner middle part of the tower body, and a high-pressure water spray cooling device is arranged at the inner upper part of the tower body. According to the process gas quench tower, the vortex gas inlet device and the vortex technology are adopted as an effective pretreatment mode, and by optimizing the gas inlet flowing state of waste gas, the temperature of the waste gas can be effectively reduced and the heat energy loss can be reduced under the condition that the gas flow speed is ensured; and due to the application of the structural filling layer, the heat transfer efficiency between the waste gas and the cooling medium is improved by increasing the heat exchange surface area, and the cooling effect is further improved.

To provide a quenching apparatus and a quenching method with which gas quenching employing hydrogen gas can be efficiently performed.MEANS FOR SOLVING THE PROBLEM: The present invention discloses a quenching apparatus having: a quenching chamber for air blast cooling a material using hydrogen gas; a heat exchanger for cooling the hydrogen gas; a first pipe for supplying the heat exchanger with hydrogen gas discharged from the quenching chamber; and a second pipe for supplying the quenching chamber with hydrogen gas cooled by means of the heat exchanger.SELECTED DRAWING: Figure 1

The utility model discloses a safe sealing device for a high-pressure gas quenching vacuum furnace, relates to the technical field of safe sealing devices for high-pressure gas quenching vacuum furnaces, and solves the problems that if the weight of a sealing cover is too heavy, the sealing cover is difficult to effectively move upwards only by virtue of single matching among a spring, a cross rod, an extrusion block and a bolt, and if only one group of matching structure is arranged, the sealing cover is difficult to move upwards. In order to solve the problems that in the moving process of a sealing cover, the gravity center is unstable, and the like, a supporting frame is included, a lifting mechanism comprises an outer frame and screw rods, lifting blocks are connected to the outer sides of the screw rods in a screwed mode correspondingly, and the outer side surfaces of the sealing cover are fixedly installed at one ends of the lifting blocks correspondingly. The lifting blocks with the outer sides in threaded connection with the lifting blocks can be driven to do lifting motion, when the lifting blocks move upwards, the sealing cover installed at one end is driven to move upwards synchronously, by means of cooperative work of the multiple sets of lifting blocks, the sealing cover can be lifted upwards stably and smoothly, and the lifting process is stable and reliable.

The present application discloses a vacuum high-pressure gas quenching furnace with diverse flow channels and a processing method thereof, relating to the field of heat treatment technology, comprising a gas quenching furnace body, a support frame provided at the bottom of the gas quenching furnace body, a fixed structure provided on the inner wall of the gas quenching furnace body, a gas quenching chamber provided on the fixed structure, a fixed frame for placing workpieces provided on the inner wall of the gas quenching chamber, a heating structure provided on the inner wall of the gas quenching chamber, a cooling structure connected to the inner wall of the gas quenching furnace body provided at one end of the gas quenching chamber body, a convection mechanism connected to the gas quenching furnace body provided on the side of the cooling structure away from the gas quenching chamber body, and a guide mechanism corresponding to the side wall of the gas quenching chamber body provided on the side of the gas quenching chamber body. The workpiece is quenched by heating through the heating structure, and the heat flow in the gas quenching chamber is transported to the cooling structure for cooling through the guide mechanism and the convection mechanism, thereby accelerating the airflow rate, ensuring sufficient contact between the workpiece and the airflow, and improving the heat treatment efficiency of the workpiece.

The utility model relates to the technical field of gas quenching furnaces, in particular to a heating assembly of a single-chamber gas quenching furnace, which comprises a workbench, the upper end of the workbench is fixedly connected with two groups of symmetrical base frames, the upper ends of the two groups of base frames are jointly and rotatably connected with a heating barrel through rollers, and the outer side of the heating barrel is in a symmetrical conical design. A rotating mechanism is mounted at one end of the heating barrel, a furnace door is arranged at the other end of the heating barrel, an exhaust pipe is fixedly connected to the outer side of the heating barrel, a gas quenching furnace body is rotatably connected to the inner side of the heating barrel, and a clamping mechanism is mounted on the inner side of the gas quenching furnace body. The first rotating shaft rotates and drives the brush to scrape and brush the inner wall of the gas quenching furnace body at the same time, manual independent cleaning is not needed, time and labor are saved, through mutual cooperation of the first sliding block and the second sliding block, the first sliding block can drive the grabbing clamp to move, the metal piece is clamped and fixed, and follow-up heating is facilitated.

The present application belongs to the technical field of wind speed test tooling, and particularly relates to a wind speed test tooling for the inside of a gas quenching furnace. The present application comprises a gas quenching furnace main body, the inside of which is provided with a test tooling fixing seat, the inside of which is provided with a fixing rotating part, and the test tooling fixing seat is provided with a telescopic speed measurement assembly which can rotate. The telescopic speed measurement assembly can simultaneously measure the speed of multiple measuring points, and the measured wind speed is transmitted to a positioning control part and then to external receiving equipment. The fixing rotating part controls the angle of the telescopic speed measurement assembly, and the positioning control part controls the length of the telescopic speed measurement assembly. The point position of the measuring point to be tested is determined remotely, the detection range is large, the degree of automation is high, the built-in independent power supply exports the wind speed data in a closed environment, effectively reduces the speed measurement time, reduces the influence of time factors on the speed measurement result, and improves the speed measurement accuracy.

The present disclosure relates to a gas cooling cell, the cell comprising a chamber, one or more openings within the chamber for accessing a processing space within the chamber, one or more doors for closing the openings, and a system (4) within the chamber comprising one or more movable walls (42), wherein the wall is movable between a first position in which it forms a barrier between the opening and the processing space and a second position in which it allows access from the opening to the processing space.

The invention provides a para-aramid fiber processing method based on a microwave-infrared synergistic field effect, and relates to the technical field of high-performance fiber manufacturing. The treatment method comprises the following steps: carrying out heat treatment on undried para-aramid fibers to obtain para-aramid fibers subjected to heat treatment; wherein the heat treatment comprises microwave treatment, infrared treatment and gas quenching shock cooling treatment which are sequentially carried out. According to the processing method of the para-aramid fiber, a'microwave unwrapping-infrared orientation-shock cooling locking 'three-section energy field cooperation mechanism is adopted, gradient energy field time sequence action is performed on the undried fiber, and a'dynamic self-alignment effect' of a molecular chain is triggered, so that the elastic modulus and the orientation degree are remarkably improved.

The utility model relates to the technical field of gas quenching furnaces, in particular to a ventilation assembly of a single-chamber gas quenching furnace, which comprises a workbench, the upper end of the workbench is fixedly connected with two groups of symmetrical first fixing blocks, the upper ends of the two groups of first fixing blocks are jointly and fixedly connected with a furnace body, and the lower end of the furnace body is fixedly connected with a collecting hopper. The lower end of the collecting hopper is fixedly connected with a blow-off pipe, one end of the furnace body is provided with a rotating mechanism, the rotating mechanism comprises a second rotating shaft, the outer side of the second rotating shaft is provided with a swinging mechanism, the front end of the workbench is fixedly connected with a fixing plate, and the upper end of the fixing plate is provided with a lubricating mechanism. And through mutual cooperation of a fourth rotating shaft and a worm, a fixing sleeve drives a mounting shell to rotate, movement of a third rotating shaft is achieved, all-directional ventilation of blades to the interior of the furnace body is facilitated, and the ventilation effect is improved.

The gas quenching system comprises a gas quenching furnace, a plurality of gas inlet holes are formed in the gas quenching furnace wall of the gas quenching furnace, a multi-dimensional partition regulation and control mechanism is arranged on the gas quenching furnace wall of the gas quenching furnace, and a plurality of gas inlet holes are formed in the gas quenching furnace wall of the gas quenching furnace. The multi-dimensional partition regulation and control mechanism can be used for performing partition regulation on the air inflow of the corresponding air inlet holes in the air quenching furnace to realize partition cooling; a plurality of adjustable rotary nozzles are arranged on the furnace wall of the gas quenching furnace and correspond to the gas inlet holes, and the adjustable rotary nozzles can rotate to realize directional cooling; the automatic control system is used for controlling the multi-dimensional partition regulation and control mechanism to carry out partition flow regulation and is used for controlling the adjustable rotary nozzle to dynamically adjust the spraying direction of the nozzle; the multi-dimensional regulation and control zoning mechanism and the adjustable rotary nozzle are integrated, zoning air volume regulation and control and precise air direction regulation and control can be achieved, precise regulation of the air volume is achieved, and the situation that the local temperature is too high is eliminated.

The present invention relates to a method for recovering unreacted iodine using an unreacted iodine recovery device comprising: a gas quenching device comprising a hollow cooling body into which a reaction gas mixture containing iodine (I2) discharged from a trifluoroiodmethane (CF3I) manufacturing process by the reaction of trifluoromethane (CF3H) and iodine (I2) is supplied to one side of the upper portion, and a first injection unit into which cooling water is sprayed from the upper portion of the cooling body; and a filtration device comprising a hollow filtration body having a filter with a plurality of through holes formed in the lower portion of the gas quenching device, and a second injection unit into which cleaning water is sprayed from the upper portion. A cooling step in which a high-temperature reaction gas mixture is supplied to the above-mentioned cooling body and cooling water is sprayed from the first injection part to cool the reaction gas mixture and gaseous iodine (I2) is precipitated, and The above aqueous solution and solid iodine (I2) flow into a filtration device and undergo a filtration step in which the aqueous solution and iodine (I2) are separated by a filter, and The present invention relates to a method for recovering unreacted iodine, characterized in that the iodine (I2) filtered by the above filter is cleaned by spraying cleaning water from a second spraying unit.

The application relates to an alloy skin forming die and method, and belongs to the technical field of metal plastic working, and solves the problems of low profile precision, poor integrity and high cost of an alloy skin in the prior art. The alloy skin forming die comprises an upper die and a lower die, and further comprises a gas quenching die. The alloy skin forming die provided by the application can be used for aluminum alloy local large deformation skin forming, an aluminum alloy local large deformation skin is prepared through a friction stir processing / fluid forming method, the manufactured aluminum alloy local large deformation skin has high precision and good integrity, and the aluminum alloy local deformation capacity can be improved. The alloy skin forming die provided by the application can also be used for aluminum lithium alloy skin forming, an aluminum lithium alloy skin is prepared through a superplasticity / gas quenching forming method, and finally, the aluminum lithium alloy skin not only has high profile precision, but also has high tensile strength performance, the process flow is simple, the processing cost is low, and the aluminum lithium alloy skin has good integrity and consistency.

The present invention relates to a quenching device, and an object of the present invention is to provide a quenching device and a quenching method capable of effectively performing gas quenching using hydrogen gas. Disclosed is a quenching device provided with: a quenching chamber in which a material is blast-cooled using hydrogen gas; a heat exchanger for cooling the hydrogen gas; a first pipe for supplying the hydrogen gas discharged from the quenching chamber to the heat exchanger; and a second pipe for supplying the hydrogen gas cooled by the heat exchanger to the quenching chamber.

This invention provides a high surface hardness gear steel for new energy vehicles, its production method, and heat treatment process. The composition is: C 0.25-0.30%, Si 0.25-0.45%, Mn 1.15-1.35%, P ≤0.015%, S ≤0.015%, Cr 1.11-1.27%, Mo 0.7-1.00%, Al 0.025-0.035%, Ti 0.03-0.05%, Ni 1.4-1.6%, Cu ≤0.2%, [N] 30-50ppm, TO ≤15ppm, [H] ≤1.5ppm, with the remainder being Fe and unavoidable impurity elements. After isothermal normalizing pretreatment + carburizing gas quenching + low-temperature tempering, the carburized layer grain size is ≥10.0 grade, and the surface hardness is ≥800HV. 10 ≥3.0×10 7 L 50 ≥6.5×10 7 This meets the requirements of new energy vehicles for high contact fatigue performance.

A method of implementing a heat treatment process for enhancing strength of a part is provided. The method includes applying, by a controller, a gas quenching process to enable a controlled operation for cooling the part wherein the part comprises a steel material wherein the controlled operation for cooling the part is a subsequent action in the heat treatment process applied after the steel material of the part has been heated to a critical temperature. Also, controlling, by the controller, the cooling of the steel material of the part in the gas quenching process by affecting of changes in a cooling rate over one or more increments of time for the cooling of the part that results in at least an increase in value of an Ultimate Tensile Strength (UTS) of the steel material in correspondence with a decrease in the cooling rate by the controller.

The utility model relates to a boiling chlorination furnace gas quenching pipeline which comprises a connecting flange, a steel body shell, a castable and a neck bush pipe, high-temperature furnace gas is arranged in the quenching pipeline and flows in the neck bush pipe at a high speed, the castable is arranged outside the neck bush pipe, and the neck bush pipe and the steel body shell are connected together through the castable. An anchoring part is welded in the steel body shell, connecting flanges are welded to the two ends of the steel body shell, a lifting lug is welded to the outer surface of the steel body shell, and a reinforcing plate is attached between the lifting lug and the steel body shell. The neck bush pipe is arranged, so that the smoothness of the inner wall of the quenching pipeline is improved, and the phenomenon that high-boiling-point impurities in furnace gas are continuously bonded in the cooling pipeline, and consequently the cooling pipeline is blocked can be avoided or greatly relieved. And meanwhile, the castable with low water content and higher acid resistance is adopted, so that the service life of the quenching pipeline is greatly prolonged, and a powerful guarantee is provided for stable production of the chlorination furnace.

The invention discloses a vacuum high-pressure gas quenching device for high-performance die steel, relates to the technical field of heat treatment, and aims to solve the technical problem of local cooling difference caused by geometric shape difference of die steel. The vacuum high-pressure gas quenching device comprises a furnace body, a gas injection channel, a heating cavity, a vacuum inner furnace, a gas quenching switching mechanism and a shunting guide mechanism, the gas quenching switching mechanism comprises a driving unit, a conversion assembly and a displacement assembly, and the shunting guide mechanism comprises a partition plate, a shunting module and a bipolar magnetic switch. The air quenching switching mechanism drives the flow dividing guide mechanism to axially and precisely move, the flow dividing module is matched to magnetically adjust and control the flow field form, die steel of different structures is adapted, corner supercooling is restrained, groove inner corner cooling is strengthened, the problem of uneven cooling caused by geometrical shape difference is effectively solved, and the cooling efficiency is improved. The method has the remarkable advantages of being good in cooling uniformity, wide in equipment universality, simple and convenient in operation process, low in workpiece deformation and cracking risk and stable in heat treatment quality.

The invention discloses a perovskite thin film based on functionalized aromatic amide micromolecules and a preparation method and application thereof, and the preparation method comprises the steps: introducing the micromolecules into a perovskite precursor solution, replacing a traditional anti-solvent process with a mild and controllable gas quenching method, and achieving the preparation of a wide-band gap perovskite thin film with highly uniform initial distribution of a halogen phase. According to the technology, the separation rate of the bromine element is selectively delayed, the crystallization process is optimized, the crystallization quality of the thin film and the carrier transmission efficiency are remarkably improved, meanwhile, the problem of halogen phase segregation caused by ion migration can be inhibited through the continuous passivation effect of small molecules, and the device has high efficiency and long-term working stability. According to the process, harmful substance pollution and raw material waste are reduced, the homogeneous film forming characteristic can be expanded to the field of preparation of perovskite / organic laminated cells and large-area assemblies, and a new path is provided for development of efficient and stable photoelectric devices.

The present invention discloses a pulverized coal gasifier synthesis gas quenching device and method, belonging to the technical field of pulverized coal gasifier synthesis gas treatment; the device and method comprise a wastewater tank, a water supply quenching pump, an electromagnetic flow control valve, a venturi nozzle and a temperature sensor; the wastewater tank is connected to the venturi nozzle via a wastewater pipeline, and the venturi nozzle is connected to a quenching pipe on the top of the pulverized coal gasifier; a water supply quenching pump is provided on the wastewater pipeline; the quenching pipe is connected to a temperature sensor; the temperature sensor is connected to a controller, and the controller is connected to the electromagnetic flow control valve; the present invention utilizes wastewater spray to cool the synthesis gas in the quenching pipe, which has an energy-saving effect on the one hand, and on the other hand increases the H / C value of the synthesis gas, thereby extending the service life of the catalyst.

This invention relates to the field of metal heat treatment technology and discloses a two-stage high-pressure mixed gas quenching method for high-strength steel. The method first coats the workpiece surface with an inorganic-organic hybrid sol, which is then dried to form a pre-protective film that is in-situ ceramized at high temperatures. After austenitization by heating, a two-stage gas quenching is performed. In the second stage of cooling, the ratio of the supply gas pressure to the chamber pressure is strictly controlled to be above the critical flow threshold, creating a sonic congestion flow at the nozzle. This utilizes gas dynamics principles to physically isolate the downstream pressure fluctuations from interfering with the upstream supply gas flow. Simultaneously, a low-frequency back pressure pulse wave is applied in the quenching chamber to forcibly disturb the gas boundary layer on the workpiece surface, disrupting the stagnant flow zone on the leeward side. This invention utilizes the hydrodynamic congestion effect and unsteady flow characteristics to effectively eliminate heat transfer blind zones in complex surfaces. Combined with the coating to block surface decarburization, it achieves uniform cooling and low distortion control of high-strength steel.

The utility model belongs to the technical field of air cooling systems of vacuum heat treatment equipment, and particularly relates to a rapid air cooling system of large vacuum high-pressure gas quenching equipment. The rapid air cooling device comprises a plurality of sets of rapid air cooling systems which are respectively connected with a plurality of sections of furnace bodies of the gas quenching equipment, each rapid air cooling system comprises an air cooling heat exchange assembly, an air inlet of each air cooling heat exchange assembly is connected with an air inlet pipe assembly, an air outlet of each air cooling heat exchange assembly is connected with an air outlet pipe assembly, and the air inlet pipe assemblies and the air outlet pipe assemblies are connected with the furnace bodies; the air cooling heat exchange assembly comprises an air cooling shell, a heat exchanger set is arranged in the air cooling shell, an air cooling motor is arranged in the air cooling shell, the air cooling motor is connected with an impeller, a fan shell is arranged on the outer side of the impeller, the fan shell is connected with the heat exchanger set through an air guide barrel, and the fan shell is connected with the air outlet pipe assembly through an air collecting barrel via an air outlet. Aiming at an ultra-long heating furnace body of large-scale gas quenching equipment, a multi-set external circulation airflow multiple cooling technology is adopted, so that the effect of quickly and uniformly cooling a workpiece is realized.

The present invention belongs to the technical field of heat treatment equipment, and specifically is a gas quenching furnace with a small air door structure, comprising a heating furnace body, the heating furnace body comprising an insulating jacket, a heating chamber disposed within the insulating jacket, a secondary radiator disposed on the left side of the heating chamber, a main radiator disposed on the left side of the inner wall of the insulating jacket, a closed casing disposed on the right side of the inner wall of the insulating jacket, and a drainage component disposed on the left side of the inner surface of the insulating jacket. The device provides a preset path for the circulation of gas through a cylinder consisting of an internal insulating jacket and an insulating inner cylinder, so that the gas does not need to rely on an air duct for guidance during the circulation process, and can be accurately passed into the interior of the insulating inner cylinder to perform gas quenching on the heated workpiece. The gas circulation system does not have an air duct in the original structure, making the structure simpler, thereby improving space utilization and reducing the overall weight of the device.

The application relates to the technical field of unmanned aerial vehicle landing gear heat treatment, in particular to a heat treatment device suitable for unmanned aerial vehicle landing gear processing, which comprises supporting legs, a box body, a control panel, a top cover, a handle, supporting blocks, a heating assembly and a gas quenching assembly. The box body is fixedly installed on the supporting legs, the control panel is fixedly installed on the front outer wall of the box body, the top cover is hingedly connected to the top of the box body, the handle is fixedly installed above the top cover, the supporting blocks are fixedly installed on the two sides of the top of the box body, the heating assembly is fixedly installed in the box body, and the gas quenching assembly is fixedly installed in the box body. The application solves the problem that the heating speed and the cooling speed of the thin wall and the thick wall of the unmanned aerial vehicle landing gear are inconsistent when the unmanned aerial vehicle landing gear is heated and cooled, the whole part organization transformation is out of synchronization, the part is warped, deformed, even cracked, the heated landing gear needs to be taken out and transferred to a quenching workbench, the whole process is relatively complicated, and the time consumption is relatively long.

The application provides a fine particle high-purity preparation method of a multi-element pre-alloy powder for a diamond tool, the pre-alloy powder takes iron, copper, tin, nickel and cobalt as main raw materials, and the preparation method comprises the following steps in sequence: raw material pretreatment, double-field coupling smelting, atomization-gas quenching, multi-stage grading, reduction annealing, composite purification and passivation post-processing steps; raw material deep purification is realized through vacuum degassing and plasma cleaning, composition uniformity is ensured by adopting electromagnetic induction and vacuum arc field collaborative smelting, powder particle size and morphology are controlled by combining ultrasonic atomization and low-temperature gas quenching, and finally, deep deoxidization and impurity removal are realized through vacuum distillation and plasma purification, the pre-alloy powder prepared by the application has low oxygen content, concentrated and uniform particle size distribution, the final sintered body has a bending strength of 820 MPa and a diamond shear strength of 90 MPa, and is significantly better than traditional products.

The invention discloses a solar cell and a preparation method thereof. The preparation method comprises the following steps: providing a substrate, wherein a plurality of bulges are arranged on the surface of the substrate; printing perovskite precursor ink on the substrate by adopting an ink-jet printing process to form a perovskite wet film covering the bulges; treating the perovskite wet film by adopting a multi-time gas quenching process to obtain a perovskite pre-crystallized film; carrying out annealing treatment on the perovskite pre-crystallized film to obtain a perovskite film layer; according to the sequence of the gas quenching processes, the gas flow of the previous gas quenching process is larger than that of the next gas quenching process, and the air pressure of the previous gas quenching process is smaller than that of the next gas quenching process. The efficiency of the solar cell is improved.