109 results about "Slow heating" patented technology

The invention relates to the technical field of ring main units, and provides a self-adaptive protection device for a ring main unit, which comprises a cabinet body, a gas tank mounted on the back of the cabinet body and filled with environment-friendly insulating gas, and a pressure relief pipe with one end communicated with the top of the gas tank and used for pressure relief of the gas tank, the top of the gas tank is provided with a pressure relief regulation and control assembly, and the top of the pressure relief regulation and control assembly is provided with a dustproof assembly. The pressure relief regulation and control assembly comprises a funnel-shaped main speed discharging barrel arranged at the top of the air box and a butt joint sleeve for connecting the main speed discharging barrel with the pressure relief pipe in a sealed mode. During use, the main pressure relief channel and the branch slow-heating pressure relief channels are utilized and respond to instantaneous high-pressure impact and continuous hot pressing respectively, so that deformation and damage of the gas tank caused by instantaneous arcing overpressure are effectively prevented, and the potential safety hazard that pressure accumulation caused by abnormal slow temperature rise cannot be released in time is eliminated; and self-adaptive protection of the ring main unit gas tank is realized.

The invention discloses a preheating treatment carbon dioxide adsorption system and an operation method thereof, and belongs to the technical field of energy storage and chemical process equipment. The problems of high heat consumption, low heat conductivity and slow heating of the adsorbent in the prior art are solved. The technical key points are as follows: the temperature of the system is slowly increased at the initial stage of heating, part of carbon dioxide is desorbed, the carbon dioxide is heated by high-temperature heat exchange equipment and then flows back to the tower body of the adsorption tower, and the heating process can be completed in idle time except energy storage-energy release due to the fact that the compressed gas energy storage system implements discontinuous energy storage-energy release. Good adsorption and desorption effects can be realized in a relatively low temperature range, so that the energy demand in the heating and cooling process is reduced, the overall energy consumption of the system is reduced, the heat exchange pressure of the heating system is relieved, and the demand on the heat exchange power of heating equipment is relieved; the gas pressure in the adsorption tower body is slightly increased, so that continuous and stable release and supply of carbon dioxide of an adsorption system are guaranteed, and the method has a good industrial application prospect.

A kind of titanium alloy plate local heat / electricity / ultrasonic multi-field coupling assisted progressive forming device and its use method, relate to a kind of titanium alloy plate progressive forming device and its use method.The present application is to solve the technical problems of the existing titanium alloy plate progressive forming method relatively slow heating speed, high energy consumption, poor product quality.The device of the present application realizes two-stage heating by local non-contact heating and pulse current self-resistance heating, improves the heating rate, improves the material plasticity by the "electroplasticity" effect generated by pulse current, reduces the material deformation resistance by the "ultrasonic softening" effect generated by ultrasonic field, improves the formability, and improves the forming quality by multi-field coupling.The present application realizes the reduction of material deformation resistance and plasticity by the coupling of heat, electricity and ultrasonic multi-energy field in the deformation process of sheet metal, and significantly improves the formability of material.

The invention discloses a sintering process for an aluminum alloy plate of a flat thick film heater. An insulating glass medium is sintered to the surface of the aluminum alloy layer by layer through multiple times of printing and sintering, so that the final thickness of an insulating layer is larger than 200 microns, then the insulating standard indexes such as the withstand voltage of 4200 VDC and the like are achieved, the harsh requirement for ultrahigh high-voltage insulating safety is met, meanwhile, by means of a temperature control sintering furnace, an accurate temperature control curve is achieved, the temperature is slowly increased to 200-300 DEG C at the speed of 3-5 DEG C / min, and heat preservation is conducted; organic carriers can be fully and gently removed, and bubbles, pinholes or cracks caused by sudden volatilization are avoided.

A heat treatment method for GH2150 alloy precision thin-walled seamless tubes, belonging to the field of heat treatment of high-temperature alloy precision tubes. The specific process flow is: pre-treatment of tubes - hoisting tubes - multi-stage slow heating and heat preservation - rapid heating of tubes for recrystallization - rapid cooling - furnace cooling to room temperature below 200°C and then discharging from the furnace; the multi-stage slow heating and heat preservation is: heating the tubes to 300°C ± 5°C, 500°C ± 5°C, 700°C ± 5°C, 900°C ± 5°C at a speed of 5°C / min to 10°C / min respectively and keeping each temperature for 30 minutes; the rapid heating of tubes for recrystallization is: raising the vacuum degree to above 3×10⁻³ Pa, and then heating to 1020°C to 1100°C at a speed of 10 ± 2°C / min and keeping the temperature for 10 minutes to 30 minutes. The heat treatment method of the present invention can significantly refine the alloy grain structure, improve the uniformity of the tube structure, and further improve the service life of tube parts.

This invention discloses a method for manufacturing 3D display glass and its curved display glass, relating to the field of glass manufacturing technology. A conveying preheating box is attached to one side of the top of a multi-stage temperature control frame. Several pressure-equalizing hydraulic cylinders are equidistantly installed on the top of the conveying preheating box. Pressure-limiting fixing frames are attached to the bottom of the pressure-limiting fixing frames. Inlet and outlet electric slide rails are symmetrically installed at the bottom of the pressure-limiting fixing frames. Inlet and outlet sliding frames are installed at the bottom of the inlet and outlet electric slide rails via slide rail seats. A positioning electric slide rail is embedded at one end of the inlet and outlet sliding frame. A shaping top mold is fitted between two clamping fixing frames. This invention utilizes a combination of pneumatic hot bending, gravity hot bending, shaping hot pressing, and edge correction hot pressing. Furthermore, by using slow heating and slow cooling, along with mold control, the shape of the curved glass can be effectively controlled. Simultaneous operation of pretreatment and forming processes reduces the waiting time required during production.

The glasses with the positioning function comprise a glasses frame, a nose bridge bracket and lenses, the two lenses are movably embedded in the inner side of the glasses frame, a glass preheating anti-fogging structure is arranged on the inner side of the glasses frame, and charging port waterproof structures are arranged on the outer sides of glasses legs in two glasses leg assemblies. A bracket replaceable structure is arranged at the other end of each glasses leg in the two glasses leg components; the glass preheating anti-fogging structure comprises a storage battery and an electric heating wire, the electric heating wire is fixedly mounted in the glasses frame, and the storage battery is electrically connected with the electric heating wire. The storage battery supplies power to the electric heating wire, and the electric heating wire can be heated to a preset temperature or above within a short time after being electrified, so that the lens in contact with the electric heating wire can be slowly heated to facilitate demisting in winter, and the heating and demisting effects of the glass lens can be realized within a short time when a user enters a warm room from a low-temperature environment; therefore, the use effect of the glasses with the positioning function is improved.

The invention discloses quartz crucible melting equipment, and relates to the technical field of crucible melting. The device comprises a lifting hanging bracket, a mounting plate, a positive pole mounting assembly and a negative pole displacement assembly, the positive pole mounting assembly is mounted below the mounting plate through a connecting rod group, the positive pole mounting assembly comprises a positive pole ceramic sleeve, and three groups of positive pole graphite electrode bars are arranged on the positive pole ceramic sleeve; the mounting plate is provided with three circles of uniformly arranged cathode displacement assemblies, and the bottom end of the cathode graphite electrode bar surrounds the bottom end of the anode graphite electrode bar to form a conical discharge tower. By arranging the three structural layer positive graphite electrode bars and the three circles of negative graphite electrode bars, three groups of conical discharge towers are formed, a larger heating area can be formed, and the problems that existing heating is conducted at one point position, the heating speed is low, and heating is unbalanced are solved.

The invention provides a low-temperature manufacturing method of a jet element. The method comprises the steps that S1, a cover plate, a bottom plate and a base plate of the jet element are machined, the surfaces are pretreated, and soldering lugs are polished; s2, cleaning the to-be-connected surfaces of the cover plate, the bottom plate and the substrate and the soldering lugs; s3, coating a soldering flux on a welding part; s4, heating, heat preservation and cooling; s5, glue is injected into the bonding part; s6, pressurizing and standing; and S7, heating, heat preservation and cooling are conducted, specifically, the bonded whole is put into a muffle furnace to be slowly heated and subjected to heat preservation, and the whole is taken out after being naturally cooled to the room temperature in the furnace. Thermal damage can be avoided, the welding stress can be reduced, meanwhile, the cost is reduced, and the service life of the manufactured jet element is greatly prolonged due to the fact that the base material is free of damage, the internal residual stress is small and the shock resistance of the connector is good.

The present application belongs to the field of special steel production and processing in the metallurgical industry, and provides a rolling production method for improving internal defects of medium-carbon nickel / sulfur-containing steel. The method uses preheating and slow heating for production, improves the internal quality of nickel / sulfur-containing steel (internal cracks, shrinkage holes and other defects) under the premise of not changing the organizational performance of the steel, greatly increases the yield of medium-carbon nickel / sulfur-containing steel, improves the core quality and saves the production cost.

The utility model discloses a kind of warm air water tank heating pipeline, belong to automobile technical field.It solves the problem of slow heating speed of new energy vehicle in prior art.It mainly includes PTC water tank heating circuit and battery cooling circuit;PTC heater, first water pump, second three-way valve, third three-way valve, warm air water tank and first temperature sensor are arranged in the PTC water tank heating circuit, heat exchanger, battery cooling water tank, second water pump, battery, first three-way valve and second temperature sensor are arranged in the battery cooling circuit, battery cooling circuit is connected first three-way valve by eighth branch pipe at battery one end, first three-way valve is connected battery cooling water tank and warm air water tank by first branch pipe and second branch pipe respectively, the warm air water tank and battery cooling water tank are connected second three-way valve by third branch pipe and fourth branch pipe respectively, the third three-way valve is connected warm air water tank and battery cooling water tank by fifth branch pipe and sixth branch pipe respectively.

A preparation method of bainite steel with a large-size section, high strength, high toughness and uniform performance relates to the field of engineering material production, and comprises the following steps: forging a steel ingot, placing the refined steel ingot in a box-type furnace, carrying out first-stage rapid heating, carrying out second-stage slow heating, and carrying out austenitizing heat preservation; thirdly, medium cooling is conducted for three times, medium stagnation is conducted, and steel ingot heat conduction is conducted; according to the method, the surface of the large-size sample is cooled through water cooling, oil cooling or mist spraying, heat of the center of the large-size sample is conducted outwards, the surface temperature is increased, cooling is conducted through a medium, heat returning is conducted, and the steps are repeated. And cooling and heating for multiple times until the temperature of the core and the surface is uniform, and placing in air or burying sand for cooling. The obtained large-size component has high strength and plasticity, meanwhile, the content of retained austenite in the structure ranges from 10% to 15%, and the balance is bainite ferrite.

A fused salt heat storage system with a preheating function relates to the technical field of fused salt energy storage and comprises a deaerator, a fused salt tank and a heat exchanger. A coil pipe is arranged in a shell of the molten salt tank, the liquid inlet end of the coil pipe is communicated with the liquid outlet end of the deaerator, and the liquid outlet end of the coil pipe is communicated with a cold side inlet of the heat exchanger. Water output from the deaerator passes through the shell of the molten salt tank, hot water is generated under high-temperature heating of the molten salt tank, and the hot water enters the heat exchanger to slowly heat the heat exchanger, so that the heat exchanger is well protected. According to the fused salt heat storage system, no new equipment is added, preheating of the heat exchanger is achieved only through reasonable layout of pipelines, and cost is greatly saved.

According to the megawatt wind power short-process main shaft heat treatment process provided by the invention, the manufacturing process is effectively shortened and the energy consumption is reduced by optimizing material components and forging steps. The main shaft comprises the following components in percentage by weight: 0.35 to 0.55 percent of C, 0.42 to 0.85 percent of Mn, 0.32 to 0.52 percent of V, 1.15 to 1.57 percent of Cr, 0.44 to 0.85 percent of Ti, 0.25 to 0.38 percent of Nb, 0.32 to 0.58 percent of Ni, less than or equal to 0.01 percent of S, less than or equal to 0.01 percent of P and the balance of Fe. A metal raw material with specific components is poured into a steel ingot, and after heat preservation, heating, upsetting and other procedures, the steel ingot is further treated in two parts. Wherein one part is upset into a rod-shaped structure, the other part is processed into a through hole, and then the rod-shaped structure is inserted into the through hole to form a combined body. And the combined body is heated again, upset and subjected to surface rolling finishing, the rolling initial temperature ranges from 800 DEG C to 850 DEG C, the rolling final temperature ranges from 500 DEG C to 550 DEG C, finally, slow heating and returning are conducted, cooling is conducted to the room temperature, and the finished steel ingot is obtained. By means of the segmented heating and combined forging mode, the forging process is optimized, working hours are shortened, and energy waste is reduced.

The invention discloses a composite heating system for CVD (Chemical Vapor Deposition) equipment, a cooperative control method and application of the composite heating system in preparation of a tantalum carbide coating. According to the system, an induction heating unit and a resistance heating unit are effectively divided and organically combined by arranging a heat insulation layer, a resistance element is made of a high-resistivity non-magnetic material, lead arrangement and a shielding structure are optimized, and the problems of electromagnetic coupling and thermal interference between two heating modes are fundamentally solved; according to the control method, through staged cooperative control, dynamic power distribution and a soft switching strategy, unification of rapid temperature rise and temperature uniformity and stability is achieved. Therefore, the method effectively overcomes the problems of slow temperature rise, large temperature difference and poor adaptability in the prior art, and is particularly suitable for preparing high-quality and high-uniformity tantalum carbide coatings required in the fields of aerospace and semiconductors.

The invention discloses an ultra-fast degreased and sintered dental restoration based on a photocuring technology and a preparation method thereof, and relates to the technical field of photocuring dental glass ceramic manufacturing. According to the preparation method of the dental restoration based on the ultra-fast degreasing and sintering of the photocuring technology, the photocrosslinking compound and the thermal crosslinking compound are simultaneously introduced into the slurry system, and the low-molecular-weight solvent and the ceramic powder with high solid content are matched, so that a green body structure capable of keeping integrity under the condition of fast heat treatment is effectively constructed. By combining Joule heating ultra-fast high-temperature sintering equipment, the green body can cross a critical temperature interval in which the green body is easy to crack in an extremely short time, meanwhile, structural relaxation and defect accumulation which are possibly generated in a slow heating process are inhibited, and the microstructure uniformity and reliability of the glass ceramic material in a fast densification and crystallization process are ensured. According to the invention, ultra-fast degreasing and sintering of the dental ceramic material are realized.

This invention relates to a method for preparing a silicon nitride wear-resistant coating on the surface of a graphite part. The method involves coating the graphite part with polynitrosilane, followed by drying and subsequent decoking and high-temperature ceramization treatments. The process is precisely designed as a multi-stage heating decoking and high-temperature ceramization process. By strictly controlling the heating rate and holding time, the method avoids coating shrinkage and cracking caused by rapid heating, as well as resource waste and increased internal stress caused by excessively slow heating. Simultaneously, the decoking temperature is optimized to prevent excessive decomposition and escape of polynitrosilane or residual small molecules. This effectively solves the coating cracking problem caused by the difference in thermal expansion coefficients between graphite and silicon nitride, thereby obtaining a dense, uniform, and crack-free silicon nitride coating.

The utility model discloses a large cushion block mechanism of an ultra-large cubic press, which comprises a cushion block, a plurality of groups of tiny small holes are formed in the cushion block, a plurality of groups of mounting grooves are formed in the outer side of the cushion block, a plurality of groups of through holes are formed in the bottom ends of the mounting grooves, and a plurality of groups of through holes are formed in the bottom ends of the mounting grooves. Clamping mechanisms are arranged in the mounting grooves, each clamping mechanism comprises a clamping rod, a limiting block, a clamping groove, a clamping sleeve, a top groove, a clamping block and a locking sleeve, the clamping rods are arranged in the through holes, the limiting blocks are arranged at the top ends of the clamping rods, the clamping grooves are formed in the outer walls of the clamping rods, the clamping sleeves are arranged in the mounting grooves, and the clamping sleeves are arranged in the clamping grooves. The technical problems that in the background technology, a slow heating and cooling mode is long in consumed time, the labor cost is higher, and the installation process is tedious and time-consuming are solved.

The invention provides a battery pack heating method and device and a vehicle with the battery pack heating device.The method is applied to the technical field of vehicles and comprises the steps that in response to a motor controller, a pulse heating mode is entered, and the resistance value of a battery pack, the inductance value of the battery pack, the capacitance value of an inverter and the battery heating rate are obtained; determining a target pulse frequency according to the resistance value, the inductance value and the inverter capacitance value, and determining a target direct-axis current according to the battery heating rate; based on the target pulse frequency, the target direct-axis current and preset quadrature-axis current, the duty ratio of each bridge arm in the motor controller is determined, and the corresponding bridge arm is controlled according to the duty ratio of each bridge arm, so that resonance current for heating the battery pack is generated between the battery pack and the motor controller. According to the method, the problems of high energy consumption and low heating speed during external heating, extra consumption of battery capacity and reduction of energy efficiency during internal heating and the like in related technologies can be solved, and rapid and uniform heating of the battery is realized.

The invention discloses a forming method for reducing curing deformation of a composite material laminated board through non-isothermal curing. The forming method specifically comprises the following steps: step 1, determining a curing shrinkage generation area of a laminated composite material; step 2, constructing a first stage of a non-isothermal curing period, namely a rapid heating stage; step 3, constructing a second stage of the non-isothermal curing period, namely a slow heating stage; and step 4, constructing a third stage of the non-isothermal curing period, namely a cooling stage. The invention solves the problem that the existing curing molding process is easy to cause the deformation of the laminated composite material laminate.

The invention provides a control method and device of a heat pump system and the heat pump system. The control method comprises the steps that it is determined that the heat pump system is in a heating mode, and the external temperature of the outdoor environment where the heat pump system is located is obtained; different water temperature detection operations are executed on a hot water tank of the heat pump system according to the interval range where the external temperature is located; and according to the detection result of the water temperature detection operation, the heat pump system is controlled to be switched between an energy-saving mode and a normal mode. According to the control method and control device of the heat pump system and the heat pump system, by considering the external environment temperature and the comprehensive condition of hot water in the water tank at the same time, the energy efficiency ratio (COP) of the system is improved while it is guaranteed that the hot water is rapidly heated, and therefore the problem that in the prior art, energy consumption is increased when a heat pump operates at high frequency is solved; and the problem of slow temperature rise of hot water possibly caused by low-frequency operation is solved.

This invention belongs to the field of glove mold technology, specifically referring to a glove mold manufacturing process. The glove mold includes a palm part and an arm part. The palm part includes a front mirror image and a rear mirror image. The forming process of the front mirror image or the rear mirror image includes the following steps: First stretching: stretching a stainless steel plate to form the approximate shape of the product; Annealing: slowly heating the part to 500-1200℃, holding it in a nitrogen atmosphere for 2-8 minutes, and then cooling it to room temperature; Second stretching: further stretching the part; Finger seam shaping: shaping the part's surface and finger seams; Edge trimming: trimming the part along the radius (R-angle); Tempering: heating the part to 500-1200℃, holding it for 2-8 minutes, and then cooling it to room temperature; Flattening: flattening the R-angle of the part; Scraping: removing the remaining waste material other than the front mirror image or the rear mirror image to ensure its flatness. The tempering and annealing processes of this invention can effectively prevent cracking or excessive thinning of the finger seam area.

This utility model discloses a heating device for the production of water-based coatings, comprising a heating chamber; a heating unit disposed within the heating chamber for heating the water-based coating; a pressure relief unit disposed on the heating chamber for releasing internal air pressure; and a cleaning component disposed on the heating unit. This utility model utilizes the heating unit to heat the water-based coating both internally and externally, preventing heat loss and slow heating in certain areas, thereby improving the heating efficiency. The pressure relief unit releases excessively high air pressure generated during heating in real time, preventing the risk of explosive agglomeration due to gas expansion. Furthermore, the cleaning component, in conjunction with a rotating component, effectively cleans the water-based coating adhering to the inner wall of the equipment, enhances the uniformity of stirring and heating, and eliminates internal air bubbles, preventing pinholes and pitting after the paint film has cured.

The application relates to the technical field of ring network cabinets, and provides a self-adaptive protection device for a ring network cabinet, which comprises a cabinet body, a gas tank filled with environment-friendly insulation gas and installed at the back of the cabinet body, and a pressure relief pipe communicated with the top of the gas tank and used for pressure relief of the gas tank; a pressure relief control assembly is installed at the top of the gas tank; the top of the pressure relief control assembly is provided with a dustproof assembly; the pressure relief control assembly comprises a funnel-shaped main speed discharge cylinder arranged at the top of the gas tank and a butt joint sleeve pipe sealingly connected with the main speed discharge cylinder. In use, the main pressure relief channel and the branch slow heat pressure relief channel are utilized, and the main pressure relief channel and the branch slow heat pressure relief channel respectively respond to instantaneous high pressure impact and persistent heat pressure, so that deformation and damage of the gas tank caused by instantaneous arc overvoltage are effectively prevented, hidden dangers caused by pressure accumulation due to abnormal slow heating and unable to be timely discharged are eliminated, and self-adaptive protection of the gas tank of the ring network cabinet is realized.

The present application provides a dynamic heating control method, device, electronic device and storage medium for low-temperature charging of a battery, wherein the dynamic heating control method for low-temperature charging of a battery includes: dynamically adjusting the lower and upper limits of the battery heating threshold based on the current SOC of the battery; and dynamically adjusting the target water temperature based on the current total heat absorption of the battery. The present application can dynamically adjust the target water temperature used for heating so that the temperature rise rate of the battery dynamically corresponds to the current total heat absorption of the battery, thereby avoiding slow heating and longer charging time due to a too small temperature rise rate, and larger temperature difference and shorter service life due to an excessively large temperature rise rate. At the same time, by controlling the battery heating threshold to change in real time with the charging process, it is ensured that the battery can enter or exit heating in time according to the corresponding heating threshold at different charging stages, so that the battery is always maintained within the optimal charging temperature range, while taking into account both reducing charging time and reducing heating energy consumption.

The invention discloses a colloid melting system and a full-automatic glue sprayer, and aims to solve the problems of slow heating and high invalid power of a colloid melting system of an existing glue sprayer. A colloid melting system comprises a colloid melting cylinder, a microwave magnetron and a wave guide plate, the colloid melting cylinder is a metal cavity, the microwave magnetron emits microwaves for heating, and the wave guide plate is of a specific structure to guide the microwaves for uniform heating. And the sealing cover of the glue melting cylinder is high in sealing degree to ensure microwave constraint and temperature maintenance. The full-automatic glue sprayer adopts the glue melting system, and further comprises a glue melting control system, a glue solution conveying system and a servo spray gun system. The vent hole and the glue outlet hole are provided with special structures to prevent microwave leakage, the shunting box can assist in heating and utilize waste heat to preserve heat, and each part is provided with a heat preservation and radiation protection structure. The colloid melting system has the advantages of being high in colloid melting speed, low in invalid power, uniform in heating, high in safety and the like.

This utility model relates to a heat treatment device for processing impact crusher liners. This utility model effectively solves the problems of slow heating, high energy consumption, uneven heating of the liner, and difficulty in controlling and maintaining a stable heating temperature in existing heat treatment equipment. This heat treatment device for impact crusher liner processing allows the liner to rotate both on its own axis and around a central axis, ensuring that all points on the liner surface periodically enter a high-intensity magnetic field zone, achieving three-dimensional uniform heating, fully heating all parts of the liner, and reducing temperature differences. The electromagnetic induction heating mechanism can perform segmented induction heating of the liner, preheating it before rapid austenitization, effectively improving the heating rate. The atomizing quenching mechanism can adjust the appropriate quenching state, uniformly quenching all parts of the liner, ensuring good performance. The liner rotation mechanism can simultaneously fix multiple liners, effectively improving processing efficiency and quality, and facilitating heat treatment of the liners.

The invention relates to the technical field of ceramic surface metallization, and discloses nano nickel powder slurry with high dispersion stability and a preparation method and application thereof.According to the slurry, pure nickel powder is replaced with Ni-Sn alloy powder, tin reacts with sulfur preferentially to generate a SnS protection layer, a sulfur source is consumed to protect a nickel core, an organic tin compound is added into the slurry to serve as an in-situ repairing agent, and the surface of the nano nickel powder is repaired. Active Sn < 2 + > is decomposed and released in the rubber discharging stage and migrated to the surface defect position to be combined with sulfur, repairing of a protection layer is achieved, a weak coordination type dispersing agent is adopted, steric hindrance is provided through hydrogen bonds and Van der Waals force to maintain storage stability, meanwhile, interference of a strong anchoring group on tin migration is avoided, the adding time of organic tin is controlled through a step-by-step feeding process, and the stability of the organic tin is improved. And a compact SnS protection layer is formed in cooperation with slow heating, nickel cores are exposed after complete decomposition at high temperature, the long-term dispersion stability of the slurry in a sulfur-containing system is achieved, and the method is suitable for manufacturing of an MLCC inner electrode.

The application belongs to the technical field of neodymium-iron-boron magnet production, and relates to a preparation method of a neodymium-iron-boron magnet with high mechanical service characteristics. The application discloses a preparation method of a neodymium-iron-boron magnet with high mechanical service characteristics, which comprises the following steps: sequentially performing sintering heat treatment and tempering heat treatment on a neodymium-iron-boron green body; the sintering heat treatment comprises six stages: a vacuum extraction stage, an exhaust stage, a slow heating stage, a sintering stage, a slow cooling stage and a rapid cooling stage; the slow heating stage is "wave-shaped" slow heating, the sintering stage is "wave-shaped" sintering heat preservation, and the slow cooling stage is "wave-shaped" slow cooling. The preparation method of the neodymium-iron-boron magnet with high mechanical service characteristics can improve the mechanical performance of the neodymium-iron-boron magnet while ensuring the magnetic performance of the neodymium-iron-boron magnet.

A dual-heating drum stir-frying machine, comprising a machine frame (3), a pot body apparatus (1), a first heating apparatus (2) and a controller (400), the pot body apparatus (1) comprising a pot core (11), a second heating apparatus (12) and a pot core positioning mechanism (13), the second heating apparatus (12) being disposed below the pot core (11), the first heating apparatus (2) comprising a supporting frame (21) and an auxiliary heating apparatus (22), the auxiliary heating apparatus (22) being located above the pot core (11), and the second heating apparatus (12) and the auxiliary heating apparatus (22) of the dual-heating drum stir-frying machine being disposed below and above the pot core (11), respectively, so that food material in the pot core (11) is rapidly heated from multiple directions, and it is possible to retain the moisture of the food material, thereby preventing the food material from losing too much moisture due to too slow heating speed and affecting the taste. In addition, the supporting frame (21) is configured to be rotatable relative to the pot core positioning mechanism (13), so as to flexibly adjust the auxiliary heating apparatus (22) such that the radiation direction of the auxiliary heating apparatus (22) faces the pot core (11), to improve the heating effect of the auxiliary heating apparatus (22).