The electromagnetic induction heating intermediate frequency melting furnace currently popular in electric furnaces for foundry can heat and melt scrap metal materials such as iron and steel, aluminum, copper, gold, silver, etc., add alloy components, and pass through slag removal and other processes to become qualified metal liquids and cast to form castings. It has the characteristics of quick start, high heating efficiency, electromagnetic stirring, instant use and low energy environmental protection. It is the preferred heating equipment for electric furnaces in the foundry industry.Deformation correction of 20CrMo steel plate by vacuum carburizing and quenching Heating principle of electric furnace for foundry:This electric furnace for handcuffs is a non-vacuum metal heating and smelting equipment, without gas break protection components, adding scrap metal into the casting furnace, at this time, the intermediate frequency power supply and the smelting furnace money ring are combined to generate a magnetic field in the coil, so as to create a magnetic field inside the technology. The eddy current generates self-heating, and the electric casting furnace will complete the process of heating and heat preservation according to the given temperature curve, and then transport all the metal liquid out of the furnace, and pour it into the mold to become a casting after cooling.Introduction to Vacuum Annealing The composition of the electric furnace for casting: the melting system of the electric furnace for casting generally consists of a transformer, a low-voltage cabinet, an intermediate frequency power supply, a steel shell furnace body, a hydraulic tilting furnace system, a leakage furnace protection system, a cooling circulation system, a magnetic yoke, a capacitor bank, a water-cooled cable and feeding materials. car etc.Insufficient Hardness Of Carburizing And Quenching Of 20CrMo Steel Hydraulic Cylinder

Tempering furnace control system The control system consists of upper and lower computers. The upper computer is an industrial computer. The operation screen is more friendly and humanized. At the same time, it also has the characteristics of reliable operation and strong anti-interference ability. The lower computer is a PLC system, which has shock resistance and impact resistance. The upper computer is installed on the operating table, and the display screen can provide users with a good human-machine interface.Common Failure and Maintenance of Vacuum Quenching Furnace It mainly consists of the following subsystems: Transmission control system The transmission control system is a continuous production process of film loading-heating-cooling-removing film. Its transmission program and process parameters are different due to different glass thicknesses, all of which are automatically controlled by PLC. The transmission process status can be displayed through the terminal display. monitor.Heat treatment process of gear vacuum carburizing and quenching temperature control system The temperature control uses a temperature control module. Each heating zone is equipped with a thermocouple. According to the thickness and variety of the glass, the temperature is set on the operation terminal. The temperature control module calculates and outputs a control signal to the solid state according to the measured temperature. The relay is used to control the output power of the heater. It adopts a set of advanced automatic optimization temperature algorithm, which can realize the PID self-tuning function and fuzzy control function, and the temperature control is very accurate. The solid state relay has stable performance and reliable operation, so the temperature control system is very reliable.Deformation correction of 20CrMo steel plate by vacuum carburizing and quenching

Plate heat exchanger is an important device for large air conditioning system exhaust energy recovery, high temperature flue gas waste heat recovery and computer CPU heat dissipation. The structure has a vacuum liquid filling head and a core body. The vacuum liquid filling head is arranged on both sides of the vacuum liquid filling channel, and one side of the vacuum liquid filling head is provided with a connecting pipe. The core body consists of the vacuum liquid filling channel and several plate fin channels. It is formed by overlapping at intervals.Carbide and Steel Vacuum Brazing The vacuum filling channel is provided with partitions up and down, seals are provided on both sides, and fins can be arranged in the channel. The plate-fin channel is provided with partitions up and down, seals are arranged on both sides, and fins are arranged in the channel. Each plate-fin channel is divided into two parallel hot medium channels and cold medium channels by a strip.What you need to know about thermocouple of vacuum furnace After assembly, the whole is horizontally inclined or vertically arranged. It is composed of stamped and formed concave and convex stainless steel plates. The concave-convex pattern between the two adjacent plates forms a 180-degree relative combination, so the concave-convex ridge lines between the two plates of the plate heat exchanger form staggered contact points.Advantages of vacuum sintering of tungsten cobalt carbide

Energy-saving technology of industrial kilns In industrial production, the heat generated by the combustion of fuel is used, or the electrical energy is converted into heat energy, so as to buy thermal equipment for various processing processes such as smelting, heating, drying, sintering, cracking and distillation of workpieces or materials. It is called an industrial furnace.High temperature vacuum carburizing gear steel Industrial kiln is mainly composed of furnace lining, furnace frame, heating device (such as combustion device, electric heating element), preheater, furnace pipeline, smoke exhaust system, furnace machinery and other parts.What should we do when problems occur in vacuum heat treatment? At present, industrial furnaces are widely used in all walks of life in the national economy, such as metallurgy, building materials, chemicals, light industry, food and ceramics. It has many varieties, high energy consumption and great influence, and is the key equipment for industrial heating. The development of its heating technology and the adoption of high-efficiency energy-saving technology have a great impact on improving product quality, reducing production costs, rationally utilizing energy, improving labor conditions, and realizing civilized production.Pressureless Sintering of Silicon Carbide Ceramics

Introduction to Mechanical Filters Mechanical filters are generally used in the pretreatment process of water treatment projects, mainly to remove mechanical impurities, colloids, microorganisms, organic matter and active chlorine. Shell materials generally include PE, steel lining, steel spray and steel epoxy anti-corrosion, stainless steel and glass fiber reinforced plastic. According to different process needs, the filter media generally include quartz sand, activated carbon, manganese sand, anthracite and so on. According to the water inlet method, it can be divided into single-flow filter and double-flow filter, which can be used in combination or alone according to the actual situation.High temperature vacuum carburizing gear steel The single-flow mechanical filter has simple piping and smooth operation. The filtration flow rate is generally 4-50m/h, and the operation period is generally 8 hours. The upper and lower ends of the double-flow mechanical filter are provided with water inlet devices, and the middle part is provided with a water outlet device. The advantages are that the amount of filtered water is large, the decontamination ability is high, and the operation period is long, generally 20 hours.What should we do when problems occur in vacuum heat treatment? Mechanical filtration is widely used in the water treatment process, mainly used for water treatment to remove turbidity, reverse osmosis, and the pre-treatment of ion exchange softening and desalination systems, and can also be used for surface water and groundwater to remove sediment. The inlet water turbidity is required to be less than 20 degrees, and the effluent turbidity can reach below 3 degrees. The double-layer filter material is: the upper layer of anthracite is 400mm/1.2～2.5mm; the lower layer of quartz sand is 800mm/0.5～1.2mm.Pressureless Sintering of Silicon Carbide Ceramics

Open tube furnace The inner liner of the tubular electric furnace is made of the lightest high-temperature resistant fiber material in the world. It is composed of two semi-circular furnace bodies. It is easy to open and can be used as a vertical or horizontal type. Or the furnace body can be installed on other work surfaces as required, or it can be integrated with the controller system GWL, and the control system adopts LTDE technology programmable intelligent instrument. Vacuum Brazing of K9 Glass and 2507 Stainless Steel It has up to 30 sections of heating program function, and can correct the slope and PID function. Just open the power setting program, the machine will work automatically, and it will automatically shut down after work. The instrument is easy to operate, has fast heating speed, adjustable heating speed, light appearance, and its weight is one-fifth of that of ordinary high temperature furnaces.Low Pressure Vacuum Carburizing Heat Treatment Process for Transmission Gears Normal operation: Turn on the power and press the ↑ key for two seconds to make STOP appear in the SV window. Setting steps: Press the ← key PV to display C01. Press ←↑↓ to set the desired temperature. Press SET key, PV displays t01. Press ←↑↓ to set -1. Wait until you return to the menu (SV shows STOP). Press the ↓ key again for two seconds, the SV will display RUN. At this point, the PV shows a rise in temperature. The SV window HOLD and the set temperature are displayed alternately.Low temperature carburizing of 9Cr18 stainless steel surface

The chain furnace is a fire-bed furnace with a wide range of applications, with a history of more than 100 years. At present, the capacity of domestic chain furnaces is 240t/h, and our company has achieved 160t/h hot water boilers.Low Pressure Vacuum Carburizing Heat Treatment Process for Transmission Gears The chain furnace is a typical front-fed fuel boiler, and the grate moves slowly from front to back like a belt conveyor. The fuel descends from the coal hopper and falls on the grate, and travels with the grate. Air is introduced from below the grate from bottom to top, intersecting the direction of fuel supply. When the fuel passes through the coal gate, it is scraped to a certain thickness and then enters the furnace. After the fuel is radiantly heated in the furnace, it enters the combustion stage. 1. Chain belt grate: The shape of the grate pieces is like a link, and the whole grate itself is a wide annular chain belt formed by these "links" in series, and the chain belt is surrounded by the sprocket and supported on the front and rear axles.Low temperature carburizing of 9Cr18 stainless steel surface 2. Beam type grate: The rigid beam is used as the support and series structure of the grate piece. The beam grate is very convenient to replace the grate pieces during operation, and the grate surface is relatively flat, which is extremely durable. The width and length of this grate can be made very large.Vacuum Heat Treatment Process of Cr12MoV Steel Die

Introduction to the structure and performance of blast furnace hot blast stove As the name implies, a hot blast stove is a thermal equipment that integrates combustion and heat transfer processes to provide hot air flow for the process. Generally, there are two major types, namely, the intermittent working regenerative hot blast stove and the continuous heat exchange hot blast stove. At present, when the high temperature ceramic heat exchange device is still immature, the intermittent working regenerative hot blast stove is still the mainstream product of the hot blast stove.Vacuum Heat Treatment Process of Machine Tool Spindle In order to continuously provide hot air, the regenerative hot blast stove must have at least two hot blast stoves working alternately. Hot blast stoves are widely used in many fields of industrial production. Due to different process requirements, different fuel types, and different hot blast media, hot blast stoves with different uses and structures are derived. The hot blast stoves to be introduced here are the hot blast stoves that provide high temperature hot air for blast furnace smelting, and they are all regenerator hot blast stoves. Because of their intermittent working mode, multiple units must be cooperated to continuously provide high blast temperature to the blast furnace.Different Quenching and Tempering of GCr15 Bearing Steel Balls Classification of blast furnace hot blast stove The blast furnace hot blast stove can be divided into two categories: the hot blast stove with the external combustion structure and the hot blast stove with the internal combustion structure. In the hot blast stove with internal combustion structure, it is divided into top-fired type (the combustion chamber is placed on the upper part of the regenerator) and side-fired type (fire well combustion chamber and regenerator) due to the different relative positions between the combustion chamber and the regenerator.Vacuum brazing of elliptical corrugated horn

VOD type vacuum refining equipment is one of the most widely used out-of-furnace refining equipment in the world. It has many advantages such as simple equipment, low investment, low cost, many types of refined steel, high quality and convenient operation, so it has become an essential refining method for special steel plants.Low Pressure Vacuum Carburizing Heat Treatment Process for Transmission Gears VOD ladle refining furnace has many functions such as vacuum degassing, oxygen blowing decarburization, vacuum feeding, argon blowing stirring, non-vacuum temperature measurement and sampling, wire feeding and so on. It can refine bearing steel, alloy structural steel, spring steel, high-quality carbon steel and ultra-low carbon stainless steel. Low temperature carburizing of 9Cr18 stainless steel surface Because of its strong vacuum degassing ability, it can ensure that the content of hydrogen, oxygen, nitrogen and carbon in the steel reaches the lowest level, and accurately adjust the composition of molten steel, so that the inclusions can be fully floated, and the cleanliness of the steel can be effectively improved. Because it refines many types of steel and high quality, it can more flexibly adapt to the needs of market competition for users, and can refine the steel types required by the market in time, thereby increasing the economic benefits of the enterprise.Vacuum Heat Treatment Process of Cr12MoV Steel Die

The boiler is one of the important equipments in power plants and other industrial enterprises. Its function is to convert the energy stored in the fuel into heat energy through combustion, and transport it to various equipment in the form of steam or hot water. At present, most of the industrial boilers in our country are controlled manually, or are regulated by a simple instrument and a single-loop system, which wastes a lot of fuel. On-line quenching and tempering of high strength steel plate As a whole, the industrial boiler has many controlled and controlled variables and many disturbance factors, and there is obviously a complex relationship between many parameters. For the complex system of industrial boiler, because the internal energy conversion principle is too complicated, it is difficult to achieve the ideal control effect by conventional control in the past. Therefore, the intelligent control method can obtain better control effect.Surface Gas Nitriding Treatment of 2Cr13 Steel As an important power equipment, the task of the boiler is to supply qualified steam and make the boiler evaporation meet the requirements. For this reason, the main parameters of the production process must be strictly controlled. Boiler equipment is also a complex control object. The main input variables are load, boiler feed water, fuel amount, desuperheating water, supply air and induced air, etc. The main output variables are drum water level, steam pressure, superheated steam temperature, furnace negative pressure, excess Air, flue gas oxygen content, etc.What are the characteristics and advantages of the MIM process?

Analysis of Fan Safety Monitors for Cooling Towers The purpose of the fan safety monitoring and management is to automatically detect the changes of vibration, oil temperature and oil level, and display and record them.What are the applications of vacuum brazing of aluminum alloy? At the same time, the fan whose detection value exceeds the limit will be alarmed and stopped, so as to achieve the safe and stable operation of the fan. The purpose of reducing or even eliminating the occurrence of fan damage accidents. According to the actual situation of on-site management, the three parameters of "fan vibration", "lubricating oil temperature" and "gearbox oil level" are determined to be the most important operating parameters to ensure the safety of the fan. A total of 15 design parameters such as "measurement range", "measurement accuracy" and "inspection time" have been determined for R&D and production.Aluminum alloy vacuum brazing of heat exchangers The system uses multi-parameter combined probe technology, digital command coding technology and computer network management technology. The three-parameter combination probe is installed on the fixed seat of the berth ruler of the fan gear box, and its probe rod is directly inserted into the lubricating oil, which directly converts the oil temperature, berth and equipment vibration values in the gear box into electrical signals, and transmits them to the remote control room. Fan safety monitor. Each safety monitor can be connected with 8 combined probes with a four-core cable to monitor the operating parameters of 8 fans in real time, and complete digital display at the same time. Over-limit alarm, over-limit shutdown and other multi-phase functions. After many tests and modification designs, it has been successfully applied to the equipment production site, and various parameters have reached the predetermined design requirements.Vacuum Brazing of EGR Stainless Steel Cooler

The purpose of the energy-saving control and management of the fan is put forward, which is to realize the closed-loop automatic control of the fan operation. The temperature of the water supply is preset according to the needs of production. The influence of the climate and meteorological environment on the water temperature and the influence of the change of the system heat exchange conditions on the water temperature are reflected in time by the measured value of the temperature sensor, and finally the energy consumption of the cooling equipment is adjusted to reduce the temperature. Stabilize the water supply temperature and realize self-control and energy saving.On-line quenching and tempering of high strength steel plate It is generally believed that "frequency conversion technology" is an ideal method to complete the above process. However, the application of frequency conversion speed regulation technology in the fan control of circulating water cooling tower has the following limitations and defects:Surface Gas Nitriding Treatment of 2Cr13 Steel ① "Frequency control technology" can achieve high temperature control accuracy, but this is not very important in the circulating cooling water system. ②The energy loss of the inverter itself (the average operating efficiency is less than 90%) affects the energy saving effect. ③The variable speed operation causes the angle of attack of the fan blades to change (wind angle), and the fan runs away from the working point, which reduces the efficiency.What are the characteristics and advantages of the MIM process?

closed cooling tower 1. The closed cooling tower is a deformation and development of the traditional cooling tower. It is actually a combination of an evaporative cooling tower, a cooler and a wet cooling tower. It is a horizontal evaporative cooling tower. The process fluid flows through the tube and the air flows outside the tube, and the two do not touch each other. After the water in the reservoir at the bottom of the tower is extracted by the circulating pump, it is sent to the outside of the pipe to be sprayed evenly. It is not in contact with process fluid hot water or refrigerant and air outside the tube, and it becomes a closed cooling tower, which enhances the heat and mass transfer effect by spraying water.Vacuum brazing technology of laminated aluminum evaporator 2. The closed cooling tower is suitable for various cooling systems that require high circulating water quality, and has application prospects in electric power, chemical industry, steel, food and many industrial sectors.Influence of Vacuum Tempering Treatment on Carburized Gears On the other hand, compared with the air-cooled heat exchanger, the evaporative cooling tower utilizes the latent heat of evaporation of the water on the lower side of the tube to significantly enhance the heat and mass transfer on the air side, which also has obvious advantages. The closed cooling tower (also called evaporative air cooler) places the tubular heat exchanger in the tower, and ensures the cooling effect through the heat exchange of circulating air, spray water and circulating water. Because it is a closed cycle, it can ensure that the water quality is not polluted, well protect the efficient operation of the main equipment, and improve the service life. When the outside temperature is low, the sprinkler system can be stopped to save water. Pit Type Furnace Nitriding Process And Operating ProceduresPushing the implementation of the national energy conservation and emission reduction policy and the increasing scarcity of water resources, closed cooling towers have been widely used in industries such as iron and steel metallurgy, power electronics, machining, and air conditioning systems. The winter temperature in the northern region is usually below zero, and the problem of antifreeze in the operation of the closed cooling tower is becoming more and more prominent. If it is not solved well, the heat exchange tube or other components of the cooling tower may be frozen. According to different process characteristics, some closed cooling towers run all day in winter, some run part time, and some hardly use. But all need to consider the anti-freeze problem. If the closed cooling tower does not need to be operated in winter, the spray water and internal circulating water must be drained when it is shut down. Closed cooling tower, also known as closed cooling tower, evaporative cooler.Prevention method for grinding cracks of vacuum carburizing and quenching gears

Introduction of cross flow tower 1. Water is in the packing in the tower, the water flows from top to bottom, and the air flows horizontally from the outside of the tower to the inside of the tower. The two flow directions are vertical and orthogonal to a cooling tower. Commonly used in residential areas with strict noise requirements, it is a cooling cycle tower that is widely used in the air-conditioning industry. Advantages: energy saving, low water pressure, small wind resistance, also equipped with low-speed motor, no dripping noise and wind noise, easy maintenance of filling and water distribution system.Prevention method for grinding cracks of vacuum carburizing and quenching gears 2. According to the shape of the building, multiple foundations can be built and placed, and single or multiple cooling towers can be started according to the required water temperature.Pit Type Furnace Nitriding Process And Operating Procedures 3. It should be noted that: the frame needs 40% more heat exchange to have more filler volume, the filler is easy to age, the water distribution hole is easy to be blocked, the anti-icing is not good, and the moisture backflow is large. The advantages of cross-flow towers are the disadvantages of counter-flow towers.Influence of Vacuum Tempering Treatment on Carburized Gears

Features of Cooling Towers Counterflow tower 1. Water is filled in the tower, the water is from top to bottom, the air is from bottom to top, and the two flow in opposite directions. A cooling tower.How to Leak Detection of Vacuum Furnace 2. The countercurrent cooling tower has good thermal performance and is divided into three cooling sections: ①The space between the water distributor and the top of the filler, the water temperature in this section is relatively high, so the heat can still be transferred to the air. ② Filling water and air heat exchange section. ③ Filling to the water spraying section of the sump space, the water is cooled in this section, which is called "tail effect". In northern my country, the water temperature can drop by 1-2°C. To sum up, the counter-current tower is about 20% smaller than the cross-flow tower under the same conditions, and the heat exchange process of the counter-current tower is more reasonable and efficient.304 stainless steel cold rolling and vacuum annealing process 3. The water distribution system is not easy to block, the water filling is kept clean and not easy to age, the moisture backflow is small, and the anti-freezing and deicing measures are easier. Multiple units can be combined in design. In winter, the required water temperature and water volume can be combined with a single unit or all fans can be turned off. 4. The construction, installation and maintenance are easy and the cost is low. It is commonly used in air conditioners and industrial large and medium-sized cooling circulating water.How to control distortion in vacuum heat treatment of sheet parts? UBB

The main classification of nitrogen generators Cryogenic air separation nitrogen production Cryogenic air separation nitrogen production is a traditional nitrogen production method with a history of recent decades. It uses air as raw material, after compression, purification, and then use heat exchange to liquefy the air into liquid air. Liquid air is mainly a mixture of liquid oxygen and liquid nitrogen. Using the different boiling points of liquid oxygen and liquid nitrogen (under 1 atmosphere, the boiling point of the former is -183 °C, Effect of Vacuum Annealing Temperature on Stainless Steel Cold Rolled Sheetand the latter is -196 °C), through the rectification of liquid air , separate them to obtain nitrogen. Cryogenic air separation nitrogen production equipment is complex, covers a large area, has high infrastructure costs, large one-time investment in equipment, high operating costs, slow gas production: 12 to 24 hours, high installation requirements and long periods. Comprehensive equipment, installation and infrastructure factors, equipment below 3500Nm3/h, the investment scale of PSA unit of the same specification is 20% to 50% lower than that of cryogenic air separation unit. Cryogenic air separation nitrogen generator is suitable for large-scale industrial nitrogen production, while medium and small-scale nitrogen production is uneconomical.Vacuum heat treatment of sheet parts Molecular Sieve Air Separation for Nitrogen Production Using air as raw material, carbon molecular sieve as adsorbent, using the principle of pressure swing adsorption, and using carbon molecular sieve to selectively adsorb oxygen and nitrogen to separate nitrogen and oxygen, it is commonly known as PSA nitrogen production. This method is a new nitrogen production technology developed rapidly in the 1970s.Effect of Vacuum Annealing on Properties of 304 Stainless Steel Tensile Billets Compared with the traditional nitrogen production method, it has the advantages of simple process flow, high degree of automation, fast gas production (15-30 minutes), low energy consumption, product purity can be adjusted according to user needs in a large range, convenient operation and maintenance, and operation. Due to its low cost and strong device adaptability, it is quite competitive in nitrogen production equipment below 1000Nm3/h, and is increasingly welcomed by medium and small nitrogen users. PSA nitrogen production has become the first choice for medium and small nitrogen users. method.Vacuum Brazing and Heat Treatment Process of Stainless Steel Surgical Instruments

The role of push rod furnace Pusher furnace refers to a furnace that periodically pushes the charge or tray placed on the track into the furnace or out of the furnace by means of a pusher. When the workpiece is heated in the furnace, it is kept in a relatively static state for a certain period of time; when it is quenched out of the furnace, some trays are automatically tilted and the charge is poured into the quenching medium, and some are entered into the quenching medium together with the charge for cooling.Factors Influencing the Quality of Reaction Sintered Silicon Carbide This type of furnace has strong adaptability to different heat treatment processes, so it is easy to form a production line, and is widely used in heat treatment processes such as quenching, normalizing, annealing, tempering and carburizing, nitriding and carbonitriding.CVD/PCD Diamond Tool Brazing The main disadvantage of this type of furnace is that the feeding tray is repeatedly fed into the furnace for heating and cooling out of the furnace, resulting in large energy loss, that is, low thermal efficiency, and the feeding tray is easily damaged. Another disadvantage is that when different technical requirements are implemented for different types of workpieces, it is often necessary to push out all the original workpieces before the next workpiece can be pushed, that is, the process adaptability is poor.Vacuum Brazing and Heat Treatment Process of Stainless Steel Surgical Instruments

Features of Large Regenerative Magnesium Reduction Furnace Regenerative high-temperature combustion technology is the most advanced combustion technology in the world today, that is, there are evenly distributed nozzles on the furnace walls on both sides of the furnace. Design of Heating Chamber of High Temperature Vacuum Brazing Furnace When the nozzles on one side are burning as burners, the nozzles on the other side are Used as a flue to exhaust smoke. After a reversing cycle, through the switching of the reversing valve, the nozzle on one side of the burner becomes a flue for exhausting smoke, and the nozzle on the other side that was originally used for exhausting smoke is burned as a burner. Pollution causes of precision alloy vacuum furnace In this way, the heating, the efficient recovery of the heat of the flue gas and the high temperature preheating of the air are completed at the same time. The exhaust side nozzle enters the regenerator through the high-temperature gas channel, and exchanges heat with the regenerator in the regenerator. Finally, it is discharged into the atmosphere by the chimney. At the same time, the air enters the high-temperature regenerator on the other side that has been preheated by the high-temperature flue gas in the previous commutation cycle, and is preheated to 900-1050°C at the same time. After exiting the regenerator, it passes through the high-temperature gas channel. The nozzle on the side wall of the furnace is ejected, and the high-temperature air and fuel ejected from the nozzle are mixed and burned in the furnace.Influence of Reaction Sintering Process on Properties of Silicon Carbide Ceramics

The role of the bell furnace The hood furnace is a heat treatment furnace in which the furnace body is a hood, or the furnace bottom does not move, and the furnace hood moves, or the furnace hood does not move and the furnace bottom moves. It is used for batch heat treatment of workpieces.Influence of Reaction Sintering Process on Properties of Silicon Carbide Ceramics The traditional bell furnace uses nitrogen-hydrogen mixed gas as the protective medium. Compared with nitrogen, hydrogen has the advantages of good thermal conductivity, low density, low dynamic viscosity and strong reducibility, and gradually replaces the nitrogen-hydrogen mixed gas as the protective gas. At the same time, it puts forward more stringent requirements for the safety control of bell furnaces.Design of Heating Chamber of High Temperature Vacuum Brazing Furnace First of all, the metal shell of the protective cover and the furnace table are all tested by X-ray to strictly ensure the processing quality of each equipment. Second, at the beginning of the annealing cycle, check all gauges and switch positions so that they are in the correct setting. After the inner cover is fastened on the prepared furnace table, the leakage test of the hydrogen inlet valve is carried out, and then the leakage test of the furnace table space is carried out to ensure that the furnace table and the inner cover system are completely sealed. Each device conducts a rigor test. After passing the leak test, purge the furnace space with nitrogen. Nitrogen purging must meet three conditions to end, a certain amount of nitrogen purging, and the minimum nitrogen purging time: the oxidation content is less than 1%.Pollution causes of precision alloy vacuum furnace

Pusher furnace refers to a furnace that periodically pushes the charge or tray placed on the track into the furnace or out of the furnace by means of a pusher. When the workpiece is heated in the furnace, it is kept in a relatively static state for a certain period of time; when it is quenched out of the furnace, some trays are automatically tilted and the charge is poured into the quenching medium, and some are entered into the quenching medium together with the charge for cooling.Application of low pressure vacuum carburizing This type of furnace has strong adaptability to different heat treatment processes, so it is easy to form a production line, and is widely used in heat treatment processes such as quenching, normalizing, annealing, tempering and carburizing, nitriding and carbonitriding.Vacuum Brazing of Cemented Carbide and Martensitic Stainless Steel The main disadvantage of this type of furnace is that the feeding tray is repeatedly fed into the furnace for heating and cooling out of the furnace, resulting in large energy loss, that is, low thermal efficiency, and the feeding tray is easily damaged. Another disadvantage is that when different technical requirements are implemented for different types of workpieces, it is often necessary to push out all the original workpieces before the next workpiece can be pushed, that is, the process adaptability is poor. Types: (1) Push rod type ordinary box-type resistance furnace (2) Continuous carburizing automatic line (3) Push rod type gas carbonitriding furnace and its production line.Application of Pressureless Sintering of Silicon Carbide Ceramics