Vacuum sintering furnace is used for sintering in vacuum

Vacuum sintering furnace is used for sintering in vacuum

The vacuum furnace product has the following characteristics: the vacuum furnace structure is reasonable, the heat is uniform, reliable insulation and temperature measurement, the temperature of the furnace is good. Reasonable heating structure, high quality material, guarantee the uniformity of furnace temperature under vacuum. The precision of temperature control is guaranteed by the domestic and international brand temperature control elements.
Vacuum sintering furnace is used for vacuum of vacuum sintering furnace, vacuum furnace for sintering structure must be reasonable and the loading area should be appropriate, to make good balance, vacuum sintering furnace temperature sintering material quality can be high. Vacuum furnace sintering furnace used for metal powder products, photoelectric element, ha rd alloy, magnetic alloy, ceramic powder materials, carbon fiber, carbon materials and its rare and refractory metal materials of high temperature sintering, have dewaxing function at the same time.
Vacuum sintering furnace equipment arrangement
Compact and reasonable, the area is small. Advanced automation control, comprehensive PLC automatic control and protection of water, electricity, gas system, PLC to realize the safety chain, has overtemperature, sensors, broken accidentally, water pressure, furnace pressure, water flow, water temperature higher sound and light alarm. Resistance heating is adopted in the vacuum furnace, high precision of temperature control, no noise, no pollution to the power grid, high power utilization. The cold and high temperature sections are controlled by different temperature control elements, and the automatic switch is automatic. The cooling is cooled by natural cooling, and the cooling can be cooled by charging the inert gas.

How to maintain the vacuum sintering furnace

How to maintain the vacuum sintering furnace

A vacuum sintering furnace is a device that reduces the shape of an object or substance by heating it at high temperatures.It could reduce objects in space, grain boundary gradually gathered, solid particles gradually connection, so as to realize the density increases, the decrease of the object of the polycrystalline sintered body equipment.
How should vacuum sintering furnace be maintained in peacetime?
1, the import and export of the equipment, the driving bunker must ensure the clean and clean.
The cleaning of the discharge mouth will clean up the organic matter.
The main body of the chamber is to see if the pores are blocked.
If there is organic material on the lamp tube, it can be cleaned with non-woven or alcohol cotton.
The diagonal mesh band will be able to be softened and then scooped out when it is delivered 120.
The belt of the thimble can be polished with sandpaper to prevent damage to the battery.

Vacuum sintering furnace what procedures?

Vacuum sintering furnace what procedures?

Vacuum sintering furnace is mainly in a vacuum or protective atmosphere conditions, by using the principle of intermediate frequency induction heating, let the hard alloy cutter and a variety of metal powder compacting sintering of implementation of a complete set of equipment, is specially designed for hard alloy, ceramic and metal industrial production and design, it is in the face of the heated object in vacuum environment protective sintering furnace, vacuum sintering furnace heating mode is very much, have induction heating, resistance heating and microwave heating and so on.
Based on rich experience of vacuum sintering furnace operating personnel to the manufacturer's recommendations, some industrial manufacturers will develop some vacuum sintering furnace operational procedures, so what is the vacuum sintering furnace operation procedures? Actually, these regulations is before operating the equipment, check equipment above some of the commonly used spare parts if there are any problems, in order to avoid an accident, is mainly in order to ensure the safety of operating personnel and improve the working efficiency of the equipment.
1, vacuum sintering furnace must be full of the inside of the reservoir water, and water there can be no impurities. Start the pump, intermediate frequency power supply, furnace cooling system and vacuum furnace sensor circulation normal, and adjust the water pressure, its control above the value of the rules.
2, check the power of the vacuum pump system, vacuum pump oil is already inside the oil seal the centerline of the observation hole. Check after the artificial the rotation of the vacuum pump pulley, if there is no exception, can under the condition of the closing butterfly valve, vacuum pump.
3, check the internal condition of vacuum sintering furnace, furnace body within the level of health, the induction coil, better insulation, vacuum sealing tape to have certain elasticity, and size to be qualified. Check the vacuum sintering furnace of flexible lever handle is started.
4, after the requirements of the vacuum degree reach, start frequency, adjustment of intermediate frequency power, according to the relevant provisions of sintering operation. After sintering, the stop frequency, press the stop frequency conversion switch, inverter to stop working, the intermediate frequency power supply points total brake brake and power off.
5, from inside the furnace of the observation hole observation, in the event of a stove or furnace black, then turn off butterfly valve, vacuum pump and disconnect current of vacuum pump, and then use tap water to cooling and induction coil, furnace, finally to stop the pump.

Vacuum atmosphere furnace equipment must be used under what conditions

Vacuum atmosphere furnace equipment must be used under what conditions

1. Vacuum atmosphere furnace equipment must be used in the following conditions:
1) indoor use, environment temperature in - 10 ~ 40 ℃;
2) no more than 1000 meters above sea level;
3) environmental relative humidity less than 85% RH;
4) the environment without conductive dust, inflammable and explosive objects and gases, and serious damage to metal corrosive gas;
5) no vibration and turbulence,
2. Check the circuit connection parts contact are in good condition.
3. The proper use of standardized operation, the highest temperature of 1200 ℃ can't use for a long time, overheating, overload operation of avoid by all means, keep a sudden rise in moderate quench the blackout, so as not to damage the furnace and heating wire.
Contains 4. It is strictly prohibited to high moisture, volatile matter, organic matter and other artifacts directly into the furnace heat treatment.
5. It is strictly prohibited to high temperature melting material such as metal, glass, in the absence of crucible loaded into the furnace under the condition of heat treatment.
6. Always check the electric heating element, in case of aging, fracture, short circuit should be timely repair and replacement.
7. Often remove the scrap material in furnace dust particles and fallout, etc, in order to keep clean inside the furnace.
8. It is strictly prohibited to overload the use of this equipment, so as not to cause damage of equipment structure.

Excellent performance of vacuum furnace

         Excellent performance of vacuum furnace

The pressure inside the chamber of a stove or furnace smoke into industrial furnace is lower than the atmospheric pressure. Vacuum furnace heating power, the heated surface oxidation, no decarburization, small deformation, the mechanical performance is good. Use the vacuum furnace smelting metal to remove impurities, less finished pinhole, segregation of small, good quality. Vacuum furnace is suitable for the high quality, high purity, refractory metal melting and heating, such as tungsten, molybdenum, tantalum, niobium, titanium, heat-resistant alloy steel smelting and magnetic materials, electrical materials of high strength steel, stainless steel, tool steel and die steel, heat treatment.
Before and after vacuum furnace appeared in the 1930 s. In 1927 the United States made electrical material vacuum annealing furnace. Vacuum since 1953 arc furnace power consumption in industry have been used for melting titanium sponge. Before and after the '50 s vacuum induction furnace is widely applied in industry. In 1960 the United States developed oil quenching vacuum furnace.

Vacuum atmosphere furnace equipment must be used under what conditions

Vacuum atmosphere furnace equipment must be used under what conditions

1. Vacuum atmosphere furnace equipment must be used in the following conditions:
1) indoor use, environment temperature in - 10 ~ 40 ℃;
2) no more than 1000 meters above sea level;
3) environmental relative humidity less than 85% RH;
4) the environment without conductive dust, inflammable and explosive objects and gases, and serious damage to metal corrosive gas;
5) no vibration and turbulence,
2. Check the circuit connection parts contact are in good condition.
3. The proper use of standardized operation, the highest temperature of 1200 ℃ can't use for a long time, overheating, overload operation of avoid by all means, keep a sudden rise in moderate quench the blackout, so as not to damage the furnace and heating wire.
Contains 4. It is strictly prohibited to high moisture, volatile matter, organic matter and other artifacts directly into the furnace heat treatment.
5. It is strictly prohibited to high temperature melting material such as metal, glass, in the absence of crucible loaded into the furnace under the condition of heat treatment.
6. Always check the electric heating element, in case of aging, fracture, short circuit should be timely repair and replacement.
7. Often remove the scrap material in furnace dust particles and fallout, etc, in order to keep clean inside the furnace.
8. It is strictly prohibited to overload the use of this equipment, so as not to cause damage of equipment structure.

The characteristics of sintering furnace atmosphere

The characteristics of sintering furnace atmosphere

Atmosphere sintering furnace by using the most advanced temperature measurement, temperature control technology, intelligent techniques, new materials and furnace design, suitable for more atmosphere of all kinds of solid high temperature synthesis, calcining, roasting, sintering, ashing, incineration, melting and heat treatment, etc., has been adapted for use by the world first-class laboratory. The inner loop water cooling system, digital flow monitoring and control system; Using high-performance medium frequency contactor of furnace, automatic conversion; Water, electricity, gas comprehensive PLC automatic control and protection system. The characteristics of sintering furnace atmosphere:
1, atmosphere sintering furnace using special industrial microwave source, can be continuous and stable operation;
2, microwave stepless adjustable output power, achieve precise temperature control curve of temperature;
3, atmosphere sintering furnace adopts imported raytek infrared thermometer, direct measurement of the sample temperature, data are true and correct;
4, special crucible and insulation structure choice, for material non-polluting;
5, can process various microwave properties of materials, excellent versatility;
6, atmosphere sintering furnace gas channel is equipped with two road, fine controllable atmosphere;
7, real-time temperature curve, according to realize the dynamic monitoring of the heating process;
8, the microwave shielding atmosphere sintering furnace safe and reliable design, multiple anti leakage protection.
9, equipped with embedded microcomputer control system, provide manual and automatic, constant temperature three operating modes and are free to switch.

How to pick a good vacuum furnace?

How to pick a good vacuum furnace?

Vacuum furnace varieties have a lot of, including vacuum furnace pressure type vacuum furnace, vacuum furnace, high pressure and high temperature type tubular vacuum furnace, etc., equipment, the corresponding use is also different, so how to choose a good vacuum furnace? Suitable vacuum furnace?
From the perspective of process, the design of vacuum furnace will make a good product. Vacuum heat treatment process can improve the service life of the parts, is the contemporary advanced heat treatment process, it has been generally recognized by the people.
Vacuum furnace parts heat treatment was conducted under the vacuum state, and completely avoids the problem of oxidation, the parts after vacuum heat treatment is more stable and reliable performance, has provided the safeguard for high precision workpiece.
When we were in the use of vacuum furnace, heat treatment process will face some problems in the vacuum furnace can't complete, investigate its reason, generally there are two aspects: one is the vacuum furnace manufacturer in accordance with the standards of vacuum furnace production of vacuum furnace, although the technical parameters of qualified, but not yet fully in the process of production of the vacuum furnace system to consider the heat treatment process, resulted in the vacuum furnace and heat treatment process parameters do not match. Second, vacuum heat treatment process was flawed, cannot achieve the desired results. In this respect we put the heat treatment process and vacuum furnace manufacturing organic unifies in together, the effect is obvious. Through understanding the process and details of each process, design and manufacture for vacuum furnace and heat treatment process and perfect fit, solved the trouble back at home for vacuum furnace users.

Vacuum pressure sintering furnace

Vacuum pressure sintering furnace

In vacuum pressure sintering furnace this equipment, sintering material under high temperature is also subject to mechanical stress and the effect of vacuum, can be used in the sintering density after casting products. General powder material filling in the graphite mold, mechanical pressure by 700-1500 mn/m3, and heated to 2500 ℃ in the vacuum. Mold by direct current heating, indirect heating.
Vacuum pressure sintering furnace is mainly used for sintering is the density of the material with high temperature gas reactions billet, such as oxide, carbide and boride gas after sintering material can reach very high density, general density is greater than the theoretical value of 95%, and with high purity. Graphite resistor and graphite mould in the vacuum operation of weight loss is minimal. Vacuum hot pressing sintering is at the same time in the compaction process and utilization of high pressure, temperature and time, and many other parameters to control the quality of the sintered body.

The characteristics of the vacuum furnace temperature field formed

The characteristics of the vacuum furnace temperature field formed

Vacuum furnace heating elements generally assumes the circular layout. Relative average furnace, vacuum heating only the heat transfer of radiation, conduction and convection; The vacuum heat conduction, convection and radiation, three ways of convection and conduction depending on the pressure and with ordinary furnace (normal pressure).
Pressure is less than 1 x 105 pa (absolute pressure, ordinary furnace approximation of working pressure), the convection and conduction effect is less than ordinary furnace; Working pressure close to the vacuum (pa) 2, the convection and conduction effect basic does not exist, workpiece temperature is slow, especially below 600 ℃ heating, heating more slowly, the temperature of the workpiece temperature thermocouple temperature control has certain hysteresis.
The vacuum furnace temperature uniformity measurement is different from ordinary furnace, when measuring the need to guarantee the normal work of the furnace under the condition of vacuum and pressure rise rate, can correct determination of furnace temperature. Because, unlike ordinary furnace, vacuum furnace heat transfer of actual temperature measurement process shows that the control thermocouple temperature at the beginning of the heat preservation and the effective heating area measuring thermocouple temperature difference is bigger. In vacuum condition, temperature deviation in the normal heat preservation time of the effective heating area can reach + / - 5 ℃, meet the needs of the process.

Little knowledge of vacuum sintering furnace

Little knowledge of vacuum sintering furnace

Vacuum sintering furnace in the furnace chamber within a particular space using vacuum system (by the vacuum pump, vacuum measuring device and vacuum valve components such as carefully) substances out of furnace cavity part, making furnace chamber pressure is less than a standard atmospheric pressure, so as to realize a vacuum furnace cavity space, that is the vacuum sintering furnace.
1) completely eliminates the oxidation and decarburization on the surface of the workpiece during the process of heating, clean surface without metamorphic layer can be obtained. That only when grinding mill side of cutting tools (such as twist drill grinding after make direct exposure to edge) of the decarburization layer of the grooved surface cutting performance greatly improved relations.
2) on the environment pollution-free, "three wastes" treatment is not required.
3) obviously improve the temperature measurement, the monitoring precision. Indicated value of thermocouple temperature and furnace temperature reached plus or minus 1.5 ° c. But in different parts of a large number of artifacts in the furnace temperature difference is bigger, if USES the rarefied gas forced circulation, can still be controlled within + / - 5 ° c temperature difference.
4) high degree of mechanical and electrical integration. Increase in the temperature measurement and control accuracy, on the basis of the workpiece moving, pressure adjustment, power adjustment, etc all can set programming in advance, according to the steps to implement the quenching and tempering. 5) energy consumption significantly below the salt bath furnace. Modern advanced vacuum furnace heating chamber is made of high quality insulation material of insulation walls and barriers, electric energy can be highly focused on indoor heating, energy saving effect is remarkable.

Vacuum furnace large analytical performance advantage is obvious

Vacuum furnace large analytical performance advantage is obvious

Vacuum furnace, just as its name implies, it operates within the furnace is in a vacuum, so to avoid the defect of the many other each type coal stove.
1, completely eliminates the oxidation and decarburization on the surface of the workpiece during the process of heating, clean surface without metamorphic layer can be obtained. That only when grinding side grinding tool cutting performance greatly improved relations.
2, on the environment pollution-free, "three wastes" treatment is not required.
3, obviously improve the temperature measurement, the monitoring precision. Indicated value of thermocouple temperature and furnace temperature reached plus or minus 1.5 ° c. But in different parts of a large number of artifacts in the furnace temperature difference is bigger, if USES the rarefied gas forced circulation, can still be controlled within + / - 5 ° c temperature difference.
4, high degree of mechanical and electrical integration. Increase in the temperature measurement and control accuracy, on the basis of the workpiece moving, pressure adjustment, power adjustment, etc all can set programming in advance, according to the steps to implement the quenching and tempering.
5, significantly below the salt bath furnace energy consumption. Modern advanced vacuum furnace heating chamber is made of high quality insulation material of insulation walls and barriers, electric energy can be highly focused on indoor heating, energy saving effect is remarkable.

Vacuum furnace processing technology rapid development, and expand the application range

Vacuum furnace processing technology rapid development, and expand the application range

According to the characteristics of the vacuum brazing process and technical requirements, based on the 3 room of PLC technology to achieve the continuous vacuum brazing of integrated automation system, discusses on the principle of the vacuum brazing brazing, 3 rooms continuous brazing furnace system function, technological process, the function of PLC. With the development of science and technology, make the vacuum heat treatment technology is developing rapidly, expanding the range of application. Be processed materials from titanium, niobium alloy, high temperature alloys, magnetic material to the tool steel, die steel, high speed steel, alloy structural steel, bearing steel, alloy tool steel, spring Huang Gang, etc. The application of the vacuum heat treatment at home and abroad focus on aviation, spaceflight, auto, tools, mold and other industries, and in the automotive industry in recent years, the application of the rapidly, especially in vacuum furnace. And with the advent of 3 rooms the continuous vacuum soldering furnace, realize the continuous brazing process, for enterprises to save production costs, improved the production efficiency, optimize the production process.

The classification of vacuum sintering furnace and the specific use for details

The classification of vacuum sintering furnace and the specific use for details

Vacuum sintering furnace is mainly used for metal powder products, metal injection forming products, hard alloy, ceramic, sintered ndfeb, stainless steel, non-woven fabrics, etc. High temperature of vacuum sintering furnace and vacuum heat treatment furnace structure is basically the same, just according to the sintering process make the appropriate changes.
Vacuum sintering furnace is divided into double vacuum sintering furnace and single loop outdoor pressurized air cooled vacuum sintering furnace Double the same sintering furnace, vacuum sintering furnace has two public a set of vacuum system and electric control system; In operation, two furnace for heating and cooling, mutual used interchangeably. No.1 has one time in the same furnace, degreasing, the function of the sintering and sintering. Degreasing system including external pipeline, vacuum valve, condenser, collector and mechanical pump device. Single cycle outdoor pressurized air cooled sintering furnace need high vacuum pumping speed of vacuum unit, to meet the requirements of ndfeb sintering process. This furnace structure and single loop outdoor pressure gas quenching vacuum furnace are the same.

Vacuum sintering cemented carbide is the main production process

Vacuum sintering cemented carbide is the main production process

Vacuum dewaxing sintering furnace can be a one-time degumming, sintering, cooling and molding charge of a full set of technical process. In the traditional drying sintering furnace structure added a graphite on the basis of the tank, and low voltage carrier gas dewaxing process is adopted to be collected wax device isolated after bonding (molding) agent, residual gas in a variety of ways.
With the above process, forming agent is not in the oven and it touches a cold surface accumulated inside the furnace, also won't pollution insulation and heating element. Vacuum sintering cemented carbide is the main production process, the sintering process for vacuum dewaxing sintering furnace temperature must be integrated according to the corresponding to the sintering products in the process of sintering temperature curve to carry on the control, the tracking error and overshoot amount have strict index requirements.

Vacuum sintering furnace is how to work?

Vacuum sintering furnace is how to work?

 

Vacuum sintering furnace is in a vacuum environment to be heated objects in protective sintering furnace, its heating mode is more, such as resistance heating, induction heating, microwave heating, etc. Vacuum induction furnace is heated objects to make use of induction heating protective sintering furnace, can be divided into the power frequency, medium frequency, high-frequency, such as type, can be ascribed to a subclass of vacuum sintering furnace.
Vacuum sintering furnace can meet the requirements of rapid heating process; Intelligent temperature control switches use imported more sections program c the instrument control, c the stability of the control switches, repeatability is very reliable; Frequency conversion stepless speed regulation, stainless steel mesh belt transmission, the appearance of the new design concept, to ensure that the product smooth conveying.
Vacuum sintering furnace by using the principle of intermediate frequency induction heating, the high temperature of tungsten crucible in the winding, by heat conduction to work on, suitable for scientific research, military units for hard metal such as tungsten, molybdenum and its alloy powder sintering molding.

The design of vacuum sintering furnace

The design of vacuum sintering furnace

Vacuum sintering furnace with perfect performance design, integrating multiple patents at a suit, security, reliability and practicability of the best results. The design of vacuum sintering furnace advantages are:
1, using vacuum forming technology, electric stove wire inlay on the inner surface of the ceramic plate, a molding chamber of a stove or furnace tank, to prevent pollution by volatile matter.
2, the four sides of electric stove wire installed in the chamber of a stove or furnace, special heat insulation design, furnace can be replaced.
3, double shell, air circulation and heat insulation, the surface temperature is low.
4, fast loading quickly open the oven door design, loading convenient, structure of double ended, the outer pressure vessel welding technology.
5, with the door automatic power-off protection design, has the ultra high temperature alarm function, with functions of thermocouple damaged power outages, with functions of built-in password control parameters.
6, with no paper record history data and curve of temperature, the temperature deviation error correction function, can manage multiple devices and remote fault diagnosis analysis.
7, multiple security protection design, safety performance is good, long service life.

The vertical design of the control system of high temperature and vacuum sintering furnace

The vertical design of the control system of high temperature and vacuum sintering furnace

Vertical high temperature vacuum sintering furnace system structure and function. Based on the system requirements and design of the operating process based on distributed, modular DCS control solutions. Detailed discusses the hardware configuration and software design of the control system, realize the real time monitoring of production process equipment operation condition and was accused of amount of online real-time display. This control scheme has simple hardware, the configuration of flexible characteristics, applicable to small and medium-sized control system.
With the continuous development of science and technology, industry, national defense, aerospace and other fields in China have made great progress, the vacuum furnace equipment manufacturing equipment level, production process, control technology also has the very big enhancement. Prompted materials along with the continuous improvement of science and technology in the field of development, in the aviation, aerospace, military industry, energy and chemical industry in areas such as some special material, the new material has been widely used. The vacuum heat treatment technology in the production of these special materials, new materials manufacturing process plays a more and more important role. Vertical high temperature vacuum sintering furnace is mainly suitable for cemented carbide, ceramics, magnetic materials, porous materials of vacuum sintering, can meet all kinds of high temperature oxidation resistant coating the surface of the parts sintering requirements, is developed for a domestic space military enterprise space equipment specialized equipment, mainly by the vacuum system, furnace, bottom sliding on the oven door and locking mechanism, closed water system, heating power systems and electrical automatic control system, etc.

The main characteristics of the vacuum furnace

The main characteristics of the vacuum furnace

Is a vacuum induction melting equipment, can be through vacuum conditions using the intermediate frequency induction heating principle of molten metal and sintering power. Its application in the field of metal materials, such as nickel, special steel, precision alloy, copper alloy, metal dysprosium, ndfeb, active metal, high temperature alloy, special materials, magnetic materials, etc. These metal materials can be melt, casting in vacuum or protective atmosphere sintering test.
Features:
1. Temperature as high as 3000 degrees Celsius;
2. Far infrared thermometer.
3 water cooling;
4. The pid control;
The highest temperature: 3000 ° C
High volume: 0.01 m3, 0.01 m3 and 0.02 m3, 0.05 m3, 0.1 cubic meters, 0.15 cubic meters, 0,0.3 m3
Working atmosphere: vacuum furnace, hydrogen, nitrogen, the inert gas
Temperature uniformity: plus or minus 10 ° C or less
The measurement of temperature: 800 ~ 3500 ° C temperature or 0 ~ 3500 ° C infrared optical fiber temperature measurement range. Accuracy: 0.2 ~ 0.75%.
Temperature control: process control and manual control; Control accuracy: + / - 1 ° C
Limit GongReLv: 200 ° C/min (hot blast stove, according to the size and the high temperature furnace configuration).

Vacuum sintering cemented carbide is the main production process

Vacuum sintering cemented carbide is the main production process

Vacuum dewaxing sintering furnace can be a one-time degumming, sintering, cooling and molding charge of a full set of technical process. In the traditional drying sintering furnace structure added a graphite on the basis of the tank, and low voltage carrier gas dewaxing process is adopted to be collected wax device isolated after bonding (molding) agent, residual gas in a variety of ways.
With the above process, forming agent is not in the oven and it touches a cold surface accumulated inside the furnace, also won't pollution insulation and heating element. Vacuum sintering cemented carbide is the main production process, the sintering process for vacuum dewaxing sintering furnace temperature must be integrated according to the corresponding to the sintering products in the process of sintering temperature curve to carry on the control, the tracking error and overshoot amount have strict index requirements.