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.

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.

The maintenance of sintering furnace

The maintenance of sintering furnace

1. The new furnace and lining refractories of replacement should be done after drying process. Oven to falling in to rise in stages. At the beginning of the dry, low temperature, long time, when the stove is cold by warming, furnace material of high moisture. In less than 400 degrees Celsius, to open the oven door discharge water vapor. When up to 700 ℃ heat preservation for a period of time. In order to make the temperature of the furnace body evenly.
, mesh belt furnace, the furnace temperature has risen to 400 ℃, shall run for a period of time, for oxidation treatment, improve the life of the net belt.
2. The low melting point impurity in the compact (S, Pb, zinc, etc) to the chamber of a stove or furnace material and heating elements are produces erosion, in order to improve the service life of the furnace, should be regularly purification furnace, presintering area, in particular, try to avoid in the powder metallurgy ingredients add S elements, such as to avoid pollution furnace and heating elements.
3. Regularly clean the stove, in using carbon monoxide or he carbon gases, could be breaking from the decomposition of hydrogen compounds to the carbon, this part of the carbon deposition on the furnace wall and heating elements, it will pollution stove, refractory erosion and damage the electric heating yuan
, so need to regular cleaning the stove.
4. Keep the body clean, regular cleaning furnace of iron oxide, gravel, zinc oxide and other debris.
5. Check the electric heating element and wire connection, prevent poor contact arc.
6. Due to the need of furnace operation under the low dew point, so the leak bolted flange sealed parts regularly
Detection.
7. Do not insert with grease tray in furnace, grease into Shanghai in one thousand will make a sharp increase in dew point affect normal operation.
8. The high temperature, don't play to open the door for a long time, in order to prevent the air into the furnace, damage the electric heating element.
9. No overtemperature operation.

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.

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 maintenance and maintenance of vacuum sintering furnace

The maintenance and maintenance of vacuum sintering furnace

1, according to the PLC program of low vacuum: all the vacuum valve closed, start the mechanical pump, after waiting for its running normally (about 1 to 2 min), open to the furnace of low vacuum valve disc valve, in advance of furnace smoke low vacuum;
2, according to the PLC program, high vacuum, open the valve disc, the diffusion pump suction, after 15 Pa under vacuum, the system automatically open to preheat diffusion pump, diffusion pump in about after 45 min started its function, can closed on disc valve, at the same time open the main stop valve for vacuum degree of 1.33 x 10 Pa, the samples can only open the heating button to heat.
Vacuum sintering furnace maintenance guide equipment operators within the scope of responsibility of equipment point check parts, with the right inspection methods and tools based on the tally equipment daily maintenance cycle; The operator work should be carried out according to the daily maintenance manual. According to the technical requirements after the installation of complete equipment, perfect and has a good grounding, debugging and acceptance in accordance with the following items.

Vacuum Induction High Temperature Graphite Furnace

Vacuum Induction High Temperature Graphite Furnace

Vacuum induction high temperature graphite furnace adopts the medium frequency induction heating principle in a vacuum or inert gas conditions by allowing the induction coil generating an alternating magnetic field, and then the graphite crucible and the induction coil generates eddy currents were self-heating.Graphite crucible is to produce high temperature and make radiation to the workpiece to reach the desired temperature.Applications :sintering process for carbon materials, carbon fiber and other composite materials graphitization. Feature :
1.High automatic, it can be fully automation with the furnace model simulation display and real-time display device when running. It can be equipped with PLC controller and human-machine interface control system.
2.Very safe, using PLC to achieve security chain, with sound-light alarm when over-temperature, sensor burnout, over pressure of furnace and water, water flow, water temperature is too high .
3.It can be equipped with a built-in or external fast-cooling system,improving the working efficiency
4.Advanced temperature, vacuum detection instruments and sensor components to ensure reliability of the equipment
5.Energy-saving, special made coil and insulation structure, power output stability, high electrical efficiency.

Vacuum Through Hydrogen Sintering Furnace

Vacuum Through Hydrogen Sintering Furnace
     

   Vacuum through hydrogen sintering furnace is charged with hydrogen to protect the furnace state, adopting the principle of intermediate frequency induction heating to get the tungsten crucible coil generating heat by thermal radiation transfer to the sintered materials and refractory alloys, such as tungsten, molybdenum, titanium and its alloys molding powder sintering. It is equipped with safety explosion-proof equipment improve the safety of the equipment and realize the high voltage, low current, energy-saving effect.The insulation layer is made of a special structure design, improve equipment reliability. Automatic vacuum furnace temperature control which can provide multiple thermal curve for storage, select or recycling, the sintering process can be recorded and output. IGBT frequency power supply, with stable and high efficiency output.