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.

The role of the low-pressure sintering furnace

                          The role of the low-pressure sintering furnace

Low pressure sintering furnace is compatible with the dewaxing, vacuum sintering, low pressure sintering, low pressure processing, multiple functions such as sintering atmosphere. Mainly used for: pressure before products of low pressure sintering; The low pressure processing of sintered products; The carbon sintering pressure products.
Low pressure sintering's main function is to reduce the microscopic pore in cemented carbide. The porosity of the sintered body in the vacuum sintering stage has been eliminated. Microscopic pore pressure stage mainly eliminated.
Low porosity is an important symbol of high quality hard alloy, try to reduce the porosity in the cemented carbide in the production, is one of the main pursuit of carbide workers.
Carbide densification and capillary force, the wettability of liquid phase for solid phase and the surface tension of the liquid has a close relation with the associated, as in the process of sintering temperature, when a liquid phase, due to the capillary pressure, the liquid phase to the surface of WC mobile, because the liquid has good wettability to WC phase, liquid phase was attached to the surface of WC, because the surface tension of the liquid phase, driven by liquid package WC mobile, strong contraction occurs at this point. In WC mobile liquid package, in the process of contraction, exists in the gas is out of briquetting, due to the flow of the liquid phase, a part of the porosity of the sintered body is liquid closed, with the augmentation of the contract, enclosed within the pore pressure, when the surface tension is equal to or less than the pressure in the pore, closed pore preserved in the alloy, microscopic pore space.

The main performance parameters of the powder sintering furnace

The main performance parameters of the powder sintering furnace

Power supply: 380 v, 50 hz
Working temperature: room temperature + 10-250 ℃, at any temperature can be set
The shell material: hot rolled steel plate, the surface coating of paint
The tank system material: high temperature resistant stainless steel plate, silicon carbide combined with silicon nitride muff
Heater: stainless steel pipe spiral wire electric heater, silicon carbon rod
Heater location: two layers of heating up and down
Insulation: 1260 aluminum silicate cotton carbon
Temperature control: PID temperature controller, LED digital display, buttons, automatic constant temperature
Temperature sensing element: S type high temperature thermocouple
Security protection, short circuit protection, overload protection, motor thermal overload, open phase protection, nitrogen in the hearth, decomposition of ammonia gas, such as protection, adopt import stainless steel mesh belt, transmission system adopts frequency control of motor speed.

Sintering furnace experimental purposes

Sintering furnace experimental purposes

After sintering: pressure molding powder material under high temperature below the melting point of the role, through particle mutual bonding and mass transfer between body, make the porosity, volume shrinkage, strength increase, gradually became a certain geometry shape and intensity of the process.
The goal of the sintering is the powdery material into a compact body, and give the performance of the material characteristic. Sintering furnace is used for sintering. Vacuum hot pressing sintering furnace and discharge plasma sintering furnace (SPS), etc. Can be powder sintering molding directly.
Box high temperature furnace with resistance wire heating element, using double shell structure and 40 program temperature control system, the phase shift trigger, thyristor control, furnace adopts polycrystal alumina fiber materials imported from Japan, double layer between the furnace shell is equipped with air cooling system, can rise quickly cooling, &energy-saving equilibrium temperature field, low surface temperature, cooling rate, the advantages of energy saving, is the institutions of higher learning, scientific research institutes, industrial and mining enterprises, powder sintering, ceramic sintering, high temperature experiment, quality testing with an ideal experimental equipment.

Sintering zone of sintering furnace

Sintering zone of sintering furnace

Sintering belt sintering furnace vacuum induction furnace is under vacuum or protective atmosphere conditions, using the principle of intermediate frequency induction heating make hard alloy tool bit and all kinds of metal powder compacting sintering of complete sets of equipment, is for hard alloy, metallic dysprosium, designed in the industrial production of ceramic materials. High temperature hydrogen sintering furnace is the protective atmosphere of hydrogen under the conditions of reaction sintering furnace.

Powder sintering furnace, sintering furnace performance characteristics

    Powder sintering furnace, sintering furnace performance characteristics

Mainly used for sintering of powder metallurgy products.
1: the whole equipment by furnace, mesh belt drive system of temperature control system and atmosphere control system.
2: the furnace by the feeding section, presintering, sintering, slow cooling section, cooling and discharging section.
3: mesh belt drive system is composed of high temperature resistant net belt and driving device.
4: mesh belt speed adjustment by the frequency converter, equipped with digital display type mesh belt speed measuring device, can direct reading speed of net belt.
5: by the thermocouple temperature control system, digital display type of intelligent PID controller and SCR, form a closed-loop control system, which can realize automatic precise temperature control
6: protective atmosphere, according to the flow rate of gas flow meter can be adjusted according to the requirements of the process flow of various kinds of atmosphere.
7: cooling water temperature is controlled by temperature control components solenoid valve open and close to realize automatic control.

Vacuum sintering furnace exquisite workmanship

Vacuum sintering furnace exquisite workmanship

Vacuum sintering furnace play an irreplaceable role in mold production, mainly used in ceramic sintering, vacuum smelting and electric vacuum parts in addition to gas, annealing, brazing of the metal, and ceramic to metal seal, etc.
Vacuum sintering furnace, vacuum heat treatment can achieve almost all heat treatment process, such as quenching, annealing, tempering, carburizing, nitriding, during the quenching process can realize gas quenching, quenching oil, water nitrate quenching, quenching, etc., can also be vacuum brazing, sintering and surface treatment, etc. Vacuum furnace thermal efficiency is high, which can realize the rapid heating and cooling, which can realize no oxidation and decarburization, carburizing, can remove phosphorus crumbs on the surface of the workpiece, and has the effect such as degreasing degassing, so as to achieve the surface brightness purification effect. Generally speaking, the processed workpiece in the heating furnace is slow, and internal temperature difference is small, the thermal stress is small, so little deformation. Product qualified rate is high. Can reduce costs, have degassing effect, so as to improve the mechanical properties of the work and life. Good working environment, safety operation, no pollution and no pollution. Be processed workpiece no hydrogen embrittlement risk, to prevent surface of the titanium and refractory metal shell hydrogen embrittlement, stability and repeatability of vacuum heat treatment process. A series of advantages, the development of vacuum heat treatment equipment and technology is more and more attention and applied more and more widely.
Two professional vacuum heat treatment of vacuum technology and heat treatment technology that combines an integrated, refers to the whole and part of heat treatment process in a vacuum. Our country could be divided into low, medium and high vacuum and high vacuum.

High vacuum sintering furnace

      High vacuum sintering furnace

High vacuum sintering furnace is used in kinds alloy materials, components, magnetic rare earth materials, hydrogen storage alloy, activity and refractory metals vacuum sintering, aging heat treatments. This equipment was based on international excellent equipment technology, after many times improvement, using unique internal (external) air flow circulation method and powerful vacuum pump group, it has cooling average, high speed, temperature uniformity, large sucking rate, temperature uniformity controllable, high vacuum degree and no leakage advantages. Cooling method divide into internal circulation (RVSX) and external circulation (RVS)

The control system was controlled by PLC, temperature was controlled by intelligent temp controller, accurate control, high automation. User can choose auto or manual undisturbed switching to operate it, this furnace has abnormal condition alarming function, easy to operate.
Environmental protection performance has been improved, maintenance cost saving, energy cost saving.

The role of the low-pressure sintering furnace

The role of the low-pressure sintering furnace

Low pressure sintering furnace is compatible with the dewaxing, vacuum sintering, low pressure sintering, low pressure processing, multiple functions such as sintering atmosphere. Mainly used for: pressure before products of low pressure sintering; The low pressure processing of sintered products; The carbon sintering pressure products.
  Low pressure sintering's main function is to reduce the microscopic pore in cemented carbide. The porosity of the sintered body in the vacuum sintering stage has been eliminated. Microscopic pore pressure stage mainly eliminated.
  Low porosity is an important symbol of high quality hard alloy, try to reduce the porosity in the cemented carbide in the production, is one of the main pursuit of carbide workers.
Carbide densification and capillary force, the wettability of liquid phase for solid phase and the surface tension of the liquid has a close relation with the associated, as in the process of sintering temperature, when a liquid phase, due to the capillary pressure, the liquid phase to the surface of WC mobile, because the liquid has good wettability to WC phase, liquid phase was attached to the surface of WC, because the surface tension of the liquid phase, driven by liquid package WC mobile, strong contraction occurs at this point. In WC mobile liquid package, in the process of contraction, exists in the gas is out of briquetting, due to the flow of the liquid phase, a part of the porosity of the sintered body is liquid closed, with the augmentation of the contract, enclosed within the pore pressure, when the surface tension is equal to or less than the pressure in the pore, closed pore preserved in the alloy, microscopic pore space.