Vacuum furnace, that is, in the specific space of the furnace chamber, the use of vacuum system (vacuum pump, vacuum measuring device, vacuum valve and other components are carefully assembled) to discharge part of the material in the furnace chamber, so that the pressure in the furnace chamber is less than a standard atmospheric pressure, the space in the furnace chamber to achieve a vacuum state, which is the vacuum furnace.

Product Introduction:

Equipment for heating in a vacuum environment. The high vacuum pump system is connected by pipes in a furnace sealed by a metal casing or a quartz glass casing. Furnace vacuum up to 133×(10-2 ~ 10-4)Pa. The heating system in the furnace can be heated directly with resistance wire (such as tungsten wire), and also can be heated by high-frequency induction. The temperature can reach about 3000℃. It is mainly used in ceramic firing, vacuum smelting, electric vacuum parts degassing, annealing, brazing of metal parts, and ceramic-metal sealing.

advantage:

1) The oxidation and decarbonization of the workpiece surface during the heating process can obtain a clean surface without metamorphic layer. This is important for the cutting performance of tools that grind only one side during sharpening (such as twist drill grinding after the decarburization layer of the groove surface is directly exposed to the cutting edge).

2) No pollution to the environment, no need for three waste treatment.

3) The accuracy of furnace temperature measurement and monitoring has been significantly improved. The indicated value of the thermocouple and the furnace temperature reach ±1.5°c. However, the temperature difference of different parts of a large number of workpieces in the furnace is large, and if the rarefied gas is forced circulation, it can still be controlled within the temperature difference range of ±5°c.

4) High degree of mechatronics. Based on the improvement of temperature measurement and control accuracy, workpiece movement, air pressure adjustment, power adjustment, etc. can be pre-programmed, and quenching and tempering can be implemented step by step.

5) Energy consumption is significantly lower than that of salt bath furnace. The modern advanced vacuum furnace heating chamber uses thermal insulation walls and barriers made of thermal insulation materials, which can highly concentrate the electric heating energy in the heating chamber and save energy

Feature:

Vacuum quenching (tempering, annealing) is a treatment method that achieves the expected performance by heating and cooling the material or part in the vacuum state according to the process regulations.

Vacuum brazing is a welding process in which a group of welds is heated to a temperature above the melting point of the filler metal, but below the melting point temperature of the base metal, with the help of the wetting and flow of the filler metal to the base metal to form a weld (brazing temperature varies with different materials).

Vacuum sintering is a method of heating the metal powder products in the vacuum state, so that the adjacent metal powder grains are burned into parts through adhesion and diffusion.

Vacuum magnetization is mainly suitable for magnetization of metal materials.

sort:

Vacuum furnace is a vacuum heat treatment furnace, according to the application of equipment to distinguish, probably includes the following categories:

Vacuum quenching furnace, vacuum brazing furnace, vacuum annealing furnace, vacuum magnetizing furnace, vacuum tempering furnace, vacuum sintering furnace, vacuum diffusion welding furnace, vacuum carburizing furnace, etc.

Vacuum furnaces are divided into vacuum resistance furnaces, vacuum induction furnaces, vacuum electric arc furnaces, vacuum consumable electric arc furnaces, electron beam furnaces (also known as electron bombardment furnaces) and plasma furnaces.

structure:

Vacuum furnace is generally composed of main engine, furnace, electric heating device, sealed furnace shell, vacuum system, power supply system, temperature control system and transport vehicle outside the furnace. The sealed furnace shell shall be welded with carbon steel or stainless steel, and the joint surface of the detachable parts shall be sealed with vacuum sealing material. In order to prevent the deformation of the furnace shell after heating and the deterioration of the sealing material after heating, the furnace shell is generally cooled by water or air cooling. The furnace is located in a sealed furnace shell. Depending on the purpose of the furnace, the furnace is equipped with different types of heating elements, such as resistors, induction coils, electrodes and electron guns. The furnace of the vacuum furnace for melting metal is equipped with a crucible, and some are equipped with an automatic pouring device and a manipulator for loading and unloading materials. The vacuum system is mainly composed of vacuum pump, vacuum valve and vacuum gauge.

Apply:

Vacuum furnaces appeared around the 1930s, and vacuum consumable electric arc furnaces were applied in industry in 1953.

1. High pressure high flow rate gas quenching vacuum furnace

It is mainly used for vacuum heat treatment of cold and hot die steel, high-speed steel, elastic alloy, superalloy, stainless steel, titanium alloy, magnetic materials and other materials.

2. double chamber high pressure gas quenching vacuum furnace

It is mainly used for high pressure gas quenching of cold and hot working die steel, high-speed steel, elastic alloy, superalloy, stainless steel, titanium alloy, magnetic materials and other materials, as well as vacuum sintering, vacuum brazing and other processes.

3. Double chamber oil quenching gas cooling vacuum furnace

It is mainly used for bright quenching of tool steel, die steel, bearing steel, spring steel and other materials.

4. Vacuum aluminum brazing furnace

It is mainly used for the vacuum welding of automobile radiator, air conditioning evaporator, condenser, intercooler, radar grid antenna, waveguide and various plate or tube type heat exchangers.

5. Vacuum high temperature brazing furnace

It is mainly used for vacuum brazing of stainless steel, superalloy, cemented carbide, non-ferrous metals and other materials.