Prospects of Heat Treatment Process in Vacuum Furnace

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What is vacuum heat treatment processing technology?

Refers to a new type of heat treatment technology that combines vacuum technology and heat treatment technology. Among them, the vacuum environment in which vacuum heat treatment is located refers to an atmosphere environment below one atmosphere, including low vacuum, medium vacuum, high vacuum and ultra-high vacuum, etc. Therefore, vacuum heat treatment actually belongs to atmosphere controlled heat treatment. @GEHANG Vacuum Furnace

Vacuum heat treatment means that all and part of the heat treatment process is carried out in a vacuum state. Vacuum heat treatment can realize almost all heat treatment processes that can be involved in conventional heat treatment, but the quality of heat treatment is greatly improved.

Compared with conventional heat treatment, vacuum heat treatment processing technology can achieve no oxidation, no decarburization, and no carburization at the same time. It can remove phosphorous chips on the surface of the workpiece, and has the functions of degreasing and degassing, so as to achieve the effect of surface bright purification.

Characteristics of vacuum heat treatment processing technology

1) Superiority of vacuum heat treatment processing

Vacuum heat treatment processing is a non-oxidation heat treatment technology with a wide range of applications that keeps pace with the controllable atmosphere, and it is also one of the main signs of the advanced degree of current heat treatment production technology. Vacuum heat treatment can not only achieve no oxidation and no decarburization of steel parts, but also achieve no pollution in production and less distortion of work-pieces. Therefore, it also belongs to the category of clean and precise production technology. At present, it has become an irreplaceable advanced technology in the production of molds.

2) Small distortion of the workpiece in the vacuum heat treatment process

According to domestic and foreign experience, the amount of distortion of workpiece vacuum heat treatment is only one third of that of salt bath heating and quenching. It is of great significance to study the vacuum heating methods of various materials and parts with different levels of complexity and the distortion laws under various cooling conditions, and to simulate them with a computer, which is of great significance for the promotion of vacuum heat treatment technology. During vacuum heating, atmospheric pressure or high-pressure air cooling, the uniformity of airflow has a great influence on the hardening effect and quality dispersion of parts. The use of computer simulation methods to study the law of air circulation in the furnace is of great significance for improving the structure of the furnace.

3) Vacuum heat treatment furnace

Modern vacuum heat treatment furnace refers to a cold-wall furnace that can perform vacuum heating of components, and then quench in oil or in atmospheric pressure and pressurized gas. The research and development of this type of equipment is a comprehensive, interdisciplinary work involving many scientific and technological fields. In the field of tool and mold materials, the application prospect of vacuum heat treatment is great. Most tool and die steels are currently heated in a vacuum, and then cooled and quenched in a gas. In order to obtain satisfactory mechanical properties on the surface and inside of the workpiece, vacuum high-pressure gas quenching technology must be used.

At present, the air pressure of vacuum gas quenching has increased from 0.2MPa and 0.6MPa to 1-2MPa or even 3MPa in the world. Therefore, the gradual increase of the cooling gas pressure of the high-pressure gas quenching vacuum furnace is an important development trend.

The SIMUWU brand high-pressure gas quenching furnace RVGQ series has been widely used in the heat treatment of die steel, high-speed steel, cemented carbide, and refractory metal alloys. At present, RVGQ series products have been sold all over the world, including vacuum heat treatment furnaces in Russia, vacuum furnaces in India, vacuum heat treatment equipment in Pakistan, vacuum furnaces in Thailand, sintering furnaces in Vietnam, vacuum heat treatment equipment in Malaysia, vacuum sintering furnaces in the United States, vacuum brazing furnaces in Turkey, and Sweden High-temperature vacuum furnace, Saudi vacuum furnace, Iran vacuum brazing furnace, German vacuum furnace, Italian vacuum sintering furnace, French vacuum furnace, etc.