The heat treatment processing factory lists the characteristics of vacuum heat treatment processing technology
2021/1/22 3910
For vacuum heat treatment, the heat treatment processing factory - Xinguang Heat Treatment states that when heating in a vacuum state, the surface elements of metal workpieces will undergo evaporation. The vacuum degree required for metal to complete non-oxidation heating, surface purification effect, achieving minimal oxidation and minimal shedding. Next, what we mainly want to talk to you about is the principle of vacuum heat treatment technology and the related characteristics of processing skills.
The technological principle of vacuum heat treatment processing technology
By taking advantage of the phase transformation characteristics of metals in a vacuum state, the thermodynamics and kinetics of solid-state phase transitions do not change much within a vacuum range of only 0.1MPa difference from atmospheric pressure. When formulating the vacuum heat treatment process regulations, it is possible to refer to the data of various types of microstructure changes under normal pressure based on the principle of solid-state phase transformation at normal pressure. Meanwhile, under the effect of vacuum degassing, the physical and mechanical properties of metal materials can be enhanced. When heated in a vacuum state, the surface elements of metal workpieces will undergo evaporation. The vacuum degree required for metal to complete non-oxidation heating, surface purification effect, achieving minimal oxidation and minimal shedding.
The heat treatment processing factory mentioned that the characteristics of vacuum heat treatment processing technology are as follows:
The superiority of vacuum heat treatment processing
Vacuum heat treatment processing is a widely used non-oxidizing heat treatment technology on par with controlled atmosphere, and it is also one of the primary indicators of the current level of heat treatment production technology. Vacuum heat treatment not only enables steel parts to be free from oxidation and decarburization, but also ensures pollution-free production and minimal distortion of the workpieces. Therefore, it also falls within the category of clean and precise production technologies. At present, it has become an irreplaceable technology in the production of tools and dies.
(2) The vacuum heat treatment process results in less distortion of the workpiece
According to domestic and international experience, the distortion of workpieces during vacuum heat treatment is only one third of that during salt bath heating quenching. It is of great significance for promoting vacuum heat treatment technology to study the vacuum heating methods of various materials and parts with different degrees of complexity, as well as the distortion rules under various cooling conditions, and to simulate them with computers. When vacuum heating, atmospheric pressure or high-pressure gas cooling quenching is carried out, the uniformity of the gas flow has a significant impact on the hardening effect and quality dispersion of the parts. The study of the gas flow circulation rules in the furnace by using computer simulation methods is of great significance for improving the furnace structure.
(3) Select a vacuum heat treatment furnace
Modern vacuum heat treatment furnaces refer to cold-wall furnaces that can perform vacuum heating of components and then quenched them in oil or in atmospheric and pressurized gases. The research and development of this type of equipment is a highly comprehensive, interdisciplinary task involving many technological fields.
The application prospects of vacuum heat treatment for tool and die materials are very promising. The heat treatment processing plant mentioned that most tool and die steels currently adopt the method of heating in a vacuum and then cooling and quenching in a gas. In order to achieve satisfactory mechanical properties both on the surface and inside of the workpiece, vacuum high-pressure gas quenching technology must be adopted. At present, the gas pressure for vacuum quenching in the world has increased from 0.2MPa and 0.6MPa to 1-2 mpa or even 3MPa. Therefore, the gradual increase in the cooling gas pressure of high-pressure vacuum quenching furnaces is an important development trend.
The above is what the heat treatment processing factory - Xinguang Heat Treatment has sorted out and released for everyone. Xinguang Heat Treatment Industry (Kunshan) Co., Ltd. is a professional heat treatment processing manufacturer, providing metal heat treatment, vacuum heat treatment, and mesh belt furnace heat treatment. We offer service and brand guarantees. Welcome to consult!