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The difference between vacuum heat treatment and ordinary heat treatment

Gary young 2023-12-13 09:36:53

1, the concept of vacuum heat treatment and ordinary heat treatment
Vacuum heat treatment refers to heat treatment carried out under vacuum or low air pressure conditions, while ordinary heat treatment refers to heat treatment carried out in an atmospheric pressure environment. The biggest difference between the two is the atmosphere during the treatment.

 


2. The temperature of vacuum heat treatment and ordinary heat treatment
Vacuum heat treatment can be carried out at very high temperatures because no gases such as oxygen react with the material to be treated during the treatment. In contrast, ordinary heat treatment requires controlled treatment temperatures to prevent the material to be treated from reacting with gases such as oxygen and causing adverse effects.


3. The pressure of vacuum heat treatment and ordinary heat treatment
Vacuum heat treatment needs to be operated under vacuum or low air pressure, and a good vacuum or low air pressure environment needs to be maintained during the treatment process. Ordinary heat treatment can be carried out at room temperature and pressure.


4, the atmosphere of vacuum heat treatment and ordinary heat treatment
One of the biggest features of vacuum heat treatment is the lack of atmosphere during the process. This means that there is no exchange of oxygen and other gases between the material to be treated and the treatment vessel, thus avoiding oxidation reactions on the surface of the material. In contrast, ordinary heat treatment needs to be carried out in a specific redox atmosphere to guarantee the quality of the material.


5. The cooling rate of vacuum heat treatment and ordinary heat treatment
Vacuum heat treatment generally uses rapid cooling to achieve the ideal tissue structure. In contrast, ordinary heat treatment requires a slower cooling rate to avoid adverse reactions to the material to be treated.


6. Summary
In short, vacuum heat treatment and ordinary heat treatment are very different in terms of temperature, pressure, atmosphere, cooling rate, etc. The exact method used depends on the type of material to be treated, the purpose for which it is used, and the requirements after treatment.