Which materials are not suitable for heat treatment

Do you know what materials are not suitable for heat treatment in vacuum sintering furnace?

Vacuum sintering furnace is mainly used for processing metal materials. And many metal materials are processed and produced by high temperature. But what kind of metal material can't be heat treated in vacuum furnace? Don't you know whether vacuum furnace manufacturers know it? After all, vacuum furnace manufacturers, silicon nitride reaction furnace manufacturers, ultra-high vacuum high temperature sintering furnace manufacturers only focus on their own industry and ignore the understanding of this point!

Let's learn about it with the vacuum furnace manufacturer!

Theoretically, all metal materials of vacuum sintering furnace manufacturers can be heat treated in vacuum sintering furnace. However, due to the technical requirements, processing costs, difficulties in process realization and other reasons, some materials cannot be processed at high temperature, specifically the following materials (workpieces) are not suitable for heat treatment in vacuum furnace.

1. Materials sensitive to nitrogen at high temperature and easy to form harmful effects. In order to prevent the alloy elements from volatilizing at high temperature, the vacuum furnace is usually filled with high-purity nitrogen to maintain the partial pressure at high temperature, and usually filled with nitrogen to cool. Therefore, this material should not be treated by vacuum furnace.

2. Carbon steel. From the cost point of view, the price of carbon steel is relatively low, and the price of finished products is relatively low. Therefore, it is a waste to use the vacuum sintering furnace for treatment, unless there is no machining allowance for high-profit workpieces or workpieces, which is an expedient measure when the surface quality requirements are high.

3. Some materials (workpieces) adopt special technology. For example, in order to obtain good mechanical properties, some workpieces need bainite, which is usually realized by isothermal quenching, while vacuum sintering furnace is difficult to realize. Another example is T10 steel, which requires high hardness and low deformation. Generally speaking, it is realized by water quenching and oil cooling. Although the vacuum furnace can obtain high hardness by high pressure gas quenching, the cooling speed is faster and the deformation is larger when the temperature is lower than millisecond.