Eliminate the strain hardening obtain satisfactory microstructure

Bright annealing furnace is mainly used for stainless steel product heat treatment under protective atmosphere. When using the performance requirements are different, is different to the requirement of microstructure after bright annealing, bright heat treatment process is also different.

The 300 series typical austenitic stainless steel heat treatment process is solid solution treatment. Carbide into the austenite in the process of heating, heating to 1050 ~ 1150 ℃, the appropriate insulation for a short time, dissolve the carbide in austenite, and then quickly cooled to below 350 ℃, get a supersaturated solid solution namely uniform ChanXiangAo austenite organization. The heat treatment process is the key to rapid cooling, cooling speed to 55 ℃ / s, rapidly by carbide after solid solution and precipitation temperature (550 ~ 850 ℃). Try to short time of heat preservation, otherwise coarse grains, affect the surface finish.