Casting of heat treatment is very important, so when we were in control precision casting heat treatment should be careful.Precision casting due to different purposes, heat treatment, basic can be mainly divided into two categories, the first category is the organization structure will not change or by heat treatment and should not be changed, the second is the basic organizational structure change.The first heat treatment procedure, is mainly used to eliminate internal stress, and the internal stress is in the process of stainless steel casting due to different cooling condition and conditions.Organization, strength and other mechanical properties, no obvious changes due to heat treatment.