熔模铸造属于精密铸造,近几年来在机械工业上应用越来越多。一般小型精铸件形状都较复杂,有些部位不经机械加工就装配使用,因此,要求热处理后零件表面脱碳层少,变形量小,较重要的零件对机械性能还有要求。所以合理的热处理工艺是十分重要的。我厂精铸件热处理分两类:一类是一般零件,采用退火,其质量好坏主要考核脱碳层和变形量。第二类是较重要的零件采用退火加调质处理,其质量好坏不但要考核脱碳 Investment casting is precision casting, in recent years more and more applications in the machinery industry. General small casting parts are more complex shapes, some parts of the assembly without the use of mechanical processing, therefore, requires decarburization after the heat treatment of parts surface less, less deformation, the more important parts of the mechanical performance requirements. So a reasonable heat treatment process is very important. I plant castings heat treatment is divided into two categories: one is the general part, the use of annealing, the quality of the main test decarbonization layer and the amount of deformation. The second category is more important parts using annealing plus quenching and tempering, the quality of not only to test decarbonization