浇注温度与熔模铸件裂纹

Effect of Pouring Temperature on Investment Casting Crack

铸件产生裂纹,一般认为浇注系统设计不当,忽视了浇注温度的影响。本文根据实践经验,指出浇注温度不适当——过高或过低,都将产生裂纹,论述当前工艺规程中对浇注温度规定的不切实际之处和操作上的随意性。

It is generally thought that investment casting crack is caused by gating system. but the effect of pouring temperature is ofen neglected. Based on the practical experience. the present paper points out that improper pouring temperature (too high or too low) will result in generating crack,and also describes that pouring temperature specified in existing technological process is partly unpractical and that the operation is not regular.