一种高强度、高稳定性铸铁的研究及应用

Research on the Cast Iron with High Strength and Stability and Its Application

试验采用高 Ｓｉ／ Ｃ 比、 Ｍｏ 与 Ｃｕ 低合金化、强化孕育等工艺方法，生产低应力高强度铸铁，并用静态弯曲和开口环测应力法，对普通铸铁和高强度铸铁的弹性模量、应力松弛性能进行了对比试验。结果表明，高 Ｓｉ／ Ｃ 比、低合金化的高强度铸铁，能够满足大型精密仪器薄壁基础铸件的高刚度、高稳定性要求。

This article introduces the test of producing the cast iron with low stress and high strength by adopting such techniques as high Si/C proportion, Mo and Cu low alloy treatment and enforcing treatment process. In the meantime, the elasticity modulus and stress failure property of ordinary cast iron are tested against those of the cast iron with high stress on the motionless flexure and opening loop equipment. The results show that high strength cast iron with high Si/C proportion, Mo and Cu low alloy treatment can meet the requirements to the hight rigidity and high stability of the thin wall basic casting of a large fine instrument.