“低应力灰铸铁的研究”课题1981年列入机械部重点科研项目,1983年列为国家38项重点科技攻关项目内容之一,同时也是北京市的科研项目。 低应力灰铸铁从1981年起经过大量系统的试验室试验研究,大量的生产试验验证,和全面投产使用,其结果证实了通过适当调正灰铸铁的化学成分(Si/C比值等)。并辅以恰当的孕育处理或必要的微量合金化处理,可以获得具有良好综合性能的优质孕育铸 “Low stress gray cast iron research” project included in 1981, the Ministry of Machinery key scientific research projects in 1983 as a national 38 key scientific and technological projects, but also Beijing’s research projects. Low-stress gray cast iron has undergone a large number of systematic laboratory tests since 1981, a large number of production test verification, and full commissioning. The results confirm that the chemical composition (Si / C ratio, etc.) of gray cast iron can be properly adjusted. Supplemented by proper gestation treatment or the necessary micro-alloying treatment, you can get a good combination of good quality pregnancy and childbirth