课题主要研究了高碳当量灰铸铁具有良好的机械性能、铸造性能和切削加工性能的有关技术和原理。通过实验室和北京人民机器厂试验和批量生产验证,证明该技术可以使灰铸铁获得优良的综合性能。经过生产3500t铸件的生产考验,表明技术上是成熟的。各项性能指标,包括强度、硬度、硬度均匀性、白口倾向性、加工切削性能。残留应力倾向、刚度性能 The subject mainly studied the relevant technologies and principles of high carbon equivalent gray cast iron with good mechanical properties, casting properties and cutting performance. Through the laboratory and Beijing People’s Machinery Factory test and mass production verification, the technology can prove that gray cast iron can get excellent overall performance. After the production of 3500t castings test, that is technically mature. The performance indicators, including strength, hardness, hardness uniformity, white tendency, cutting performance. Residual stress tendencies, stiffness properties