高碳当量高强度灰铸铁的生产应用

Commercial Practice of producing High Strength Gray Iron Casting with High CE Melts

一、前言众所周知,低碳当量灰铸铁可获得较高的机械强度,然而这种友铸铁的铸造性能较差、易产生缩孔、缩松等缺陷。高碳当量灰铸铁具有良好的铸造性能,但由于石墨粗大及石墨量的增多导致对基体缩减及割裂作用增大,从而使机械性能下降。如何解决在高碳当量条件下提高强度的问题是机械工业目前的一个重要研究课题。高碳当量高强度的理论研究在国内已有了较大的发展。

Synopsis: High strength gray iron castings have been produced with high CE melts by controlling content of Mn and Si in melts and inoculating rationally. Castabilities of the casting are remarkably improved. Casting defects, such as cracking, blister, slag and porosity are much lower now.