Abstract : the structure and the properties of the grinding ball made of the composite cast iron have been researched in this paper . the result indicates that added trace boron and a proper quantity copper to this kind of composite cast iron can increase its quench - hardening ability , and raise its hardness and impact toughness 文摘:研究了一種復(fù)合鑄鐵磨球的組織和性能,結(jié)果表明,化學(xué)成分和淬火工藝對這種復(fù)合鑄鐵磨球的組織和性能有很大影響,微量的硼和適量的銅可以明顯地提高磨球的淬透性,經(jīng)過余熱淬火得到貝氏體或馬氏體基體組織,從而提高磨球的硬度和沖擊韌性。