粒化处理对新型高碳高铬低镍钢组织与力学性能的影响

Influence of granulation on microstructure and mechanical properties of new-type high carbon high chromium and low nickel steel

通过研究粒化处理工艺对新型高碳高铬低镍钢的铸态组织和力学性能的影响,表明了经粒化处理后,奥氏体基体晶粒明显细化,且晶粒内弥散析出大量细小的粒状或短杆二次碳化物;原连续网状碳化物明显溶断并粒化,变为断续的网状物,且碳化物数量增大。粒化处理后钢的硬度显著提高、韧性略有改善。

Influences of granulation process on the ndcrostmcture and the mechanical properties of new-type high carbon high chromium and low nickel steel were investigated. The results showed： after granulation, the grain of matrix austenite refined obviously, and massive small .granular or short-reded secondary carbide was precipitated in matrix austenite, original connected network carbide remarkably disconnected and granulated to become into discontinuous network, and the amount of carbide increased. After granulation, the steel hardness increased significantly and the toughness improved slightly.