Si、Mn复相耐磨铸钢复相热处理组织与性能研究

测定了以Ｓｉ、Ｍｎ为主合金化元素的耐铸钢的ＴＴＴ曲线，曲线存在明显的海湾，贝氏体转变区域较宽；根据ＴＴＴ曲线，研究分析了这种耐磨铸钢在不同工艺条件下等温淬火复相热处理后组织、性能；结果表明，等温淬火复相蝗所得 组织为板条状贝氏体铁素体和奥氏体、贝氏体铁素体间距随等温的升高而变宽，奥氏体量增我，其强度，硬度下降，塑韧性提高。

A Studyof Heat-treatment Structure and Properties of Silicon and Manganese Alloyed Anti-wearDiphase Cast Steel

This paper first tested the TTT curve of anti wear cast steel alloyed with silicon and manganese. The curve has apparent bay area and wide bainite transmission area. Then, the relation of isothermal heat treatment process, structure and mechanical properties of the cast steel was investigated, according to the TTT curve. The structure of heat treatment steel consists of lath bainite ferrite and austenite. The distance of bainite ferrite phase increases with the elevating of isothermal temperature, as well as the amount of austenite. The strength and hardness of the steel decrease, toughness and plasticity increase with the elevating of isothermal temperature.