铸造无碳化物贝氏体耐磨钢研究和应用.pdf

学兔兔 铸 造 Apr．zu1·1 · 382· FOUNDRY VoI．6O NO．4 铸造无碳化物贝氏体耐磨钢的研究与应用 程巨强，刘志学 (西安工业大学材抖与化工学院，陕西西安710032) 摘要：介绍了无碳化物贝氏体耐磨铸钢的合金化设计，研究了铸造无碳化物贝氏体耐磨钢热处理的组织和性能。铸造 无碳化物耐磨钢正火低温回火热处理组织由贝氏体铁素体和奥氏体组成，属于非典型贝氏体或无碳化物贝氏体或奥氏 体-贝氏体复相组织，淬火低温回火热处理组织由马氏体和残余奥氏体组成，属于马氏体 奥氏体复相组织。结果表明： 铸造无碳化物贝氏体耐磨钢正火或淬火后低温回火，材料具有高的强度、高的韧性和高的耐磨性，低碳铸造无碳化物 贝氏体耐磨钢具有良好的焊接性能。并介绍了铸造无碳化物贝氏体耐磨钢在矿山机械方面的应用。 关键词：无碳化物贝氏体耐磨铸钢；合金化；组织；性能；应用 中图分类号：TG143．7 文献标识码：A 文章编号：1001—4977(2011)04—0382—04 Research and Application of Carbon Free Bainite Wear Resista nt Cast Steel CHENG Ju-qiang，LIU Zhi—xue (Department of Materials Science and Chemical Engineering，Xi’an Institute of Technology， Xi’an 71 0032，Shaanxi，China) Abstract：Alloying design of carbon—free bainite wear resistanl cast stee1 was presented and lhe microstructure and properties of the steeI after heat treatment were studied．The microstructure of carbon-free bainite wear resistant cast steeI consists of bainite．ferrite and residual austenite after normalization and IOW temperature tempering，it belongs to non-typical bainite．carbon．free bainite or austenjte—bajnjte mixed microstructure．Wbile．the microstructure of carbon．free bainite wear resistant cast steeI consists of martensite and residuaI austenite after quenching and IOW temperature tempering and it belongs to martensite-austenite mixed micrOstructure．The results show that the carbon-free bainit