稀土变质剂对高铬铸铁锤头组织和耐磨性能的影响  

Influence of RE Modification on the Hardness and Wear Resistance of High-Chromium Cast Iron Hammerhead

作　　者：汤帅[1] 斯庭智[1] 张庆安[1] 

机构地区：[1]安徽工业大学材料科学与工程学院,安徽马鞍山243002

出　　处：《安徽工业大学学报（自然科学版）》2009年第1期32-34,38,共4页Journal of Anhui University of Technology（Natural Science）

摘　　要：探讨在相同试验条件下,稀土变质剂加入量对高铬铸铁锤头组织、硬度和耐磨性的影响。结果表明,加入稀土变质剂能细化组织,铸态锤头的碳化物由鱼骨状转变为块状,热处理态锤头的碳化物由条状转变为颗粒状。加入稀土变质剂能提高锤头的硬度和耐磨性,当加入量高于0.3%(质量分数)时硬度和耐磨性提高的程度减小。The influences of RE modification on the microstructure, hardness and wear resistance of highchromium cast iron hammerhead were investigated. The results showed that the microstructure of high-chromium cast iron was refined by the addition of RE modification. The shape of the carbides of as-casted hammerhead changed from fish-bone to bulk, while that of the heat-treated hammerhead changed from strip to particle. The hardness and wear resistance of high-chromium cast iron were both improved by the addition of the RE modification. However, the increase degree reduced when the addition content is higher than 0.3% （weight fraction）.

关 键 词：高铬铸铁 稀土变质剂 显微组织 硬度 耐磨性 

分 类 号：TF325.2[冶金工程—冶金机械及自动化]