回火温度对高铬复合锤头组织和性能的影响

摘要

Effects of tempering temperature on microstructure and properties of high-chromium iron composite hammer is studied by optical microscope ,rockwell hardness ,micro hardness tester and charpy impact test machine. The results show that,after tempering treatment at 250℃,the microstructure is Cr7C3 and martensite and little residual austenite ,the rockwell hardness and toughness are improved ,composite interface, wear and impact resistance increases.%采用金相显微镜、洛氏硬度计、显微硬度计和摆锤式冲击实验机等试验手段，研究了回火温度对高铬复合锤头组织和性能的影响。结果表明，经250℃回火处理后，该高铬复合锤头的组织为Cr7C3共晶碳化物+马氏体+少量残余奥氏体，洛氏硬度和冲击韧性较好，复合界面良好，具有较高的耐磨性和抗冲击性能。