【摘要】 研究了亚临界处理温度和保温时间对高铬白口铸铁组织转变、硬度和耐磨性的影响 ,研究表明 ,铸态组织中含有大量残留奥氏体的高铬白口铸铁 ,在 5 0 0～ 6 5 0℃之间进行热处理 ,其中的残留奥氏体在冷却到室温的过程中会转变成马氏体而造成高铬铸铁硬度升高。在适当的处理温度和保温时间下 ,高铬白口铸铁能得到最高的硬度 ,温度过高或保温时间过长都会导致其硬度下降。磨损试验结果表明 ,通过亚临界热处理高铬白口铸铁的耐磨性可以得到一定的改善更多还原

【Abstract】 The effect of subcritical treating temperature and time on microstructure, hardness and wear resistance of a high chromium white cast iron which has a great amount of the retained austenite is studied.The results show that,the retained austenite can transform into martensite in cooling to room temperature after heat treated at 500～600℃ leading the increase of hardness of the high chromium white cast iron. After subcritical treating at suitable temperature and time, the high chromium white cast iron can get the most high hardness.Wear test results show that the subcritical treatment can increase wear resistance of the high chromium white cast iron.更多还原