铬含量对热作模具钢热处理工艺及热稳定性的影响Effect of Cr content on heat treatment process and thermal-stability of hot work steel
朱姣,马党参,周健,陈再枝,项金钟,迟宏宵
摘要(Abstract):
利用OM,SEM和TEM及ThermoCalc(TCFE 3数据库)热力学计算等方法,结合热稳定性试验数据,研究了两种不同铬含量的热作模具钢4Cr3SiWMoVNb钢和4Cr5SiWMoVNb钢的热稳定性能。结果表明:4Cr3SiWMoVNb钢和4Cr5SiWMoVNb钢的最佳淬火温度分别为1000℃和1030℃;回火温度高于600℃后,4Cr3SiWMoVNb钢表现出更好的回火抗性;随回火时间的延长,两钢的硬度均呈下降趋势,4Cr5SiWMoVNb钢中有较多的以含Cr为主的M23C6碳化物粗化长大,组织较快发生回复与再结晶,硬度下降较快,而4Cr3SiWMoVNb钢热稳定性相对优异。
关键词(KeyWords): 热作模具钢;热处理;热稳定性;碳化物;组织演变
基金项目(Foundation):
作者(Author): 朱姣,马党参,周健,陈再枝,项金钟,迟宏宵
DOI: 10.13289/j.issn.1009-6264.2013.10.023
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