采用双相区保温淬火配分工艺对低碳硅锰钢进行处理,通过场发射扫描电镜、X射线衍射仪和拉伸实验等对该Q&P钢增塑机制及其组织性能进行研究.结果表明:实验用钢经双相区保温淬火配分处理后,综合力学性能优于传统Q&P钢;双相区合理的保温时间可以减少室温组织中二次淬火马氏体含量,以保证更好的塑性;实验用钢经Q&P工艺处理后室温残余奥氏体含量为4.9％,而经双相区保温-淬火-配分处理时,随着双相区保温时间的延长,室温残余奥氏体含量呈先增加后减少的趋势,在双相区720℃保温1500s再经Q&P处理后残余奥氏体含量达到最大值7.3％,综合力学性能最佳.
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