论文部分内容阅读
用膨胀法和高温激光共聚焦显微镜分别对CrNi3Si2MoVNb钢经淬火和碳再配分(Q&P,Quenching and Partitioning)工艺的相变及马氏体相变的组织不均匀性进行表征,讨论了组织不均匀性对Q&P工艺钢微观组织的影响。结果表明,CrNi3Si2MoVNb钢第一次淬火过程中先形成马氏体在某些区域的批次增加,将原奥氏体晶粒分割成尺寸不同的若干区域,尺寸较大的未转变奥氏体稳定性较差,最终淬火过程中容易发生马氏体转变成二次淬火马氏体,而尺寸较小的更易于成为残留奥氏体。
The phase transformation and martensite transformation of CrNi3Si2MoVNb steel during quenching and carbonization (Q & P) and Quenching and Partitioning (Q & P) process were characterized by means of dilatometry and high temperature confocal laser scanning microscopy. The effects of microstructure heterogeneity Impact on Microstructure of Q & P Process Steel. The results show that in the first quenching of CrNi3Si2MoVNb steel, martensite is first batch-increased in some areas, and the original austenite grains are divided into several areas with different sizes. The larger untransformed austenite is stabilized The property is poor, and the martensite is easily transformed into the secondary quenched martensite in the final quenching process, while the smaller size is more likely to be retained austenite.