摘要
利用金相、Ｘ射线、扫描电子显微镜等手段研究了Ｃｒ１２钢中残余奥氏体的形变诱发马氏体相变对耐磨性能的影响，探讨了强化机制．结果表明，Ｃｒ１２钢经１１５０℃淬火得到大量处于变塑状态的残余奥氏体，并在磨损过程中发生形变诱发马氏体相变，使表面硬度和耐磨性显著提高，超过常规的９８０℃淬火．残余奥氏体对耐磨性的强化，为逐层诱发马氏体的循环强化机制．
Influence of the deformation induced martensitic transformation of retained austenite on the wear resistance of Cr12 steel is studied by means of optical microscope,X-ray diffraction and SEM techniques. The experimental results showed that the large quantity of retained austenite in the state of TRIP obtained in Cr12 steel after quenched from 1150℃ cantransform into the deformation induced martensite during the wear process. It increases the surface hardness and wear resistance of Cr12 steel greatly,over that of normal quenching from 980℃. The retained austenite in the surface layer is induced into martensite gradually,thus the wear resistance is improved.
关键词
铬钢
耐磨性
残余奥氏体
相变
Chromium steel
Wear resistance
Retained austenite
Martensite
Phase transformation
