冲击强化对304奥氏体不锈钢拉伸性能的影响  

Influence of Impact Enhancements on Tensile Property of 304 Austenite Steel

作　　者：高玉魁[1] 

机构地区：[1]同济大学航空航天与力学学院,上海200092

出　　处：《材料工程》2014年第8期36-40,共5页Journal of Materials Engineering

基　　金：国家自然科学基金资助项目(11372226);中央高校基本业务费专项资金1330219133;同济大学英才计划资助项目(13302380043);国家冷轧板带装备及工艺工程技术研究中心开放课题资助项目(NECSR-201306);国家重点基础研究发展计划资助项目(2010CB833105)

摘　　要：选用304奥氏体不锈钢进行喷丸强化和表面机械研磨等硬球冲击强化。采用X射线衍射和透射电子显微分析技术测定304奥氏体不锈钢冲击强化形成的微观组织结构变化,并进行室温下的拉伸实验,研究冲击强化对微观组织与拉伸性能的影响。结果表明:冲击强化导致奥氏体转变为马氏体,而且表层晶粒明显细化,这提高了屈服强度和抗拉强度等拉伸性能。304 austenite stainless steel was shot peened （SP） and surface mechanical attrition treated （SMAT）. Microstructure changes caused by impact enhancements were determined by X-ray diffrac- tion and transmission electron microscopy. Moreover, the effect of impact enhancements on the micro- structure and tensile property was studied. The results show that austenite transforms to martensite induced by impact at the surface enhanced layer and that fine grains are formed in the severe plastic de- formed surface layer. These changes increase yield strength and tensile strength.

关 键 词：喷丸强化 表面机械研磨 相变 

分 类 号：TG156[金属学及工艺—热处理]