轧制工艺对316L不锈钢组织和耐蚀性能的影响  

Effect of rolling process on microstructure and corrosion behavior of 316L stainless steel

作　　者：虞海燕[1] 张洋[1] 吕爱强[1] 刘春明[1] 

机构地区：[1]东北大学材料与冶金学院,沈阳110004

出　　处：《材料科学与工艺》2010年第2期202-205,共4页Materials Science and Technology

基　　金：辽宁省科技攻关计划项目(2007221007);教育部跨世纪优秀人才计划项目(2002594);长江学者和创新团队发展计划资助项目(IRT0713)

摘　　要：为探索改善不锈钢耐腐蚀性能的途径,对316L不锈钢施加相同变形量的同步轧制和异步轧制,利用X射线衍射、透射电镜观察、电化学测量和扫描电镜表面观察研究了轧制工艺对钢的显微组织和腐蚀性能的影响.结果表明,经过异步轧制后显微组织中出现大量孪晶界,优化了晶界结构,在酸性介质中的晶间腐蚀敏感性明显减轻;而经过同步轧制后,样品呈现出高位错密度的显微组织,在酸性介质中的耐腐蚀性能降低.异步轧制后耐蚀性能得到改善是由于大量孪晶界的形成优化了晶界结构.In order to explore the way to improve the corrosion resistance of stainless steel,316L stainless steel was treated with cross shear rolling and synchronization rolling with the same deformation amount. The effect of rolling process on microstructure and corrosion behavior of the steel was investigated by XRD,TEM, electrochemical measurement and SEM of corroded surface. The results show that the microstructure consists of numbers of mechanical twins and the susceptibility to intergranular corrosion in acidic solution is obviously alleviated after cross shear rolling. However,in the steel subjected to synchronization rolling,the microstructure exhibits high density dislocation and the corrosion resistance is reduced. The improvement of corrosion resistance after cross shear rolling should be attributed to the optimization of the grain-boundary structure caused by the formation of numbers of mechanical twins.

关 键 词：316L不锈钢 异步轧制 同步轧制 机械孪晶 腐蚀性能 

分 类 号：TG335.58[金属学及工艺—金属压力加工]