炊鹏飞,董洪峰,景然,张锋刚,李江华

• 1:陕西理工大学材料科学与工程学院

摘要(Abstract)：

通过快速多重旋转碾压技术(FMRR)在奥氏体316L不锈钢表面制备纳米结构层,并对其进行不同温度的退火处理。采用X-射线衍射仪(XRD),透射电镜(TEM),扫描电镜(SEM)及电化学工作站对退火样品的微观结构及耐蚀性能进行了研究。结果表明:经FMRR处理60 min后,在不锈钢表面因塑性变形生成了α′马氏体相,其衍射峰的半高宽明显宽化,这是由于经过塑性变形后316L不锈钢晶粒细化和微观应变增加导致的;不锈钢表面也形成了约12 nm厚的等轴纳米晶,且晶粒呈随机取向。对样品退火处理后,α′马氏体的衍射峰强度随退火温度的增加而增强,这表明316L不锈钢的马氏体含量增加。退火后样品的晶粒尺寸有所增加,但仍为纳米级,而微观应变随退火温度增加而减少。与原始样品相比,纳米化的316L不锈钢耐蚀性明显降低,退火处理后耐蚀性进一步降低,300℃退火样品的耐蚀性最差,这是由于晶界数量、马氏体含量和残余应力共同作用所致。

关键词(KeyWords)： 316L不锈钢;表面纳米化;退火处理;耐腐蚀性能

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51701111);; 陕西省自然科学基础研究计划项目(2018JQ5170,2018JM5021);; 陕西省教育厅专项科学研究计划项目(19JK0184)

作者(Author): 炊鹏飞,董洪峰,景然,张锋刚,李江华

DOI: 10.13289/j.issn.1009-6264.2019-0231

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