陈珮琳,赵艳君,李平珍,温威莹,叶伯溪,韦凤

• 1:广西大学资源环境与材料学院
• 2:广西大学广西有色金属及特色材料加工重点实验室

摘要(Abstract)：

采用扫描电镜、能谱仪、X射线衍射和拉伸试验等研究了316L不锈钢在550～800℃氧化不同时间后的形貌、元素分布及高温拉伸性能。结果表明：316L不锈钢在550～750℃空气中氧化时Cr与Mn优先被氧化，在基体表面形成保护性的Cr_2O_3层和少量的Mn_3O_4氧化物。Mo和Si扩散速率较慢，富集于奥氏体基体和Cr_2O_3层之间。800℃下Cr_2O_3层局部出现裂纹，氧气穿过裂缝与Si和Mo反应生成的SiO_2和NiMoO_4对合金的抗氧化起到积极的作用。氧化温度在600～800℃时，316L不锈钢的抗拉强度随着温度的升高而下降，伸长率随着温度的升高而增大。此外，随温度的升高，316L不锈钢的拉伸断口处Mo与Si元素大量减少，使得其抗拉强度降低，塑性和韧性得到改善。

关键词(KeyWords)： 316L不锈钢;高温氧化;高温力学性能

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51661004);; 广西创新驱动项目(桂科AA18242003-3);; 广西有色金属及特色材料加工重点实验室项目(GXYSSF1809)

作者(Author): 陈珮琳,赵艳君,李平珍,温威莹,叶伯溪,韦凤

DOI: 10.13289/j.issn.1009-6264.2022-0216

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