Page 63 - 《摩擦学学报》2020年第6期

第 40 卷 第 6 期 摩 擦 学 学 报 Vol 40 No 6
2020 年 11 月 Tribology Nov, 2020

DOI: 10.16078/j.tribology.2020037

表面机械滚压处理(SMRT)316L不锈钢梯度

纳米层在腐蚀介质下的摩擦学行为研究

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沈明学 , 容康杰 , 刘德佳 , 熊光耀 , 李春红 , 王效贵 2*
(1. 华东交通大学 材料科学与工程学院，江西 南昌 330013;
2. 浙江工业大学 机械工程学院，浙江 杭州 310032)
摘 要: 采用表面机械滚压处理(surface mechanical rolling treatment，SMRT)技术在316L奥氏体不锈钢表面构筑了梯
度纳米结构层. 利用透射电子显微镜(TEM)和纳米压痕仪等分析其微观组织、力学性能等基础上，重点探讨了
SMRT前后316L在1 mol/L HCl溶液(以纯水环境作为对比组)中的摩擦学行为. 结果表明：经SMRT加工后316L表面
梯度纳米晶层厚度达200 μm以上，表面硬化层厚度超过1.5 mm，表面硬度提升至基体近2倍；SMRT大大减缓了材料
磨损，与基体试样相比，SMRT试样在腐蚀介质下减摩效果比纯水环境更明显，且在腐蚀环境下表现出优异的耐腐
蚀性能，其磨损机制由处理前伴随严重剥落特征的疲劳磨损和磨粒磨损转变为轻微疲劳磨损. 因此，316L不锈钢机
械滚压梯度纳米层在腐蚀服役环境下具有较高的潜在工程应用价值.
关键词: 表面机械滚压处理; 腐蚀磨损; 摩擦学行为; 梯度纳米化结构; 316L不锈钢
中图分类号: TH117.3; TG375 文献标志码: A 文章编号: 1004-0595(2020)06–0746–08

Tribological Behavior of Nanocrystalline Layer on 316L Stainless
Steel Subjected to Surface Mechanical Rolling Treatment

under Corrosion Environment

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SHEN Mingxue , RONG Kangjie , LIU Dejia , XIONG Guangyao , LI Chunhong , WANG Xiaogui 2*
(1. College of Materials Science &Engineering, East China Jiaotong University, Jiangxi Nanchang 330013, China
2. Zhejiang University of Technology, College of Mechanical Engineering, Zhejiang Hangzhou 310032, China)
Abstract: A gradient nanostructured layer was fabricated on 316L austenitic stainless steel by means of surface
mechanical rolling treatment (SMRT) technology. The microstructure and mechanical properties of the surface layer
were studied by transmission electron microscopy, nanoindentation tester. And on this basis, this article focused on the
tribological behavior of 316L before and after SMRT in 1 mol/L HCl solution, and the pure water environment was
taken as the reference group. The results showed that, a gradient nanocrystalline layer with a thickness of 200 μm was
formed after SMRT processing. The surface hardening layer exceeded 1.5 mm in thickness. The surface microhardness
of surface hardening layer was twice as much as that of the base metal. The surface subjected to SMRT greatly alleviated
wear. Compared with the base metal, SMRT surface was effective in reducing friction under the corrosive medium than
that under the pure water environment, and it exhibited excellent corrosion resistance. The wear mechanisms varied from
abrasive wear and fatigue wear accompanied by severe delamination before treatment to mild fatigue wear. Therefore,
the nanostructured layer of 316L subjected to SMRT is a good candidate for application.

Received 10 March 2020, revised 5 June 2020, accepted 9 June 2020, available online 28 November 2020.
*Corresponding author. E-mail: hpcwxg@zjut.edu.cn, Tel: +86-571-88320293.
The project was supported by the National Natural Science Foundation of China (51775503) and the Natural Science Foundation of
Jiangxi Province (20192BAB206026, 20171BCD40009).
国家自然科学基金项目(51775503)和江西省自然科学基金项目(20192BAB206026, 20171BCD40009)资助.