316L不锈钢离子渗氮/PVD复合改性层的组织与性能

doi:10.13251/j.issn.0254-6051.2025.01.046

金属热处理 ›› 2025, Vol. 50 ›› Issue (1): 299-307.DOI: 10.13251/j.issn.0254-6051.2025.01.046

316L不锈钢离子渗氮/PVD复合改性层的组织与性能

曹驰^1,2, 张翔¹, 陈志林², 陈东升¹, 张琢¹

1.兰州理工大学材料科学与工程学院, 甘肃兰州 730050;
2.兰州理工大学温州泵阀工程研究院, 浙江温州 325105

收稿日期:2024-07-22 修回日期:2024-11-06 出版日期:2025-01-25 发布日期:2025-03-12
作者简介:曹驰(1969—),男,高级工程师,博士,主要研究方向为金属材料表面强化和模具设计制造技术,E-mail:caochichi@lut.edu.cn
基金资助:
甘肃省科技计划项目(20YF8GA058);温州市工业科技项目(ZG20211003)

Microstructure and properties of ion nitriding/PVD composite modified layer on 316L stainless steel

Cao Chi^1,2, Zhang Xiang¹, Chen Zhilin², Chen Dongsheng¹, Zhang Zhuo¹

1. School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou Gansu 730050, China;
2. Wenzhou Research Institute of Pump and Valve, Lanzhou University of Technology, Wenzhou Zhejiang 325105, China

Received:2024-07-22 Revised:2024-11-06 Online:2025-01-25 Published:2025-03-12

摘要/Abstract

摘要： 为了提高不锈钢表面硬度、耐磨性和耐蚀性能,研究了单一离子渗氮和离子渗氮/物理气相沉积(PVD)复合处理工艺对316L奥氏体不锈钢组织、硬度、摩擦磨损及耐蚀性能的影响。结果表明,经单一离子渗氮处理的试样表面形成厚度约20 μm、硬度约802 HV0.05的高氮硬化层;经渗氮/PVD复合处理的试样表面形成厚度约25 μm、纳米硬度约29 GPa的改性层;两种工艺均形成了γ_N相,渗氮/PVD复合处理的试样表面形成的非晶薄膜未对中间层物相造成影响。与基体相比,单一渗氮试样在干摩擦和腐蚀摩擦工况下的摩擦因数分别降低至0.520和0.311;经渗氮/PVD复合处理试样则降低至0.074和0.119;单一渗氮试样和渗氮/PVD复合处理试样自腐蚀电流密度由4.602×10^-8 A/cm²分别降低至4.084×10^-8 A/cm²和3.318×10^-8 A/cm²,自腐蚀电位由-0.213 V分别升高至-0.195 V和-0.182 V。综合比较,渗氮/PVD复合处理可以显著提高316L奥氏体不锈钢的表面硬度、耐磨性及耐蚀性。

关键词: 316L不锈钢, 离子渗氮, 物理气相沉积, 组织, 硬度, 耐磨性, 耐蚀性

Abstract: To improve the surface hardness, wear resistance, and corrosion resistance of stainless steel, the effects of single ion nitriding and ion nitriding/physical vapor deposition (PVD) composite treatments on the microstructure, hardness and tribological and corrosion properties of 316L austenitic stainless steel were studied. The results show that the specimen treated by single ion nitriding forms a high-nitrogen hardened layer with a thickness of about 20 μm and hardness of about 802 HV0.05. The specimen treated by nitriding/PVD composite treatment forms a modified layer with a thickness of about 25 μm and nanohardness of about 29 GPa. Both processes form the γ_N phase, and the amorphous film formed on the surface of the nitriding/PVD composite treated specimen does not affect the phase of the intermediate layer. Compared to that of the substrate steel, the friction coefficients of the single nitrided specimen decrease to 0.520 and 0.311 under dry friction and corrosive friction conditions, respectively, while that of the nitriding/PVD composite treated specimen decrease to 0.074 and 0.119, respectively. The self-corrosion current density of the single nitrided and the nitriding/PVD composite treated specimens decrease from 4.602×10^-8 A/cm² to 4.084×10^-8 A/cm² and 3.318×10^-8 A/cm², respectively, and the self-corrosion potentials increase from -0.213 V to -0.195 V and -0.182 V, respectively. Comprehensively, the composite treatment can significantly improve the surface hardness, wear resistance, and corrosion resistance of the 316L austenitic stainless steel.

Key words: 316L stainless steel, ion nitriding, physical vapor deposition (PVD), microstructure, hardness, wear resistance, corrosion resistance

中图分类号:

TG156.8

曹驰, 张翔, 陈志林, 陈东升, 张琢. 316L不锈钢离子渗氮/PVD复合改性层的组织与性能[J]. 金属热处理, 2025, 50(1): 299-307.

Cao Chi, Zhang Xiang, Chen Zhilin, Chen Dongsheng, Zhang Zhuo. Microstructure and properties of ion nitriding/PVD composite modified layer on 316L stainless steel[J]. Heat Treatment of Metals, 2025, 50(1): 299-307.

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316L不锈钢离子渗氮/PVD复合改性层的组织与性能

Microstructure and properties of ion nitriding/PVD composite modified layer on 316L stainless steel

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