Performance enhancement by plasma nitriding at low gas pressure for 304 austenitic stainless steel

被引：30

作者：

Lu, Shijing ^{[1
,2
]}

Zhao, Xiaobing ^{[1
,2
]}

Wang, Shukai ^{[2
]}

Li, Jingcai ^{[1
]}

Wei, Wei ^{[1
,2
]}

Hu, Jing ^{[1
,2
]}

机构：

[1] Changzhou Univ, Jiangsu Key Lab Mat Surface Sci & Technol, Changzhou 213164, Peoples R China

[2] Jiangsu Collaborat Innovat Ctr Photovolta Sci & E, Changzhou 213164, Peoples R China

来源：

VACUUM | 2017年 / 145卷

基金：

中国国家自然科学基金;

关键词：

Plasma nitriding; 304 austenitic stainless steel; Gas pressure; Wear resistance; LOW-TEMPERATURE; CORROSION BEHAVIOR; SHORT-TIME; 304-STAINLESS-STEEL; TECHNOLOGY; KINETICS; LAYER;

D O I：

10.1016/j.vacuum.2017.09.020

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Plasma nitriding was conducted at low gas pressure and low temperature of 400 degrees C for 304 austenitic stainless steel. The combined performance of the treated specimens was evaluated by scanning electronic microscopy (SEM), X-ray diffractometer (XRD), microhardness tester, ball-on-disc tribometer and electrochemical polarization. The results showed that an expanded austenite (gamma(N)), also called S phase layer was formed after plasma nitriding at low gas pressure and low temperature of 400 degrees C, and the nitriding efficiency was significantly improved at lower gas pressure; maximum expanded austenite layer of 51.7 mu m and effective hardening layer of 72 mu m were obtained at low gas pressure of 100 Pa. Surface hardness and wear resistance were enhanced dramatically by plasma nitriding at 100 Pa, and the weight loss after wear test decreased from 0.102 g to the minimum of 0.013 g. Meanwhile, the corrosion resistance was improved after plasma nitriding at 100 Pa, the minimum corrosion current of 0.009 mu A . cm(-2) and the maximum corrosion potential of -361.9 mV are obtained. (C) 2017 Published by Elsevier Ltd.

引用

页码：334 / 339

页数：6

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