| LU Xiao-hui,GAO Yuan,WANG Cheng-lei,WEI Wen-zhu,ZHANG Guang-yao.High-temperature Wear Properties of Austenite Stainless Steel with Plasma Surface Hafniuming and Carburization[J],44(8):38-43 |
| High-temperature Wear Properties of Austenite Stainless Steel with Plasma Surface Hafniuming and Carburization |
| Received:April 04, 2015 Revised:August 20, 2015 |
| View Full Text View/Add Comment Download reader |
| DOI：10.16490/j.cnki.issn.1001-3660.2015.08.007 |
| KeyWord:Austenitic stainless steel double glow plasma carburizing Hf-alloyed layer carbide high-temperature wear behavior |
| Author | Institution |
| LU Xiao-hui |
1. School of Materials Science and Engineering,Guilin University of Electronic Technology, Guilin , China;2. Guangxi Key Laboratory of Information Materials, Guilin University of Electronic Technology, Guilin , China |
| GAO Yuan |
1. School of Materials Science and Engineering,Guilin University of Electronic Technology, Guilin , China;2. Guangxi Key Laboratory of Information Materials, Guilin University of Electronic Technology, Guilin , China |
| WANG Cheng-lei |
1. School of Materials Science and Engineering,Guilin University of Electronic Technology, Guilin , China;2. Guangxi Key Laboratory of Information Materials, Guilin University of Electronic Technology, Guilin , China |
| WEI Wen-zhu |
1. School of Materials Science and Engineering,Guilin University of Electronic Technology, Guilin , China;2. Guangxi Key Laboratory of Information Materials, Guilin University of Electronic Technology, Guilin , China |
| ZHANG Guang-yao |
1. School of Materials Science and Engineering,Guilin University of Electronic Technology, Guilin , China;2. Guangxi Key Laboratory of Information Materials, Guilin University of Electronic Technology, Guilin , China |
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| Abstract: |
| Objective To improve high-temperature wear properties of 0Cr18Ni9Ti austenite stainless steel. Methods Wear properties of stainless steel (substrate for short), and the substrates after treatment with plasma surface hafniuming and carburization were investigated on HT-500 ball-disc wear tester. The high-temperature friction properties and friction mechanism were analyzed and compared with those of the stainless steel substrate and stainless steel with surface hafniuming. Results The thickness of Hf-alloyed layer was 45 μm, and that of Hf+C layer was 100 μm. The Hf+C layer dispersed a large amount of granular particles and short sticks of carbide, and the main types of carbide were MC, M7 C3 and M23 C6 . The wear curve of the substrate showed large fluctuation, the Hf-alloyed sample had greater friction coefficient but the wear microstructure was stable; the Hf+C-treated sample had the minimum friction coefficient. The wear loss was in the order of substrate> Hf-alloyed sample> Hf+C-treated sample. The relative wear resistance of Hf-alloyed sample at 300 ℃ and 500 ℃ were 1. 47 and 1. 94 times of the substrate, while that of Hf+C-treated sample was about 2. 13 and 2. 28 times of the substrate. The scratches of the substrate were wide and deep. The surface hardness of Hf-alloyed sample was improved, and alloy oxide was generated during the friction wear process. The Hf+C-treated sample had high surface hardness and the matrix had good toughness, the scratches were shallow and narrow. Conclusion Hafniuming and carburization could improve the high-temperature wear properties of the surface of 0Cr18Ni9Ti austenite stainless steel, and Hf+C-treated sample showed better wear performance. |
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