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Effect of load on wear behaviors of high-nitrogen stainless steel and 304 stainless steel |
SHI Xue-hong1, LI Yan-xin2, HOU Xiang-dong1, HAO Jiu-jiu1 |
1.Department of Metallurgy and Environmental Engineering, Shanxi Engineering Vocational College, Taiyuan 030009, Shanxi, China; 2. Barun Mining Branch, Inner Mongol Baotou Steel Union Co., Ltd.,Baotou 014080, Inner Mongol, China |
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Abstract The dry wear test of high-nitrogen stainless steel (18.8%Cr-12.6%Mn-4.5%Ni-0.55%N) and 304 stainless steel were carried out by the sand table wear machine under different loads. The worn surfaces of samples were studied by field emission scanning electron microscopy (SEM). These results show that the wear resistance of high-nitrogen stainless steel is better than that of 304 stainless steel under low, medium and high loads. The wear resistance of high-nitrogen stainless steel is 0.48, 0.30 and 0.22 h/g, respectively, while that of 304 stainless steel is 0.44, 0.25 and 0.18 h/g, respectively. Under low load, the wear mechanism of 304 stainless steel is furrow and chiseling wear, and with load increasing, the wear mechanism is plastic deformation and micro-cutting. For high-nitrogen stainless steel, the wear mechanism is furrow and micro-cutting wear under low load, and with load increasing, the wear mechanism is micro-cutting. Moreover, both of the XRD patterns of 304 and high-nitrogen stainless steels under high load (100 N) show single-phase austenite, indicating that no obvious martensitic transformation occurred.
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Received: 20 March 2020
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