Effects of DC plasma nitriding parameters on microstructure and properties of 304L stainless steel
2008; Elsevier BV; Volume: 60; Issue: 3 Linguagem: Inglês
10.1016/j.matchar.2008.08.011
ISSN1873-4189
AutoresJun Wang, Ji Xiong, Qian Peng, Hongyuan Fan, Ying Wang, Guijiang Li, Shen Bao-luo,
Tópico(s)Surface Treatment and Residual Stress
ResumoA wear-resistant nitrided layer was formed on a 304L austenitic stainless steel substrate by DC plasma nitriding. Effects of DC plasma nitriding parameters on the structural phases, micro-hardness and dry-sliding wear behavior of the nitrided layer were investigated by optical microscopy, X-ray diffraction, scanning electron microscopy, micro-hardness testing and ring-on-block wear testing. The results show that the highest surface hardness over a case depth of about 10 µm is obtained after nitriding at 460 °C. XRD indicated a single expanded austenite phase and a single CrN nitride phase were formed at 350 °C and 480 °C, respectively. In addition, the S-phase layers formed on the samples provided the best dry-sliding wear resistance under the ring-on-block contact configuration test.
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