Effect of Atmosphere Proportion and Nitriding Time on Plasma Nitriding of Duplex Stainless Steel

Abstract:

Samples of duplex stainless steel were plasma nitrided at different atmosphere proportion and nitriding time. The hardness and the corrosion resistance of the untreated and various plasma treated samples were characterised by a variety of analytical techniques. The results show that plasma nutriding at low temperature can improve hardness of duplex stainless steel and its corrosion properties at the same time. Declining the atmosphere proportion of ammonia and argon can effectively prevent the nonuniformity of hardness of nitriding layers and extension of nitriding time is conducive to enhance the hardness and thickness of nitriding layer. In addition, the corrosion peoporties of duplex stainless steel nitrided increase when the nitriding time improves, but its corrosion resistance rises slowly after nitriding for 9h.

• Periodical: Advanced Materials Research (Volumes 1061-1062)
• Pages: 61-64
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1061-1062.61
• Online since: December 2014
• Authors: Wei Ye*, Xing Sheng Tong
• Keywords: Corrosion Resistance, Duplex Stainless Steel, Hardness, Plasma Nitriding

References

[1] L. Poirier, Y. Corre, J.P. Lebrun. Surface Engineering. 18(2002): 439–442.

[2] C. X. Li and T. Bell. Materials Science and Technology. 23(2007): 335-361.

[3] H. Baba, T. Kodama, Y. Katada. Corrosion Science. 44(2002): 2393–2407.

[4] Yun-tao Xi, Dao-xin Liu, Dong Han. Surface & Coatings Technology. 202(2008): 2577–2583.