|Enhancement of mechanical property and corrosion resistance of 316 L stainless steels by low temperature arc plasma nitriding|
|Yang, W. J.; Zhang, M.; Zhao, Y. H.; Shen, M. L.; Lei, H.; Xu, L.; Xiao, J. Q.; Gong, J.; Yu, B. H.; Sun, C.; Zhao, YH; Sun, C (reprint author), Chinese Acad Sci, Inst Met Res, Surface Engn Div, Shenyang 110016, Peoples R China.
|发表期刊||SURFACE & COATINGS TECHNOLOGY
|摘要||AISI 316 L austenitic stainless steels (316 L SS) were nitrided to enhance their mechanical property and corrosion resistance by a high efficiency low-pressure arc plasma nitriding process at low temperature (similar to 400 degrees C). Arc currents ranging from 55 A to 95 A were applied to generate the arc plasma. The effect of arc current on the microstructure, mechanical property of the nitrided layers was investigated by using XRD, SEM, TEM, Vickers microhardness tester and ball-on-disk tribometer, respectively. The corrosion resistance was also evaluated by potentiodynamic polarization in 3.5% NaCI solution. The results showed that the nitrided layers consisted primarily of the expanded austenite (gamma(N)) phase with a trace of a mixture of CrN and Fe3N. The thickness of nitrided layer could reach 15 mu m in 1 hat 400 degrees C in virtue of the high-density and high-energy nitrogen plasma generated from this process, which showed an extremely fast nitriding kinetics. Due to the solution strengthening of the nitrogen super-saturation gamma(N)-phase formed on the surfaces of the samples, the surface microhardness and the wear resistance of the nitrided 316 L SS was significantly improved. The worn surfaces revealed that worn behavior of the low current (below 85 A) nitrided samples was remarkably dominated by micro-abrasion and spalling holes, while the 95 A sample was worn in a mode featured by cracks and spalling blocks. Besides, because chromium nitride precipitation was eliminated, the nitrided samples still showed excellent corrosion resistance, which was comparable to untreated 316 L SS. (C) 2016 Elsevier B.V. All rights reserved.|
|部门归属||[yang, w. j.] univ sci & technol china, sch mat sci & engn, hefei 230027, anhui, peoples r china
; [yang, w. j.
; zhao, y. h.
; shen, m. l.
; lei, h.
; xu, l.
; xiao, j. q.
; gong, j.
; yu, b. h.
; sun, c.] chinese acad sci, inst met res, shenyang 110016, peoples r china
; [zhang, m.] liaoning normal univ, sch phys & elect technol, dalian 116029, peoples r china
|关键词||Low Temperature Arc Plasma Nitriding
|资助者||Natural Science Foundation of China ; Program for Liaoning Excellent Talents in University [LJQ20111145]; Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry 
|通讯作者||Zhao, YH; Sun, C (reprint author), Chinese Acad Sci, Inst Met Res, Surface Engn Div, Shenyang 110016, Peoples R China.|
Yang, W. J.,Zhang, M.,Zhao, Y. H.,et al. Enhancement of mechanical property and corrosion resistance of 316 L stainless steels by low temperature arc plasma nitriding[J]. SURFACE & COATINGS TECHNOLOGY,2016,298:64-72.
Yang, W. J..,Zhang, M..,Zhao, Y. H..,Shen, M. L..,Lei, H..,...&Sun, C .(2016).Enhancement of mechanical property and corrosion resistance of 316 L stainless steels by low temperature arc plasma nitriding.SURFACE & COATINGS TECHNOLOGY,298,64-72.
Yang, W. J.,et al."Enhancement of mechanical property and corrosion resistance of 316 L stainless steels by low temperature arc plasma nitriding".SURFACE & COATINGS TECHNOLOGY 298(2016):64-72.