Surface hardness improvement of plasma-sprayed AISI 316L stainless steel coating by low-temperature plasma carburizing
Surface hardness improvement of plasma-sprayed AISI 316L stainless steel coating by low-temperature plasma carburizing
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DOI：
10.1016/j.apt.2012.12.011
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发表时间：
2013-09-01
影响因子：
5.2
通讯作者：
Ueda, Nobuhiro
中科院分区：
文献类型：
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作者：
Adachi, Shinichiro;Ueda, Nobuhiro
在773 K以下对奥氏体不锈钢进行低温渗碳可以产生膨胀的奥氏体，即s相，其表面硬度得到提高，同时保持了耐腐蚀性。采用低温渗碳等离子喷涂奥氏体aisi316l不锈钢涂层，提高了涂层的耐磨性。由于喷涂的aisi316l涂层包括在等离子喷涂过程中在空气中合成的氧化层，氧化层可能会限制碳的扩散。结果表明，经低温渗碳处理的aisi316l涂层的含碳量低于aisi316l钢板；渗碳层厚度差异不大。渗碳后AISI 316L涂层的维氏硬度在1000 HV以上，干滑动磨损比磨损量提高了2个数量级。结果表明，低温等离子渗碳使涂层的耐磨性提高到aisi316l不锈钢板渗碳的水平。在3.5质量% NaCl溶液中，渗碳后的AISI 316L涂层的耐腐蚀性略低于未渗碳后的AISI 316L涂层。(C) 2013日本粉体技术学会。由爱思唯尔B.V.和日本粉末技术协会出版。版权所有。
Low-temperature carburizing below 773 K of austenite stainless steel can produce expanded austenite, known as S-phase, where surface hardness is improved while corrosion resistance is retained. Plasma-sprayed austenitic AISI 316L stainless steel coatings were carburized at low temperatures to enhance wear resistance. Because the sprayed AISI 316L coatings include oxide layers synthesized in the air during the plasma spraying process, the oxide layers may restrict carbon diffusion. We found that the carbon content of the sprayed AISI 316L coatings by low-temperature carburizing was less than that of the AISI 316L steel plates; however, there was little difference in the thickness of the carburized layers. The Vickers hardness of the carburized AISI 316L spray coating was above 1000 HV and the amount of specific wear by dry sliding wear was improved by two orders of magnitude. We conclude that low-temperature plasma carburizing enabling the sprayed coatings to enhance the wear resistance to the level of carburized AISI 316L stainless steel plates. As for corrosion resistance in a 3.5 mass% NaCl solution, the carburized AISI 316L spray coating was slightly inferior to the as-sprayed AISI 316L coating. (C) 2013 The Society of Powder Technology Japan. Published by Elsevier B.V. and The Society of Powder Technology Japan. All rights reserved.