Mechanical and corrosion resistant properties of martensitic stainless steel plasma nitrocarburized with rare earths addition
来源期刊:Journal of Rare Earths2012年第8期
论文作者:刘瑞良 乔英杰 闫牧夫 傅宇东
文章页码:826 - 830
摘 要:In order to improve surface hardness and corrosion resistant property of 17-4PH martensitic stainless steel, the steel was plasma nitrocarburized at 560 °C for 2-24 h in a gas mixture of nitrogen, hydrogen and ethanol with rare earths (RE) addition. The experimental results showed that the modified layer was characterized by a compound layer containing two distinct zones (i.e. out ’dark zone’ and inner ’white zone’). The inner ’white zone’ was almost a precipitation free zone and had high hardness as well as good corrosion resistance. Anodic polarization test results showed that the specimens plasma nitrocarburized with RE addition had good corrosion resistance resulted mainly from their higher corrosion potentials, lower corrosion current densities and larger passive regions as compared with those of the untreated one.
刘瑞良1,2,乔英杰1,闫牧夫2,傅宇东1
1. College of Material Science and Chemical Engineering, Harbin Engineering University2. School of Materials Science and Engineering, Harbin Institute of Technology
摘 要:In order to improve surface hardness and corrosion resistant property of 17-4PH martensitic stainless steel, the steel was plasma nitrocarburized at 560 °C for 2-24 h in a gas mixture of nitrogen, hydrogen and ethanol with rare earths (RE) addition. The experimental results showed that the modified layer was characterized by a compound layer containing two distinct zones (i.e. out ’dark zone’ and inner ’white zone’). The inner ’white zone’ was almost a precipitation free zone and had high hardness as well as good corrosion resistance. Anodic polarization test results showed that the specimens plasma nitrocarburized with RE addition had good corrosion resistance resulted mainly from their higher corrosion potentials, lower corrosion current densities and larger passive regions as compared with those of the untreated one.
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