材料科学
回火
渗氮
冶金
腐蚀
马氏体
铬
马氏体不锈钢
微观结构
氮化物
图层(电子)
复合材料
作者
Alejandro Toro,Wojciech Z. Misiołek,André Paulo Tschiptschin
出处
期刊:Acta Materialia
[Elsevier]
日期:2003-07-01
卷期号:51 (12): 3363-3374
被引量:71
标识
DOI:10.1016/s1359-6454(03)00107-1
摘要
Nitrided and tempered AISI 410S stainless steel was tested under corrosion–erosion conditions and compared to conventional AISI 420 martensitic stainless steel. The corrosion–erosion resistance of the nitrided specimens was higher than that of the AISI 420 steel when tempered at 200 °C, but it decreased with tempering temperature in the range between 200 and 600 °C. The higher corrosion–erosion resistance of the high-nitrogen steel was credited to a more homogeneous distribution of chromium in martensite and a lower number of coarse second-phase particles, especially for tempering temperatures below 550 °C. The hexagonal ϵ-nitride was identified in specimens tempered at 200 °C, while finely distributed cubic CrN nitrides were observed in specimens tempered between 400 and 600 °C. Hexagonal Cr2N nitrides were observed at 550 and 600 °C. These coarse, high-chromium precipitates were responsible for the drop in corrosion resistance of the nitrided specimens.
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