摘要
用活性屏离子渗氮技术分别对处于悬浮电位和阳极电位的AISI316L奥氏体不锈钢进行低温渗氮处理。并对渗氮层的组织、形貌、相结构、显微硬度和耐蚀性能进行分析。结果表明,在这两种电位状态下处理的试样均可获得具有S相结构特征的单相硬化层。渗氮层不仅具有高的硬度,还有良好的耐蚀性能。在活性屏离子渗氮过程中,从活性屏上溅射下来的中性S相粒子也可以起到氮载体的作用。活性屏空间中性粒子和电子的撞击足以消除不锈钢表面钝化膜对氮的阻隔作用。
AISI 316L austenitic stainless steel was nitirded in floating potential and anodic （zero） potential at low temperature by active screen plasma nitriding （ASPN）.The microstructures,surface morphologies,phase structures,microhardness and corrosion resistance of the nitrided layers were tested and analyzed.The experimental results show that ASP nitriding under both of these electric potentials can produce a hardened layer on the samples with single S phase structure which exhibits not only high mircorhardness but also good corrosion resistance.The neutral particles sputtered from the active screen play an important role of nitrogen mass transfer in the AS plasma nitriding.The bombardment of neutral particles and electrons in the active screen space can remove the passivated film hindering the nitrogen penetration.
出处
《金属热处理》
EI
CAS
CSCD
北大核心
2007年第11期42-45,共4页
Heat Treatment of Metals
关键词
奥氏体不锈钢
活性屏离子渗氮
悬浮电位
阳极电位
austentic stainless steel
active screen plasma nitriding （ASPN）
floating potential
anodic （zero） potential
