Solid lubrication coating of FeS layer on the surface of SKD 61 steel produced by plasma sulfnitriding
Solid lubrication coating of FeS layer on the surface of SKD 61 steel produced by plasma sulfnitriding
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DOI：
10.1016/j.surfcoat.2005.01.099
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发表时间：
2006-03
影响因子：
5.4
通讯作者：
Insup Lee;I. Park
中科院分区：
文献类型：
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作者：
Insup Lee;I. Park
采用等离子体亚氮化技术对skd61钢进行了表面硬化处理。在等离子体亚氮化法中，在等离子体氮化法中使用的n2和h2混合物中加入少量H2S气体。等离子体亚氮化在3 torr压力下580°C下进行了20 h，在15-20 μm厚的化合物层的顶部形成了厚度为2-3 μm的极薄的fees硫化铁层，该层由α -Fe2-3N和γ′-Fe4N组成。与商业等离子体氮化处理相比，等离子体亚氮化处理由于存在薄的FeS层，填充了复合层外部的微孔和微裂纹，具有更好的表面粗糙度和耐腐蚀性。等离子体亚氮化样品的耐磨性也较好，这是由于有较薄的FeS层作为固体润滑剂。
Plasma sulfnitriding technology has been employed to harden the surface of SKD 61 steel. In this plasma sulfnitriding method, a small amount of H2S gas has been added in the mixture of N2and H2used in the plasma nitriding method. This process has been performed under 3 torr pressure at 580 °C for 20 h. The plasma sulfnitriding yielded the very thin FeS iron sulfide layer 2–3 μm in thickness on the top of a 15–20 μm thick compound layer, which consisted of ɛ-Fe2–3N and a second phase of γ′-Fe4N. In comparision with commercial plasma nitriding treatment, the plasma sulfnitriding treatment has showed better surface roughness and corrosion resistance due to the presence of the thin FeS layer, which filled microvoids and microcracks in the outside of the compound layer. It has also been found that plasma sulfnitrided sample revealed better wear resistance due to the presence of the thin FeS layer which acted as a solid lubricant.