奚运涛,刘道新,韩栋,韩增福

• 1:西北工业大学腐蚀与防护研究室
• 2:西北工业大学腐蚀与防护研究室
• 3:西北工业大学腐蚀与防护研究室
• 4:西安陕鼓动力股份有限公司 陕西西安710072

摘要(Abstract)：

采用不同温度对AISI 420马氏体不锈钢进行离子渗氮处理。借助光学显微镜和X射线衍射(XRD)技术分析了渗氮层的微观组织结构,利用显微硬度计测试了渗氮层的硬度分布,通过电化学极化曲线测试和盐雾腐蚀试验研究了离子渗氮AISI 420不锈钢在模拟工业环境中的腐蚀行为。结果表明:AISI 420不锈钢350℃低温离子渗氮层由ε-Fe3N和N过饱和固溶体αN相组成,其化学稳定性高,加之固溶Cr元素的联合作用,明显提高了AISI 420不锈钢基材的腐蚀抗力。AISI 420钢经450℃和550℃渗氮处理,渗氮层中的αN分解成了α相和CrN,造成基体贫Cr,降低了基材的耐蚀性能。马氏体不锈钢低温离子渗氮处理不仅可以提高表面硬度,而且可以获得良好的耐蚀性能。

关键词(KeyWords)： 离子渗氮;马氏体不锈钢;腐蚀;AISI420

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(50171054,50671085)

作者(Author): 奚运涛,刘道新,韩栋,韩增福

参考文献(References)：

• [1]Menthe E,Bulak A,Olfe J,et al.Improvement of the mechanical properties of austenitic stainless steel after plasma nitriding[J].Surface and CoatingTechnology,2000,1133-1134:259-263.
• [2]林义民,徐姚,梁爱民,等.处理温度对1Cr18Ni9Ti钢脉冲直流等离子渗氮的影响[J].金属热处理,2005,30(10):64-67.LIN Yi-min,XU Yao,LIANG Ai-min,et al.Effects of treatment temperature on DC-pulsed plasma nitriding of 1Cr18Ni9Ti steel[J].Heat Treatment ofMetals,2005,30(10):64-67.
• [3]Sun Y,Bell T.Sliding wear characteristics of low temperature plasma nitrided 316 austenitic stainless steel[J].Wear,1998,218(1):34-42.
• [4]Bell T,LI X Y,SUN Y.对于提高奥氏体不锈钢离子渗氮表面腐蚀性能的措施[J].中国表面工程,1998,4:40-49.
• [5]WANG Liang,XU Bin,YU Zhi-wei,et al.The wear and corrosion properties of stainless steel nitrided by low-pressure plasma-arc source ion nitriding at lowtemperature[J].Surface and Coating Technology,2000,130:304-308.
• [6]苟伟,李国卿,柳翠,等.不锈钢等离子体源离子渗氮-多弧离子镀膜复合技术[J].材料热处理学报,2004,25(4):57-59.GOU Wei,LI Guo-qing,LIU Cui,et al.Study on plasma nitriding and multi-arc ion plating on stainless steel[J].Trans Mater Heat Treat,2004,25(4):57-59.
• [7]王亮,许晓磊,许彬,等.奥氏体不锈钢低温渗氮层的组织与耐磨性[J].摩擦学学报,2000,20(1):67-69.WANG Liang,XU Xiao-lei,XU Bin,et al.Structure and wear resistance of Ion nitrided austenite stainless steel[J].Tribology,2000,20(1):67-69.
• [8]Sun Y,Bell T,Wood G.Wear behaviour of plasma-nitrided martensitic stainless steel[J].Wear,1994,(178):131-138.
• [9]Alphonsa I,Chainani A,Raole P M,et al.A study of martensitic stainless steel AISI 420 modified using plasma nitriding[J].Surface and CoatingTechnology,2002,150:263-268.
• [10]冯忠信,宋义文.2Cr13钢离子渗氮处理的疲劳强度[J].机械强度,1997,19(3):61-63.FENG Zhong-xin,SONG Yi-wen.Fatigue strength of ionitrided 2Cr13 steel[J].Journal of Mechanical Strength,1997,19(3):61-63.
• [11]LI C X,Bell T.Corrosion properties of plasma nitrided AISI 410 martensitic stainless steel in 3.5%NaCl and 1%HCl aqueous solutions[J].CorrosionScience,2006,48(8):2036-2049.
• [12]Kim S K,Yoo J S,Preiest J M,et al.Characteristics of martensitic stainless steel nitrided in a low pressure RF plasma[J].Surface and Coating Technology,2003,163-164:380-385.

文章评论(Comment)：