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微观组织对0Cr17Ni4Cu4Nb马氏体不锈钢的耐点腐蚀性能的影响
引用本文:查小琴,韩红民,谢玉林,李雪峰,张金民.微观组织对0Cr17Ni4Cu4Nb马氏体不锈钢的耐点腐蚀性能的影响[J].材料开发与应用,2012(4):64-68.
作者姓名:查小琴  韩红民  谢玉林  李雪峰  张金民
作者单位:中国船舶重工集团公司第七二五研究所;洛阳市质量技术监督检测测试中心;中国电子科技集团公司第二十二研究所
摘    要:采用化学浸泡法和模拟闭塞电池方法研究了固溶+时效和固溶+调整+时效处理的0Cr17Ni4Cu4Nb马氏体不锈钢的耐点腐蚀性能,并与18-8型奥氏体不锈钢(316L)耐点蚀性能进行了对比。结果表明,0Cr17Ni4Cu4Nb马氏体不锈钢组织内富Cu析出相促进了点蚀坑萌生,而点蚀坑发展则与组织形貌有关。固溶+调整+时效处理的0Cr17Ni4Cu4Nb马氏体不锈钢因组织内析出富Cu相多而大,其萌生的点蚀坑密度较高,但由于马氏体板条较细,其点蚀坑尺寸和深度较小;固溶+时效处理的0Cr17Ni4Cu4Nb马氏体不锈钢因组织内析出富Cu相少而小,萌生的点蚀坑密度较低,但粗大的板条马氏体组织导致点蚀坑尺寸和深度较大。与18-8型奥氏体不锈钢耐点蚀性能对比表明,通过对0Cr17Ni4Cu4Nb马氏体不锈钢进行合理的热处理,其耐点蚀性能可与18-8型奥氏体不锈钢相当。

关 键 词:CrNiCuNb  马氏体不锈钢  点腐蚀  微观组织

Pitting Corrosion Resistance of 0Cr17Ni4Cu4Nb Martensitic Stainless Steel and Influence of Microstructure
ZHA Xiao-qin,HAN Hong-min,XIE Yu-lin,LI Xue-feng,ZHANG Jin-min.Pitting Corrosion Resistance of 0Cr17Ni4Cu4Nb Martensitic Stainless Steel and Influence of Microstructure[J].Development and Application of Materials,2012(4):64-68.
Authors:ZHA Xiao-qin  HAN Hong-min  XIE Yu-lin  LI Xue-feng  ZHANG Jin-min
Affiliation:1(1.Luoyang Ship Material Research Institute,Luoyang 471039,China; 2.The Center of Inspection and Testing of Quality Technology Supervision of Luoyang City,Luoyang 471003,China; 3.China Research Institute of Radio Wave Propagation,Xinxiang 453003,China)
Abstract:The pitting corrosion resistance of martensitic stainless steels 0Cr17Ni4Cu4Nb treated separately with solid solution + aging and solid solution +adiustment+ aging was investigated in concentrated chloride media by chemical immersion and simulated occluded corrosion cell(OCC)test in comparison with that of 18-8 type austenitic stainless steel(316L).The results show that rich Cu precipitation phases in the martensile promote corrosion pit initiation,and the development of the pit depends on.organization morphology.For 0Cr17Ni4Cu4Nb martensitic stainless steel treated with solid solution +adiustment +aging,rich Cu precipitation phases are more and biger and the martensita lath is fine,the pits are more dense with size and depth smaller,while for 0Cr17Ni4Cu4Nb martensitic stainless steel treated with solid solution + aging,are less and smaller and the martensite lath is coarse,the pits are less dense with size and depth bigger.With pitting corrosion resistant of 18-8 type austenitic stainless steel comparison,it shows that the pitting corrosion resistance of 0Cr17Ni4Cu4Nb martensitic stainless steel is as good as 18-8 type austenitic stainless steel,if heat treated properly.
Keywords:0Cr17Ni4Cu4Nb  Martensitic stainless steel  Pitting corrosion  Microstructure
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