40CrNiMo钢回火后显微组织的腐蚀工艺研究  

Corrosion Process of Microstructure of 40CrNiMo after Tempering

作　　者：吴琳琅 张崔禹 袁春明[3] 吴昂 高畅 徐昊 马叙[2] WU Linlang;ZHANG Cuiyu;YUAN Chunming;WU Ang;GAO Chang;XU Hao;MA Xu(Tianjin Key Laboratory of Fastening Joint Technology Enterprise,Aerospace Precision Industry Co.,Ltd.,Tianjin 300300,China;School of Materials Science and Engineering,Tianjin University of Technology,Tianjin 300384,China;China Helicopter Research and Development Institute,Jingdezhen 333001,China)

机构地区：[1]航天精工股份有限公司,天津市紧固连接技术企业重点实验室,天津300300 [2]天津理工大学材料科学与工程学院,天津市金属材料高效近净成形技术工程中心,天津300384 [3]中国直升机设计研究所,江西景德镇333001

出　　处：《电镀与精饰》2022年第4期36-41,共6页Plating & Finishing

基　　金：天津市紧固连接技术企业重点实验室开放课题(HTJG-TJ-JS-2020-0017);天津市企业科技特派员项目(19JCTPJC57300);天津市新材料重大专项(18ZXCLGX00040)。

摘　　要：针对回火之后的40CrNiMo钢,采用了不同的腐蚀制度。回火之后,为了得到良好清晰的微观组织,分别采用化学腐蚀和电解腐蚀的方法对磨抛好的件进行腐蚀。在化学腐蚀方面:用光学显微镜(OM)观察了4%、5%、6%的硝酸酒精溶液以及3%的三氯化铁加10%的盐酸水溶液腐蚀之后40CrNiMo的微观组织;在电解腐蚀方面:探究了10%、20%的铬酸溶液及10%草酸溶液的电解腐蚀效果。结果表明:在想要得到清晰,明显的显微组织条件的前提下,对40CrNiMo钢这种元素成分多的金属,采用3%的三氯化铁加10%的盐酸水溶液化学耐腐蚀性较好。采用10%的铬酸溶液及10%的草酸溶液电解腐蚀的方法更可控,但效率稍低。Different corrosion regimes were adopted for tempered 40CrNiMo steel. After tempering,in order to obtain a good and clear microstructure,chemical corrosion and electrolytic corrosion are used to corrode the polished parts respectively. In terms of chemical corrosion:the microstructure of 40CrNiMo corroded by 4 %,5 %,6 % nitric acid alcohol solution and 3 % ferric chloride plus 10 % hydrochloric acid aqueous solution was observed by optical microscope(OM);In terms of electrolytic corrosion:the electrolytic corrosion effects of 10 %,20 % chromic acid solution and 10% oxalic acid solution were explored. The results show that on the premise of obtaining clear and obvious microstructure conditions,chemical corrosion:for 40CrNiMo steel,a metal with many elements,it is better to use3 % ferric chloride and 10 % hydrochloric acid aqueous solution. In terms of electrolytic corrosion:the method of electrolytic corrosion with 10 % chromic acid solution and 10 % oxalic acid solution is more controllable,but the efficiency is slightly lower.

关 键 词：腐蚀制度 微观组织 化学腐蚀 电解腐蚀 40CrNiMo 

分 类 号：TG178[金属学及工艺—金属表面处理]