成分和组织对中锰钢模拟飞溅区腐蚀行为影响  

Influence of alloy element and microstructure on corrosion behavior of medium-Mn steel in a simulated marine splash zone

作　　者：刘伟[1] 郑梦瑶[1] 王志磊[1] 刘锦[1] 郑少川 高秀华[1] 

机构地区：[1]东北大学轧制技术及连轧自动化国家重点实验室,辽宁沈阳110819

出　　处：《钢铁》2017年第8期75-80,共6页Iron and Steel

基　　金：国家级大学生创新创业训练计划资助项目(160109);国家高技术研究发展计划资助项目(2015AA03A501)

摘　　要：采用回火调质处理制备出含逆转变奥氏体的中锰钢,并对逆转变奥氏体的形貌进行了观察,通过周期浸润腐蚀试验研究了海洋平台用中锰钢在海洋飞溅区的腐蚀行为,主要研究了中锰钢中合金元素和微观组织对腐蚀行为的影响。结果表明,耐蚀元素中铬的防腐作用最显著,在内外锈层中间处出现了含铬化合物,改善了锰元素对腐蚀过程的负面作用并稳定了腐蚀速率。试验钢的微观组织也对其腐蚀行为产生影响,腐蚀过程中,回火马氏体优先溶解,逆转变奥氏体对腐蚀起到修正的作用。A new type low-C medium-Mn steel that contained reversed austenite was manufactured by tempering treat- ment. The microstructure of the reversed transformation austenite was observed. The corrosion behavior of the tested me- dium-Mn steel in a simulated marine splash zone was investigated by periodic alternate immersion test, and influence of alloy element and microstructure on the corrosion behavior was researched. The results show that Cr as the corrosion re- sistance element, has the most remarkable corrosion effect. With increasing the corrosion time and in the presence of an- ti-corrosion elements, Cr may form a barrier to stabilize the corrosion rate and improve the negative effects from Mn. In addition, the microstructure of the tested steel has an effect on the corrosion behavior, and during the corrosion pro- cess, the tempered martensite dissolves at first, and the reversed transformation austenite plays a positive role in regulat- ing the corrosion process.

关 键 词：中锰钢 腐蚀行为 微观形貌 合金元素 

分 类 号：TG178[金属学及工艺—金属表面处理]