高锰氮双相不锈钢25Cr-2Ni-10Mn-xW-N的组织和性能研究  

STUDY ON MICROSTRUCTURE AND PROPERTIES OF NEW TYPE HIGH Mn AND N DUPLEX STAINLESS STEELS 25Cr-2Ni-10Mn-xW-N

作　　者：龙门[1] 李钧[1] 肖学山[1] 

机构地区：[1]上海大学材料研究所,上海200072

出　　处：《上海金属》2012年第2期8-13,共6页Shanghai Metals

基　　金：上海市教委创新基金项目(09YZ20);上海市科委项目(065211026)

摘　　要：研究了钨含量对新型高锰氮双相不锈钢25Cr-2Ni-xW-10Mn-N(x=1.5,3.0,4.5)的显微组织、力学性能以及耐腐蚀性能的影响。结果表明:该系不锈钢固溶处理后具有典型的铁素体+奥氏体双相组织,随着固溶温度的增加,铁素体含量上升。随着钨含量的增加,σ相析出增加,铁素体体积分数增大,耐点蚀性增强,屈服强度上升,断裂延伸率和冲击韧性降低。此类钢作为结构材料具有广阔的应用前景。A new family of resource saving,high manganese and nitrogen super duplex stainless steels,with a composition of 25Cr-2Ni-10Mn-xW-N（x=1.5,3.0,4.5）,were developed by studying the effect of W content on the microstructure,mechanical properties and corrosion properties.The results showed that these alloys had a balanced ferrite-austenite microstructure,and the ferrite content increased with the increasing of solution treatment temperature.With the increasing of tungsten content,the precipitation tendency of σ phase and ferrite content in the alloy increased,so did pitting corrosion resistance and yield strength,however,the elongation and impact energy decreased.This type alloy would be of significance in structure material application.

关 键 词：双相不锈钢 钨含量 显微组织 力学性能 耐点蚀性能 

分 类 号：TG142.71[一般工业技术—材料科学与工程]