氮对冷轧022Cr18Ni8N亚稳奥氏体不锈钢组织及力学性能的影响  

Effect of nitrogen on microstructure and mechanical properties of cold-rolled 022Cr18Ni8N metastable austenitic stainless steel

作　　者：刘锦润 郎宇平[2] 陈海涛[2] 冯翰秋 高智君 张正富[1] Liu Jinrun;Lang Yuping;Chen Haitao;Feng Hanqiu;Gao Zhijun;Zhang Zhengfu(Faculty of Materials Science and Engineering,Kunming University of Science and Technology,Kunming Yunnan 650093,China;Research Institute of Special Steels,Central Iron and Steel Research Institute Co.,Ltd.,Beijing 100081,China)

机构地区：[1]昆明理工大学材料科学与工程学院,云南昆明650093 [2]钢铁研究总院有限公司特殊钢研究院,北京100081

出　　处：《金属热处理》2025年第1期195-200,共6页Heat Treatment of Metals

摘　　要：以不同氮含量(0%、0.02%、0.05%和0.14%)的022Cr18Ni8N亚稳奥氏体不锈钢为研究对象,利用OM、EBSD和XRD等对冷轧前后试验钢的组织变化进行表征,并对其进行室温拉伸试验,研究氮对其组织和性能的影响。结果表明,氮能提高亚稳奥氏体不锈钢中奥氏体的稳定性,降低冷变形过程中形变诱导马氏体的产生;形变诱导马氏体在变形带与变形带交叉点、单独变形带处、变形带和晶界交叉点形核;适量氮通过调控相变强化和固溶强化两种强化机制,使亚稳奥氏体不锈钢获得较好的综合力学性能。Microstructure chang of metastable austenitic stainless steel 022Cr18Ni8N with varying nitrogen contents(0%,0.02%,0.05% and 0.14%) before and after cold rolling was investigated,and the effect of nitrogen on the microstructure and properties was characterized by using OM,EBSD,XRD,and room temperature tensile tests.The results indicate that nitrogen can improve the stability of austenite of the tested steel and reduce the formation of deformation induced martensite during cold deformation.The strain-induced martensite nucleates at the intersections of deformation bands,within solitary deformation bands,and at the intersections of deformation bands and grain boundaries.An appropriate nitrogen content endows metastable austenitic stainless steel with enhanced comprehensive mechanical properties through the regulation of two strengthening mechanisms,namely phase transformation strengthening and solution strengthening.

关 键 词：氮含量 亚稳奥氏体不锈钢 形变诱导马氏体 力学性能 强化机制 

分 类 号：TG142.71[一般工业技术—材料科学与工程]