超快速冷却温度对高铌X80管线钢组织和性能的影响  

Effect of ultra fast cooling temperature on microstructure and mechanical properties of a high Nb-microalloyed X80 pipeline steel

作　　者：周峰[1,2] 吴开明[1] 

机构地区：[1]武汉科技大学高性能钢铁材料及其应用湖北省协同创新中心,湖北武汉430081 [2]湖南华菱涟源钢铁有限公司,湖南娄底417009

出　　处：《武汉科技大学学报》2014年第5期321-325,共5页Journal of Wuhan University of Science and Technology

基　　金：国家自然科学基金资助项目(50734004)

摘　　要：对比观察不同超快速冷却温度下生产的高铌X80管线钢的显微组织和析出物,研究其组织和性能的对应关系,并分析了Nb在X80管线钢中的强化机理。结果表明,利用高Nb微合金化进行控制轧制,采用低超快速冷却温度有效提高钢材抗拉强度,获得了低屈强比X80管线钢,可应用于抗大变形管线钢的制造。The microstructure and precipitates of a high Nb-microalloyed X80 pipeline steel with differ-ent ultra fast cooling temperatures were observed ,the relation between the steel’s microstructure with its mechanical properties was investigated ,and the strengthening mechanism of Nb-microallo-ying was analyzed .The results show that controlled rolling with high level Nb-microalloying at low ultra fast cooling temperature can produce X80 pipeline steel of high tensile strength and low yield ra-tio ,w hich can be used in situations calling for resistance to high deformation .

关 键 词：速冷温度 高Nb X80管线钢 固溶强化 低屈强比 

分 类 号：TF01[冶金工程—冶金物理化学]