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 .
出处
《武汉科技大学学报》
CAS
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)
关键词
速冷温度
高Nb
X80管线钢
固溶强化
低屈强比
fast cooling temperature
high level of Nb
X80pipeline steel
solution strengthening
low yield ratio
