摘要
通过采用低碳、低磷、超低硫及适当微合金化的化学成分设计,结合高洁净度钢冶炼、高质量铸坯生产以及优化后的TMCP过程控制工艺,成功开发出20~35 mm大壁厚X70管件用管线钢,其金相组织为针状铁素体+贝氏体,晶粒细小组织均匀,具有良好的力学性能。
By adopting chemical composition design of low carbon,low phosphorus,ultra-low sulfur and appropriate microalloying in combination with processes of high cleanliness steel melting,high quality slab production and optimized TMCP process control,X70 grade pipeline fitting steel with 20~35 mm large wall thickness is successfully developed,of which the microstructure constitutes acicular-bainite with refined grain size and homogeneous structure,and mechanical properties are improved.
作者
张卫攀
刘红艳
徐桂喜
姚宙
Zhang Weipan;Liu Hongyan;Xu Guixi;Yao Zhou(HBIS Group Hansteel Company)
出处
《宽厚板》
2020年第1期5-8,共4页
Wide and Heavy Plate
关键词
大壁厚
管件用管线钢
洁净度
TMCP
力学性能
Large wall thickness
Pipeline fitting steel
Cleanliness
TMCP
Mechanical properties
