摘要
通过不含Mo的化学成分设计和三种工艺试验,确定了最佳的L485M级管线钢轧制工艺。采取降低加热温度以及对控轧控冷工艺的深入研究,通过提高原始奥氏体晶粒度,提升冷却速率,可以抑制先共析铁素体的转变,同时增加了针状铁素体的数量;提高了强度,同时改善了-40℃冲击吸收能力。通过实验及批量生产,L485M级管线钢能够满足技术协议要求,实现了低成本管线钢的生产。
The optimum rolling process of L485 M grade pipeline steel was determined through chemical composition design without Mo and three process tests.The transformation of pre-eutectoid ferrite can be inhibited by reducing heating temperature and further study on controlled rolling and cooling process.By increasing the grain size of original austenite and cooling rate,the number of acicular ferrite can be increased.The strength of L485 M pipeline steel is improved,and the impact absorption capacity at-40℃is improved.Through experiments and mass production,L485 M pipeline steel can meet the requirements of technical agreement and realize the production of low-cost pipeline steel.
作者
杨志强
曲之国
杨海峰
郑伟
Yang Zhiqiang;Qu Zhiguo;Yang Haifeng;Zheng Wei(Minmetals Yingkou Medium Plate Co.,Ltd.,Yingkou Liaoning 115000)
出处
《山西冶金》
CAS
2019年第6期92-93,127,共3页
Shanxi Metallurgy
关键词
管线钢
控制轧制
终冷温度
针状铁素体
pipeline steel
controlled rolling
finishing cooling temperature
acicular ferrite
