TMCP工艺耐低温高韧性桥梁板Q420qE的开发  

DEVELOPMENT OF Q420qE BRIDGE PLATE WITH LOW TEMPERATURE RESISTANCE AND HIGH TOUGHNESS BY TMCP PROCESS

作　　者：冯俊鹏 成慧梅 张瑞超 Feng Junpeng;Cheng Huimei;Zhang Ruichao(HBIS Group Hansteel Company,Handan 056015,Hebei)

机构地区：[1]河钢集团邯郸公司,河北邯郸056015

出　　处：《河北冶金》2021年第10期62-65,71,共5页Hebei Metallurgy

摘　　要：采用低碳、低磷、超低硫以及微合金化的化学成分设计,结合洁净钢冶炼、高质量铸坯生产和优化的TMCP工艺过程控制,开发了15~40 mm耐低温强韧性高级别桥梁板Q420qE。经检测,其金相组织为针状铁素体+粒状贝氏体,晶粒细小组织均匀,具有良好的力学性能。Adopting the chemical composition design of low carbon,low phosphorus,ultra-low sulfur and micro-alloying,combined with clean steel smelting,high-quality billet production and optimized TMCP process control,the 15~40 mm high-grade bridge plate Q420qE with low temperature resistance and strong toughness was developed.The metallographic structure is acicular ferrite+granular bainite,with fine grains,uniform structure and good mechanical properties.

关 键 词：耐低温 桥梁钢 TMCP 晶粒 金相组织 力学性能 

分 类 号：TG142.1[一般工业技术—材料科学与工程]