TMCP工艺对Q420qENH钢屈强比和NDT性能的影响  

Effect of TMCP Process on Yield Ratio of Steel Q420qENH and NDT Performance

作　　者：张动 

机构地区：[1]宽厚板厂

出　　处：《南钢科技与管理》2016年第2期12-15,共4页NISCO Technology and Management

摘　　要：随着公铁钢桥用钢强度级别的提高,对桥梁钢的强韧性、屈强比和断裂韧性指标NDT温度提出了更高的要求。本文介绍了低屈强比、低NDT温度耐候桥梁钢Q420q ENH的TMCP控制要点,重点介绍了二阶段压缩比和两相区冷却对试验钢屈强比和NDT温度的影响,提出了控制方案。With the steel grade improving in highway and railway bridge steel, the requirements for toughness, yield - strength ratio and fracture toughness index of NDT temperature in steel are proposed. The paper introduces the TMCP control points in weathering Q420qENH bridge steel with the low yield -strength ratio and low NDT temperature, focusing on effects of two - stage variable compression ratio and two - phase cooling on yield - strength ratio of test steel and NDT temperature. The control scheme is proposed.

关 键 词：高性能桥梁钢 铁素体晶粒尺寸 低屈强比 低NDT温度 

分 类 号：TF704.2[冶金工程—钢铁冶金]