抗低温冲击H型钢Q345E低碳钛微合金化试验研究  

Study on the Low-carbon and Ti-microalloying Experiment of H-beam Q345E with Low-temperature Impact Resistance

作　　者：郭伟达[1] 赵圣功[1] 张学民[1] 

机构地区：[1]炼钢厂

出　　处：《莱钢科技》2016年第5期17-19,共3页Laigang Science & Technology

摘　　要：莱钢炼钢厂采用铌镍硼微合金化生产的抗低温冲击H型钢Q345E易出现冲击性能波动,产品合格率较低。通过对生产工艺进行优化调整试验,尝试采用低碳钛微合金化,加强各工序工艺控制,稳定了钛回收率,夹杂物及晶粒度控制水平也有明显的改善,低温冲击功数值检测良好。The impact property fluctuation of Nb -Ni -B -microalloyed H-beam Q345E with low-temperature impact resistance easily appeared in the steelmaking plant of Laiwu steel, thus leading to a low qualified rate of products. Through tFle optimizing and adjusting tests for production process, including the using of low-carbon and Ti-mieroalloying and the control strengthening of each process, the recovery of titanium was stabilized, the control levels of inclusions and grain size were improved significantly, and the value testing status of low-temperature impact energy was good.

关 键 词：微合金化 冲击韧性 夹杂物 

分 类 号：TG162.9[金属学及工艺—热处理]