高层建筑用Q420GJC钢的研制及应用  

Development and Application of the High-rise Buildings Steel Q420GJC

作　　者：张开广[1] 童明伟[1] 陈颜堂[1] 范巍[1] 郑静[1] 

机构地区：[1]武汉钢铁(集团)公司研究院,湖北武汉430080

出　　处：《山东冶金》2015年第1期6-8,10,共4页Shandong Metallurgy

摘　　要：利用Nb、Ti等元素微合金化,配合控轧控冷工艺,开发了低屈强比、高强度Q420GJC钢。对其工业性试制钢板进行了拉伸、冲击、组织结构检验及焊接性能试验,结果显示,研制的钢种组织为铁素体+珠光体且铁素体比例占50%以上,具有优良的综合性能,屈强比≤0.81,Rm≥560 MPa,满足高层建筑用钢技术要求,已成功实现工程应用。The new high-rise buildings steel Q420GJC with low yield/tension ratio and high strength were developed using Nb-Ti microalloying as well as controlled rolling and cooling process. The performances of the tensile, impact, microstructure and welding of the steel were tested. The results showed that the microstructure of the steel is composed of more than 50% ferrite and pearlite, the steel has excellent comprehensive properties： the yield/tension ratio is less than 0,81, the Rm is more than 560 MPa and can meet the requirements of high-rise buildings structure steel. The steel has been successfully implemented in engineering.

关 键 词：高层建筑用钢 Q420GJC 性能 金相组织 屈强比 

分 类 号：TG335.5[金属学及工艺—金属压力加工] TG142.1[一般工业技术—材料科学与工程]