民用住宅建筑用420 MPa级高强耐候H型钢的开发  

Development of 420 MPa Grade High-strength Weather-resistant H Beam for Residential Building

作　　者：刘丽娟 卜向东[1] 宋振东[1] 惠治国[1] Liu Li-juan;Bu Xiang-dong;Song Zhen-dong;Hui Zhi-guo(Technical Center of Inner Mongolia Baotou Steel Union Co.,Ltd.,Baotou 014010,Inner Mongolia Autonomous Region,China)

机构地区：[1]内蒙古包钢钢联股份有限公司技术中心,内蒙古包头014010

出　　处：《包钢科技》2023年第2期45-49,共5页Science & Technology of Baotou Steel

摘　　要：文章根据民用住宅建筑用420 MPa级高强耐候H型钢技术要求进行了化学成分和生产工艺设计,并采用金相显微镜、透射电子显微镜(TEM)观察微观组织,通过室温力学性能测试、周期浸润腐蚀试验等对试验钢进行了性能研究。结果表明:试验钢在室温下冲击韧性波动较小,表现出良好的韧性。3种不同规格的试验钢的屈服强度均高于420 MPa,耐腐蚀性指数(I)在6.15~6.45之间,表现出良好的耐大气腐蚀性能。试验钢的显微组织主要由铁素体和珠光体组成,铁素体平均晶粒尺寸为25.73μm,晶粒内存在纳米级(Cu,Cr)C析出相。In this paper,the chemical composition and production process are designed according to the technical requirements of 420 MPa grade high-strength weather-resistant H beam for residential building as well as the performances of test steel are studied by observing the microstructure with metalloscope and transmission electron microscopy(TEM),room temperature mechanical properties and periodic immersion corrosion tests.The results showed that the fluctuation of impact toughness at room temperature for test steel was small and its toughness was good.The yield strength of three test steels with different specifications was higher than 420 MPa and corrosion resistance index(I)was 6.15~6.45,which showed good resistance to atmospheric corrosion.The microstructure of test steels was mainly consisted of ferrite and pearlite as well as the average grain size of ferrite was 25.73μm and there was nanoscale(Cu,Cr)C precipitated phases in grain.

关 键 词：H型钢 耐候钢 性能 

分 类 号：TG142.7[一般工业技术—材料科学与工程]