终轧温度对高强度耐候钢Q450NQR1组织和性能的影响  

Influence of finishing rolling temperature on microstructure and properties of Q450NQR1 high strength weathering steel

作　　者：刘志勇[1,2] 陈吉清[2] 贺信莱[1] 杨善武[1] 胡敏[2] 宋育来[2] 

机构地区：[1]北京科技大学材料科学与工程学院,北京100083 [2]武汉钢铁集团公司研究院,湖北武汉430080

出　　处：《金属热处理》2009年第6期42-45,共4页Heat Treatment of Metals

摘　　要：通过金相显微镜、透射电镜观察和力学性能检测,研究了终轧温度对低合金高强度耐候钢Q450NQR1组织和性能的影响。结果表明,终轧温度控制在800～860℃之间,Q450NQR1钢可以得到良好的强韧匹配;对应的的显微组织为多边形铁素体+珠光体,铁素体基体上均匀分布着细小析出相。Influence of finishing rolling temperature Tf on the properties of Q450NQR1 high strength weathering steel was studied by means of optical microscope and transmission electron microscopy and mechanical properties test. The results show that good mechanical properties can be acquired at 800 - 860 ℃ （ Tf）, polygonal ferrite and pearlite are the base microstructure of Q450NQR1 steel, the disperse precipitates in fcrrite.

关 键 词：终轧温度 高强度耐候钢 组织与性能 

分 类 号：TG142.7[一般工业技术—材料科学与工程]