卷取温度对Q960热轧薄钢板组织与性能的影响  

Effects of coiling temperature on microstructure and mechanical properties of hot rolled Q960 steel sheet

作　　者：王慎德[1] 曾斌[1,2] 李昭东[1,2] 张可[2,3] 肖爱达[1] 孙新军[2] 雍岐龙[2] 

机构地区：[1]湖南华菱涟源钢铁有限公司技术中心,湖南娄底417009 [2]钢铁研究总院工程用钢研究所,北京100081 [3]昆明理工大学材料科学与工程学院,云南昆明650093

出　　处：《金属热处理》2015年第3期155-159,共5页Heat Treatment of Metals

基　　金：国家自然科学基金(51201036);国家科技支撑计划项目(2013BAE07B05)

摘　　要：研究了中低温卷取温度对Q960热轧薄板钢显微组织和力学性能的影响。结果表明,随着卷取温度从562℃降至359℃,Q960热轧板的显微组织由粒状贝氏体+少量的珠光体转变为下贝氏体;渗碳体含量明显增加而MC相略有下降。低温或超低温卷取可以减轻或消除Q960热轧板的带状组织。采用非再结晶轧制和约350℃低温卷取可以使Q960热轧卷板获得1000 MPa以上的非比例延伸强度,同时冲击性能良好。Effects of coiling temperature in the medium-low temperature range on microstructure and mechanical properties of hot rolled Q 960 steel sheet were investigated .The results show that the microstructure of Q 960 hot rolled steel sheet changes from granular bainite plus a little pearlite to lower bainite when the coiling temperature decreased from 562℃to 359℃.The amount of cementite significantly increases but the amount of MC phase slightly decreases with the decreasing of coiling temperature .The banded structure of hot rolled Q 960 steel sheet could be relieved or eliminated by low or ultra-low temperature coiling .The hot rolled Q960 steel sheet with non-proportional extension strength more than 1000 MPa and fine toughness could be obtained by non-recrystallization rolling and low temperature coiling around 350℃.

关 键 词：Q960热轧板 卷取温度 组织 力学性能 

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