Ti和Ti+Nb处理的超低碳烘烤硬化钢连续退火研究  

Continuous annealing of Ti and Ti+Nb bearing ultra-low carbon bake hardening steels

作　　者：陈继平[1] 康永林[1] 郝英敏[1] 刘光明[1,2] 熊爱明[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]首钢技术研究院,北京100041

出　　处：《金属热处理》2009年第9期52-58,共7页Heat Treatment of Metals

基　　金：国家"十一五"科技支撑计划项目(2006BAE03A13)

摘　　要：在实验室进行了Ti和Ti+Nb处理的超低碳烘烤硬化钢热轧、冷轧和连续退火实验,对两种成分的超低碳烘烤硬化冷轧钢板通过Gleeble-1500热模拟机进行连续退火再结晶规律的研究,并用盐浴炉进行了连续退火模拟。结果表明,对于Ti+Nb超低碳烘烤硬化钢,连续退火温度为870℃,退火时间为60s时综合性能最好,r值为2.46,烘烤硬化值为86.3MPa;对于Ti超低碳烘烤硬化钢,则在退火温度为870℃,退火时间为90s时综合性能较好,r值为2.17,烘烤硬化值为55.9MPa。Ti超低碳烘烤硬化钢的再结晶开始和结束温度分别在620℃和720℃左右,Ti+Nb超低碳烘烤硬化钢的再结晶开始和结束温度分别在660℃和750℃左右。Hot rolling, cold rolling and continuous annealing of Ti bearing and Ti ＋ Nb stabilized ultra-low carbon bake hardening steels were experimentally studied. The recrystallization law of the two ultra-low carbon bake hardening steels during continuous annealing were obtained through Gleeble-1500 thermal simulator. The continuous annealing processes of two ultra-low carbon bake hardening steels were also simulated using salt bath furnace. The results show that excellent combined properties are obtained at 870 ℃ and soaked for 60 s for Ti ＋ Nb stabilized ultra-low carbon bake hardening steel, the r value is 2. 46 and bake-hardening value is 86. 3 MPa. For Ti bearing ultra-low carbon bake hardening steel,superior combined properties are obtained at 870 ℃ and soaked for 90 s,the r value is 2. 17 and BH value is 55.9 MPa. The recrystallization during continuous annealing for Ti bearing ultra-low carbon bake hardening steel starts and completes at approximately 620 ℃ and 720 ℃, respectively. For Ti ＋ Nb stabilized ultra-low carbon bake hardening steel,the recrystallization during continuous annealing starts and completes at approximately 660℃ and 750 ℃ ,respectively.

关 键 词：超低碳钢 烘烤硬化钢 连续退火 组织性能 

分 类 号：TG142.45[一般工业技术—材料科学与工程] TG156.25[金属学及工艺—金属材料]