论文部分内容阅读
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。
In the laboratory, Ti and Ti + Nb ultra-low carbon bake hardened steels were hot-rolled, cold-rolled and continuously annealed. The ultra-low carbon bake hardened cold-rolled steel sheets with two compositions were passed through a Gleeble-1500 thermal simulator Continuous annealing recrystallization regular study, and with a salt bath furnace continuous annealing simulation. The results show that for the Ti + Nb ultra-low carbon bake hardened steel, the continuous annealing temperature is 870 ℃, the annealing time is 60s, the best comprehensive performance, r value of 2.46, bake hardening value of 86.3MPa; Ti ultra-low carbon Bake hardened steel, then annealed at a temperature of 870 ℃, the annealing time of 90s good overall performance, r value of 2.17, bake hardening value of 55.9MPa. The recrystallization start and end temperatures of Ti ultra low carbon bake hardened steel are about 620 ℃ and 720 ℃, respectively. The recrystallization start and end temperatures of Ti + Nb ultra low carbon bake hardened steel are about 660 ℃ and 750 ℃, respectively.