汽车结构用590MPa级热轧双相钢的开发  

Development of 590MPa Dual-phase Hot Strip Steel for Automobile Structure

作　　者：董瑞峰[1] 孙丽钢[1] 刘哲[1] 刘彦春[2] 王国栋[2] 

机构地区：[1]包钢集团公司薄板坯连铸连轧厂 [2]东北大学轧制技术及连轧自动化国家重点实验室,辽宁沈阳110004

出　　处：《轧钢》2008年第1期9-12,共4页Steel Rolling

摘　　要：以低C-Mn钢为原料，在包钢薄板坯连铸连轧生产线上，采用层流冷却和超快速冷却工艺，开发出厚度为4～11mm的590MPa级热轧双相钢；组织为铁索体＋马氏体，马氏体体积分数为8％～12％；抗拉强度为590～620MPa，屈服强度为385～455MPa，断后总伸长率为30％～35％。试用于重型卡车的车轮轮辐，使用性能良好。An industrial experiment of developing 590MPa grade dual-phase hot strip steel using laminar cooling ＋ ultra-fast cooling technology on Baotou CSP line was introduced in the present work. The 4- 11mm thickness test dual-phase steel with C-Mn raw material was produced by using thin-slab continuous casting,continuous rolling,laminar cooling and ultra-fast cooling process. The microstructures of the test dual-phase steel are ferrite ＋ martensite. The volume fraction of martensite is 8 % - 12 %, the tensile strength is 590- 620MPa, the yield strength is 385-455MPa, the total elongation is 30% - 35%. The wheel disk of heave-duty truck with the good formability was made of the test dual-phase steel.

关 键 词：CSP生产线 热轧双相钢 层流冷却 超快速冷却 

分 类 号：TG335.11[金属学及工艺—金属压力加工]