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.
出处
《轧钢》
2008年第1期9-12,共4页
Steel Rolling
关键词
CSP生产线
热轧双相钢
层流冷却
超快速冷却
CSP line
hot rolled dual-phase steel strip
laminar cooling
ultra-fast cooling
