作　　者： ; ; ; ; ;

机构地区： 东北大学材料与冶金学院轧制技术及连轧自动化国家重点实验室

出　　处： 《轧钢》 2007年第2期6-9,共4页

摘　　要： 介绍了在包钢CSP线上应用超快速冷却工艺开发540MPa级热轧双相钢的工业试验概况;以0．07% C—1．20%Mn—0．15%Si钢为原料,采用薄板坯连铸连轧、层流冷却和超快速冷却工艺,得到厚6mm的热轧双相钢带;其微观组织为铁素体和马氏体,马氏体体积分数为12%,σ_b为555～565MPa,σ_s为335～355MPa,δ为31%～34%,σ_s/σ_b为0．59～0．64,n值为0．18,整卷带钢性能均匀,应用于重型卡车横梁,性能良好。 An industrial experiment of development 540MPa grade dual-phase hot strip steel by ultra-fast cooling technology on Baotou CSP line was introduced. The test dual-phase steel of 6mm thickness was produced by thin-slab continuous rolling and two stage cooling process,including of laminar and ultra-fast cooling; The mi- crostructures of the test dual-phase steel are ferrite and martensite, and the volume fraction of martensite is 12%. The mechanical properties of the test dual-phase steel are uniform with the tensile strength of 555- 565MPa, the yield strength of 335-355MPa, the total elongation of 31%-34%, the yield ratio of 0.59-0.64 and the n value of 0.18. The test dual-phase steel with good service performance has been used tentatively for making the beam and the tail-board of heave-duty truck.

关 键 词： 超快速冷却 热轧双相钢 薄板坯连铸连轧 屈强比 值

领　　域： [金属学及工艺] [一般工业技术] [金属学及工艺] [金属学及工艺] [金属学及工艺]