高扩孔型铁素体/贝氏体双相钢组织性能研究  

Microstructure and property of highly hole-expandable ferrite/bainite dual-phase steel

作　　者：谷海容[1] 张建[1] 杨兴亮[1] 刘永刚[1] 潘红波[1] 

机构地区：[1]马鞍山钢铁股份有限公司技术中心,安徽马鞍山243000

出　　处：《武汉科技大学学报》2011年第6期419-423,共5页Journal of Wuhan University of Science and Technology

基　　金：国家自然科学基金资助项目(51075267)

摘　　要：对540MPa级铁素体/贝氏体双相钢的组织性能进行分析研究。结果表明,试验钢的显微组织为85%左右的铁素体加上15%左右的贝氏体;铁素体晶粒尺寸细小,基体中有较高的位错密度和大量细小弥散的析出物;贝氏体在铁素体基体上分布均匀,以板条状为主,板条间分布有较多碳化物颗粒。通过合适的成分设计和控轧控冷手段获得的铁素体/贝氏体双相钢组织形态,可较好地保证材料所需的强度-拉伸凸缘性能匹配。The mechanical properties and microstructure of 540 MPa grade ferrite/bainite dual-phase steel were investigated.The results show that the tested steel is made up of about 85% ferrite and 15% bainite.The fine grain ferrite has high dislocation density and massive fine precipitates.The bainite is mainly lathy with many carbide articles and distributes among ferrite equably.This dual-phase microstructure obtained by appropriate chemical composition design and TMCP guarantees the required strength and stretch-flangeability of the material.

关 键 词：铁素体/贝氏体双相钢 组织 强度 拉伸凸缘 

分 类 号：TG142.1[一般工业技术—材料科学与工程]