汽车结构用590 MPa级高屈服强度钢的研制  

Development of 590 MPa grade high yield strength steel for automobile structure

作　　者：王科强[1] 刘仁东[1] 王旭[1] 郭金宇[1] 徐荣杰[1] 林利[1] 

机构地区：[1]鞍钢股份有限公司技术中心,辽宁鞍山114009

出　　处：《金属热处理》2015年第1期156-160,共5页Heat Treatment of Metals

摘　　要：为满足汽车轻量化要求,利用Nb、Ti微合金化元素的细晶强化和析出强化机理,并进行生产工艺参数的合理控制,开发研制了抗拉强度达590 MPa级的汽车结构用高屈服强度钢板。研究结果表明,该钢的组织为细晶铁素体、回火马氏体和少量贝氏体,在铁素体基体上分布有细小的析出相。性能检验结果和点焊、成形试验表明,该钢具有良好的力学性能、成形和焊接性能。In order to satisfy the light weighting of car body, the 590 MPa grade high yield strength steel for automobile structure was developed through fine-grain strengthening and Nb and Ti microalloying precipitation strengthening and the control of process parameters.The results show that the microstructure of this steel is fine grain ferrite, tempered martensite, a small amount of bainite and fine microalloy carbonitride particles precipitated in ferrite.The results of property tests, spot welding and form experiments indicate that this steel has a good mechanical property formability and weldability.

关 键 词：微合金化 屈服强度 组织性能 成形性 焊接 

分 类 号：TG142.1[一般工业技术—材料科学与工程]