低碳低合金高强贝氏体钢的研究现状及进展  

Status and Development of Low Carbon Microalloying Bainitic High Strength Steel

作　　者：李大赵[1,2] 崔天燮[2] 王育田 付培茂 曹永禄[2] 孟传峰 

机构地区：[1]中北大学材料科学与工程学院,山西太原030051 [2]太原钢铁(集团)有限公司技术中心,山西太原030003

出　　处：《钢铁研究学报》2013年第11期1-5,共5页Journal of Iron and Steel Research

基　　金：国家自然科学基金资助项目(51201154)

摘　　要：利用贝氏体强化,可使低碳低合金钢获得高强度并兼备一定的塑性和韧性。而且通过控轧控冷技术可实现钢的组织和性能控制,在降低成本的同时也保证了焊接性,该类钢种具有广泛的开发和应用前景。但由于贝氏体转变的复杂性,具有900MPa以上屈服强度的贝氏体钢尚未在大生产中实现。因此,在对高强贝氏体钢中合金元素的作用进行了分析的基础上,比较了不同贝氏体形貌下的力学性能,总结了获取不同贝氏体形貌的制备工艺,最后提出了获取900MPa以上屈服强度和15%以上伸长率的高强高塑性贝氏体钢的目标微观组织特征。The low carbon and alloying steel can obtain higher strength, better plasticity and toughness by bainitic strengthening. And through thermal mechanical control processing （TMCP） technology, the properties and micro- structure of the steel could be controlled, so the low cost and high weldability can be ensured, thus, this steel grade process extensive prospect of development and application. But the bainitic steel with more than 900MPa yield strength has not produced through industrial-scale production for the complexity of bainite transformation. Therefore, the effect of microalloying elements was analyzed, mechanical properties of steel with various bainitic morphologies were compared, different preparing technologies applied to get bainite were summarized, and the characteristic destination microstructure of bainitic steel with yield strength of 900MPa and total elongation of 15% was presented.

关 键 词：微合金化 控轧控冷 贝氏体 微观组织 性能特征 

分 类 号：TG142.2[一般工业技术—材料科学与工程]