低碳高强贝氏体钢的研究现状

Research status of low carbon high strength bainitic steel

概述了近些年低碳硅锰系贝氏体钢的国内外研究现状,介绍了贝氏体相变机制及形成过程;并通过分析合金元素对低碳硅锰系贝氏体钢组织与性能的影响,论述了在双相区保温过程中合金元素Mn的配分行为,揭示了低碳高强贝氏体钢的强化机制;最后详细阐述了低碳高强贝氏体钢的工艺、组织、性能三者的相互关系,重点介绍了几种能获得屈服强度与伸长率分别高于1 000MPa、15%的制备工艺,并在此基础上展望了低碳高强贝氏体钢的主要研究方向。

The research status of low carbon Si-Mn bainitic steel at home and abroad in recent years was summarized.The mechanism of bainite transformation and the formation process were introduced.By analyzing the effects of alloying elements on the properties and microstructure of low carbon Si-Mn bainitic steel,the partitioning behavior of alloying element Mn in the process of dual phase insulation was discussed and the strengthening mechanism of low carbon bainitic steel was revealed.Finally,the relationship between the technology,organization and properties of low carbon high strength bainitic steel was elaborated and several kinds of preparation techniques which can obtain yield strength and elongation higher than 1 000 MPa and 15% respectively were introduced.On this basis,the main research directions of low carbon high strength bainitic steels were prospected.