低碳锰钢强韧化机制的研究  

Strengthening and Toughening Mechanism of Low Carbon Manganese Steels

作　　者：李龙[1] 唐正友[1] 丁桦[1] 杜林秀[2] 宋红梅[3] 张丕军[3] 

机构地区：[1]东北大学材料与冶金学院,辽宁沈阳110004 [2]东北大学轧制技术及连轧自动化国家重点实验室,辽宁沈阳110004 [3]宝钢集团公司技术中心,上海201900

出　　处：《金属热处理》2007年第11期15-18,共4页Heat Treatment of Metals

基　　金：国家自然科学基金(No.50271015);上海宝钢集团公司联合资助

摘　　要：在实验室对低碳锰钢进行了控轧控冷试验。利用光学显微镜和透射电子显微镜等测试手段,对试验结果进行了研究。结果表明,具有铁素体和贝氏体复相组织的低碳锰钢具有较高的强度和良好的韧性。贝氏体相变强化对低碳锰钢屈服强度的贡献可达30%,贝氏体铁素体板条的细化和铁素体亚晶的存在可以降低碳锰钢的脆性转变温度。具有铁素体和贝氏体复相组织的低碳锰钢除了固溶强化之外,主要强化机制为细晶强化和贝氏体相变强化。Controlled rolling and controlled cooling experiments under various technology parameters have been carried out on low carbon manganese steels.OM and TEM observations indicated that the good combination of strength and toughness could be gained for the steel with duplex microstructures of ferrite and bainite evenly distributed in the microstructure.The most contribution of bainite strengthening to the yield strength was about 30%.Fine bainite ferrite lath and the existence of sub-grain decreased the brittle transition temperature of the tested steel.Fine grain strengthening and bainite strengthening is the primary strengthening mechanism for the low carbon manganese steel with duplex microstructure as well as solution strengthening.

关 键 词：低碳锰钢 贝氏体 力学性能 强化机制 

分 类 号：TG142.1[一般工业技术—材料科学与工程]