ADB610D钢回火试验研究.pdfVIP

ADB610D 钢回火试验研究 1 2 1 3 1 1 梁福鸿 张禄林 王 旭 丛津功 徐荣杰 胡昕明 （1.鞍钢股份有限公司技术中心，鞍山 114009 2.鞍钢股份有限公司产品制造部，鞍山 114021 3.鞍钢股份有限公司中厚板厂，鞍山 114042 ） 摘 要 试验钢板是用ADB610D 连铸坯经过再结晶区和未再结晶区控制轧制并进行控制冷却得到的 55mm 厚度钢 板,采用不同温度进行回火。检验了热处理前后力学性能，对比分析了热处理前后金相组织变化特点，对比了不同 温度回火状态下析出物特征。结果表明，TMCP 态钢板经过 500~750℃回火后总体表现抗拉强度随回火温度的升高 而逐渐下降的趋势；TMCP 态钢板厚度 1/4 处组织为铁素体+M/A+少量板条贝氏体，经 610℃以上回火后贝氏体板 条宽度增加，并有板条束合并现象，680 ℃回火后贝氏体板条束几乎全部消失，转变为准多边形铁素体+M/A ； 570℃、610℃、650℃回火后发现不同形态和尺寸的TiNbCN、NbVC 析出物。1 关键词 力学性能 M/A 板条贝氏体 析出物 Experimental Study on ADB610D Steel about Tempering Liang Fuhong1 Wang Xu2 Cong Jingong3 Xu Rongjie1 Hu Xinming1 （1．Technology Center of Ansteel Co.,Ltd.,Anshan,114009 ; 2.Product Manufacturing Department of Ansteel Co.,Ltd., Anshan,114021; 3.Medium Heavy Plant of Ansteel Co.,Ltd.,Anshan,114042 ） Abstract The test steel plates were the 55mm thick ones that be rolled in the austenite recrystallization region and non recrystallization region and they were cooled down in water after last pass,then were tempered at different temperature.The mechanical properties before and after tempering were tested and its microstructures were compared.The educts at different temper temperature were compared also.The results indicate that tensile strength is decreasing with the increase of the tempering temperature after the TMCP steel plates were tempered. The microstructure of TMCP plate in 1/4 thickess was ferrite +M/A+little lath-shaped bainite. The bainitic lath would be coursing and merging when the TMCP steel plates were tempered at 610 ℃ above and almos