焊后热处理温度对SWRH82B盘条电阻对焊接头组织与力学性能的影响
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摘要
为了提高SWRH82B盘条电阻对焊接头的性能,对SWRH82B盘条进行了电阻对焊和焊后热处理,分析了不同焊后热处理温度下的焊接接头组织、拉伸断口形貌和力学性能。结果显示,焊后热处理温度对焊接接头组织的粗大程度、铁素体和二次渗碳体的析出程度具有较大的影响。在合适的热处理温度下其焊接接头组织较细小均匀,铁素体和二次渗碳体的析出量小,塑性好。
In order to improve the performance of SWRH82 B wire rod resistance butt welding joint, the resistance butt welding and the post weld heat treatment of SWRH82 B wire rod were carried out, and the microstructure, tensile fracture morphologies and mechanical properties of the welded joints under different post weld heat treatment temperatures were analyzed. The results show that the post weld heat treatment temperature has a great influence on the coarse level of welded joint's microstructure and the precipitation degree of ferrite and secondary cementite. When the heat treatment temperature is appropriate,the microstructure of welded joint is fine and uniform, the precipitation amount of ferrite and secondary cementite is small, and the plasticity is good.
In order to improve the performance of SWRH82 B wire rod resistance butt welding joint, the resistance butt welding and the post weld heat treatment of SWRH82 B wire rod were carried out, and the microstructure, tensile fracture morphologies and mechanical properties of the welded joints under different post weld heat treatment temperatures were analyzed. The results show that the post weld heat treatment temperature has a great influence on the coarse level of welded joint's microstructure and the precipitation degree of ferrite and secondary cementite. When the heat treatment temperature is appropriate,the microstructure of welded joint is fine and uniform, the precipitation amount of ferrite and secondary cementite is small, and the plasticity is good.
引文
[1]徐忠良.大跨度桥梁缆索用SWRS82B热轧盘条的组织与钢丝扭转性能研究[D].南京:东南大学,2006.
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[6]曾凡勇,李养良,张德勤,等.热镀锌法提高B82Mn QL材料的抗拉强度研究[J].表面技术,2016,45(3):96-102.
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[10]杨辉.高碳钢盘条电阻对焊质量的影响因素分析[J].热加工工艺,2012,41(17):134-135.
[2]游胜意,周生根,汪训政.国产盘条生产桥梁缆索用镀锌钢丝的研究[J].金属制品,2007,33(2):19-22.
[3]陈瑞飞,徐本军,乌兰格日乐.SWRH82B钢热变形奥氏体动态再结晶规律及模型研究[J].内蒙古民族大学学报(自然科学版),2010,25(5):499-501.
[4]高长益,张毅,伍从应,等.SWRH82B线材的试制[J].金属制品,2010,36(4):76-79.
[5]王秉喜,任玉辉,郭大勇,等.SWRH82B盘条生产工艺及质量分析[J].金属制品,2009,35(5):49-52.
[6]曾凡勇,李养良,张德勤,等.热镀锌法提高B82Mn QL材料的抗拉强度研究[J].表面技术,2016,45(3):96-102.
[7]吴丰顺,张尧,刘志福,等.直流电阻对焊接口张开及纵向裂纹的形成机制[J].华中科技大学学报,200l,29(5):48-50.
[8]罗卫,大规格高碳盘条焊接断裂原因分析[J].金属制品,2004,30(2):31-33.
[9]孙智,江利,应鹏展,等.失效分析基础与应用[M].北京:机械工业出版社,2009.
[10]杨辉.高碳钢盘条电阻对焊质量的影响因素分析[J].热加工工艺,2012,41(17):134-135.