超低碳微合金管线钢焊接接头的组织与冲击性能
Microstructure and Impact Property of Welding Joints of Ultra Low-Carbon Micro-Alloyed Pipeline Steel
摘 要
利用光学显微镜、冲击试验机及扫描电镜等对超低碳微合金管线钢焊接接头的组织及冲击性能的进行了研究。结果表明: 超低碳微合金管线钢母材组织主要由粒状贝氏体和贝氏体铁素体组成, 接头的粗晶热影响区组织为贝氏体铁素体、粒状贝氏体和少量的多边形铁素体及细小的M-A岛, 且晶粒粗大, 焊缝中的针状铁素体以钛、铝、硅、锰的复合氧化物诱发形核, 并以筐篮的编织结构相互交错分布; 在-10 ℃时此接头的冲击功可达178 J, 表现为韧性断裂。
焊接接头
组织
韧性
pipeline steel
welding joint
microstructure
toughness
Abstract
Using optical microscopy, impact test and scanning electron microscopy, the microstructure and toughness of welding joints of an ultra low-carbon micro-alloyed pipeline steel were studied. The results show that the microstructure of the ultra low-carbon micro-alloyed pipeline steel mainly consists of granular bainite and bainite ferrite. The coarse grained region of heat-affected zone is composed of bainite ferrite, granular bainite, a small amount of polygon ferrite and fine M-A island, and the grains are obviously coarse. The nucleation of acicular ferrites in weld line is induced by composite oxides containing Ti, Al, Si and Mn, and the acicular ferrites distribute as interlaced basket woven structure. The impact energy of the joints was 198 J at -10 ℃. And the fracture mode of the joints in impacting is ductile fracture.
中图分类号 TG113
所属栏目 材料性能及其应用
基金项目 国家自然科学基金资助项目(51274162); 陕西省自然科学基金资助项目(2012JM6003); 陕西省重点学科建设经费资助项目
收稿日期 2013/3/27
修改稿日期 2014/2/7
网络出版日期
作者单位点击查看
备注李继红(1973-), 男, 河南洛阳人, 讲师, 博士。
引用该论文: LI Ji-hong,YANG Liang,ZHANG Xing-xuan,ZHANG Min. Microstructure and Impact Property of Welding Joints of Ultra Low-Carbon Micro-Alloyed Pipeline Steel[J]. Materials for mechancial engineering, 2014, 38(6): 75～78
李继红,杨亮,张兴璇,张敏. 超低碳微合金管线钢焊接接头的组织与冲击性能[J]. 机械工程材料, 2014, 38(6): 75～78
被引情况:
【1】惠亚军,李文远,潘 辉,刘 锟,陈 斌,崔 阳,吴科敏, "闪光对焊焊接380CL钢轮辋焊缝开裂原因分析",机械工程材料 40, 100-103(2016)
【2】隋志强,齐彦昌,王军丽,马成勇, "焊接工艺对DH36耐蚀船板钢焊缝金属组织与耐蚀性能的影响",机械工程材料 40, 61-65(2016)
【3】李继红,芦晓康,任晓龙,张敏, "焊接热输入对自保护药芯焊丝焊接X80管线钢接头组织和性能的影响",机械工程材料 40, 61-64(2016)
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参考文献
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【5】TANGUYA B, LUU T T, PERRIN G, et al. Plastic and damage behavior of a high strength X100 pipeline steel: experiments and modeling［J］.International Journal of Pressure Vessels and Piping,2008,85(5): 322-335.
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