| X100管线钢焊接接头强韧化研究 |
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| 引用本文： | 李继红,陈飞绸,郑雯,毕宗岳,张敏.X100管线钢焊接接头强韧化研究[J].兵器材料科学与工程,2013,36(1):18-21. |
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| 作者姓名： | 李继红 陈飞绸 郑雯 毕宗岳 张敏 |
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| 作者单位： | 西安理工大学焊接研究室,陕西西安,710048;西安理工大学焊接研究室,陕西西安710048;宝鸡石油钢管研究院,陕西宝鸡721008 |
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| 基金项目： | 国家自然科学基金资助项目，陕西省自然科学基金资助项目，陕西重点学科建设经费资助，西安市科技计划项目 |
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| 摘 要： | X100管线钢匹配其专用焊丝在不同热输入下进行埋弧焊接试验,获得的焊接接头焊缝区组织均为准多边形铁素体、无碳贝氏体的整合组织,区别在于相比例、大小、形态和分布的不同;焊接热输入为15.75 kJ/cm,焊接熔池场温度最适宜,焊缝区准多边形铁素体含量为70.5%,无碳化物贝氏体为28.8%,所得焊接接头强韧性最优异。研制渣系中MnO严格控制在8%最适宜;Al2O3控制在22%~28%,能起到有利脱渣的作用,不会增加焊缝氧含量和接头氧化物夹杂的含量。
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| 关 键 词： | X100管线钢 焊缝区 准多边形铁素体 无碳化物贝氏体 |
Toughening of X100 pipeline steel welded joints |
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| LI Jihong
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CHEN Feichou
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ZHENG Wen
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BI Zongyue
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ZHANG Min.Toughening of X100 pipeline steel welded joints[J].Ordnance Material Science and Engineering,2013,36(1):18-21. |
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| Authors: | LI Jihong CHEN Feichou ZHENG Wen BI Zongyue ZHANG Min |
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| Affiliation: | 1(1.Welding Research Department,Xi′an University of Technology,Xi′an 710048,China; 2.Baoji Research Institute of Petroleum Pipe,Baoji 721008,China) |
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| Abstract: | Submerged arc welding tests were carried out on X100 pipeline steels with its special wire by using different heat inputs.The microstructure of the welded zones consists of quasi-polygonal ferrite and carbide-free bainite.The difference lies in the ratio,size,shape and distribution of different phase.With welding heat input 15.75 kJ/cm,the temperature of weld pool field is most suitable,and the content of quasi-polygonal ferrite and carbide-free bainite of the welded zone is 70.5% and 28.8%,respectively,and the strength and toughess of the welded joints reaches the maximum.In slag system,the content of MnO should be strictly controlled in less than 8%;When the content of Al2O3 is between 22% and 28%,it is beneficial to deslagging,and does not increase the oxygen content and oxide inclusions of joint. |
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| Keywords: | X100 pipeline steel welded zone quasi-polygonal ferrite carbide-free bainite |
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