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| Weldability and SAW welding wire of X80 pipeline steel | |
| 作者姓名： | 黄治军 胡伦骥 缪凯 张小枫 陈浮 |
| 作者单位： | [1]Huazhong University of Science and Technology, Wuhan, 430074. [2]Wuhan Iron and Steel （Group） Corporation, Wuhan, 430080. |
| 基金项目： | The authors wish to express their gratitude to the experts in pipeline steel research team in Technology Center of Wuhan Iron and Steel （Group） Corporation （WISC0） for their help. |
| 摘 要： | 0IntroductionWith the rapid development of oil and gas industry,the pipeline construction is in the ascendant in China.Forconsideration of cost and safety,the strength of pipelinesteel and the working pressure of pipeline have been great-ly increased.In the previous pipeline projects X65steelwas used and now West-to-East Transportation Project forexample is mainly using X70steel,and X80steel hasdrawn great attention and is expected to be employed insome trial pipelines in the future.Steel … |
| 关 键 词： | 焊接性 焊条 机械性能 针状铁素体 贝氏体 管线钢 |
Weldability and SAW welding wire of X80 pipeline steel |
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| Huang Zhijun,Hu Lunji,Miao Kai,Zhang Xiaofeng,Chen Fu.Weldability and SAW welding wire of X80 pipeline steel[J].China Welding,2006,15(1):74-80. | |
| Authors: | Huang Zhijun Hu Lunji Miao Kai Zhang Xiaofeng Chen Fu |
| Affiliation: | 1. Huazhong University of Science and Technology, Wuhan, 430074;Wuhan Iron and Steel Group Corporation, Wuhan, 430080 2. Huazhong University of Science and Technology, Wuhan, 430074 3. Wuhan Iron and Steel Group Corporation, Wuhan, 430080 |
| Abstract: | Weldability test was carried out on the newly developed fine grain, low sulphur, high strength and high toughness pipeline steel of X80 and its matching SAW wire. Test of maximum hardness in welding heat-affected zone and test of Y groove cracking show that X80 steel features low hardenability and good cracking resistance. The submerged arc welding joint made with the newly developed low carbon and multi-alloyed SAW wire of WGX2 exhibits a little higher strength than the base metal, qualified bending performance, under maximum limitation hardness and good impact toughness, which can completely meet the technical requirement of X80 steel. Despite somewhat coarsening the grain size in welding heat-affected zone is still much finer than that of traditional steels, and the microstructure in weld metal is almost full acicular ferrite. The results show that X80 steel and WGX2 wire are of great weldability. |
| Keywords: | X80 weldability welding wire mechanical properties acicular ferrite bainite |
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