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| X100管线钢焊接热影响区组织与韧性研究 | |
| 引用本文： | 乔桂英,李建龙,李建一,田鹏,谷雨,廖波.X100管线钢焊接热影响区组织与韧性研究[J].燕山大学学报,2011,35(6):528-532. |
| 作者姓名： | 乔桂英 李建龙 李建一 田鹏 谷雨 廖波 |
| 作者单位： | 1. 燕山大学环境与化学工程学院,河北秦皇岛,066004 2. 中国石油集团渤海石油装备制造有限公司,河北青县,062658 3. 燕山大学材料科学与工程学院,河北秦皇岛,066004 |
| 基金项目： | 河北省自然科学基金资助项目 |
| 摘 要： | 采用热模拟试验技术,研究了X100管线钢焊接热影响区的组织与性能变化规律,结果表明:采用高Nb、微Ti设计的低碳X100管线钢的焊接粗晶区经焊接热循环后仍保持良好的韧性。焊接热影响区的脆化区出现在峰值温度为750℃的两相区。沿原奥氏体晶界形成的岛状组织是导致韧性降低的主要原因。 |
| 关 键 词： | X100管线钢 焊接热影响区 模拟 组织 性能 |
Research on microstructure and impact toughness of welding heat affected zone of X100 pipeline steel |
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| QIAO Gui-ying,LI Jian-long,LI Jian-yi,TIAN Peng,GU Yu,LIAO Bo.Research on microstructure and impact toughness of welding heat affected zone of X100 pipeline steel[J].Journal of Yanshan University,2011,35(6):528-532. | |
| Authors: | QIAO Gui-ying LI Jian-long LI Jian-yi TIAN Peng GU Yu LIAO Bo |
| Institution: | 1(1.College of Environmental and Chemical Engineering,Yanshan University,Qinhuangdao,Hebei 066004,China;2.CNPC Bohai Equipment Manufacturing Co.Ltd.,Qingxian,Hebei 062658,China;3.College of Materials Science and Engineering,Yanshan University,Qinhuangdao,Hebei 066004,China) |
| Abstract: | The microstructures and mechanical properties of the welding heat affected zone(HAZ) of X100 pipeline steels are studied by means of a thermal simulation technique.The results show that the coarse grain HAZs of the X100 pipeline steels with high-Nb and low Ti have higher toughness after welding thermal cycles.The embrittlement region appeared in two-phase field in HAZ when the peak temperature is 750 ℃.The island-like structure distributed along proceding austenite grain boundary mainly explain the decrease of toughness. |
| Keywords: | X100 pipeline steel welding HAZ simulation macrostructure property |
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