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| X70管线钢焊接热影响区组织和韧性研究 | |
| 引用本文： | 陈小伟,田鹏,闻康,李志华,肖福仁,王旭,廖波. X70管线钢焊接热影响区组织和韧性研究[J]. 热加工工艺, 2007, 36(11): 6-9 |
| 作者姓名： | 陈小伟 田鹏 闻康 李志华 肖福仁 王旭 廖波 |
| 作者单位： | 1. 燕山大学材料学院,河北,秦皇岛,066004;华北石油管理局第一机械厂,河北,青县,062658 2. 华北石油管理局第一机械厂,河北,青县,062658 3. 燕山大学材料学院,河北,秦皇岛,066004 |
| 摘 要： | 通过焊接热模拟的方法，研究了焊接线能量对X70管线钢焊接热影响区组织和低温韧性的影响。结果表明，在25kJ／cm的焊接线能量下，热影响区粗晶区的组织发生粗化，韧性显著降低；随着焊接线能量增加，低温韧性进一步恶化。然而，焊接线能量对细晶区的组织和低温韧性影响不大，在60kJ／cm的大焊接线能量下．细晶区仍能获得优良的低温韧性。 |
| 关 键 词： | X70管线钢 热影响区 焊接线能量 低温韧性 |
| 文章编号： | 1001-3814（2007）01-0006-03 |
| 修稿时间： | 2007-03-30 |
Study on Microstructure and Toughness of Heat-affected Zone of X70 Pipeline Steel |
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| CHEN Xiao-wei,TIAN Peng,WEN Kang,LI Zhi-hua,XIAO Fu-ren,WANG Xu,LIAO Bo. Study on Microstructure and Toughness of Heat-affected Zone of X70 Pipeline Steel[J]. Hot Working Technology, 2007, 36(11): 6-9 | |
| Authors: | CHEN Xiao-wei TIAN Peng WEN Kang LI Zhi-hua XIAO Fu-ren WANG Xu LIAO Bo |
| Affiliation: | 1. Material College of Yanshan University, Qinhuangdao 066004,China,. 2. First Machinery Works of North China Petroleum, Qing County 062658,China |
| Abstract: | The effect of welding line energy on microstructure and low temperature toughness of heat-affected zone(HAZ) of X70 pipeline steel was studied by welding thermal simulation method.The results show that the microstructure of the coarse grains zone in heat-affected zone coarsens,and the low temperature toughness reduces obviously under welding line energy of 25kJ/cm,and the toughness gets worse with the increase of welding line energy.However,welding line energy has little effect on microstructure and low temperature toughness of fine grain zone,and the excellent low temperature toughness can be obtained under high welding line energy of 60kJ/cm. |
| Keywords: | X70 pipeline steel heat-affected zone welding line energy low temperature toughness |
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