| 焊接热输入对X90管线钢CGHAZ组织和冲击性能的影响 |
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| 引用本文： | 王端军,付志斌,夏乾峰,范磊,陈英,王青峰.焊接热输入对X90管线钢CGHAZ组织和冲击性能的影响[J].天津冶金,2014(1):23-25. |
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| 作者姓名： | 王端军 付志斌 夏乾峰 范磊 陈英 王青峰 |
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| 作者单位： | [1]南京钢铁股份有限公司技术质量部,南京210035 [2]燕山大学亚稳材料制备技术与科学国家重点实验室,河北秦皇岛066004 |
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| 基金项目： | 国家高技术研究发展计划资助项目(2007AA03Z509) |
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| 摘 要： | 采用焊接热模拟技术、显微组织分析和冲击试验的方法,研究焊接线能量对X90管线钢粗晶热影响区组织和力学性能的影响规律。结果表明,不同线能量下试验钢的组织均为板条贝氏体(LBF)和粒状贝氏体(GBF),线能量为25 kJ/cm时,试验钢的组织主要为LBF,冲击功较高;随着焊接线能量的增加,GBF增加,晶粒粗化,韧性显著下降。
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| 关 键 词： | X管线钢 粗晶热影响区 线能量 显微组织 力学性能 |
Influence of Welding Heat Input on CGHAZ Structure and ImpactProperty of X90 Pipeline Steel |
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| WANG Duan-jun,FU Zhi-bin,XIA Qian-feng,FAN Lei,CHEN Ying,and WANG Qing-feng.Influence of Welding Heat Input on CGHAZ Structure and ImpactProperty of X90 Pipeline Steel[J].Tianjin Metallurgy,2014(1):23-25. |
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| Authors: | WANG Duan-jun FU Zhi-bin XIA Qian-feng FAN Lei CHEN Ying and WANG Qing-feng |
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| Affiliation: | 1.Technology and Quality Department of Nanjin Iron and Steel Shareholding Co., Ltd, Nanjing, JiangsuProvince 210035, China; 2.State Key Laboratory of Metastable Materials Science and Technology,Yanshan University, Qinhuangdao, Hebei Province 066004, China) |
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| Abstract: | The influential regularity of welding heat input on the microstructure and mechanical propertiesof coarse grain heat affected zone （CGHAZ） in X90 pipeline steel was studied by means of welding thermalsimulation technology, microstructure analysis and impact test. The results showed that the microstructure oftested steel with different heat input consisted of lath bainite and granular bainite. When the heat input was25kJ/cm, the microstructure was mainly lath bainite with high absorbed-in-fracture energy; with the increaseof heat input, there was a tendency of granular bainite increase with grain coarsened and toughness obviouslyreduced. |
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| Keywords: | X90 pipeline steel coarse grain heat affected zone heat input microstructure mechanicalproperty |
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