| Mg处理高钢级管线钢焊接热影响区晶内铁素体形核机制研究 |
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| 引用本文： | 赵辉,胡水平,武会宾,李太全,安航航. Mg处理高钢级管线钢焊接热影响区晶内铁素体形核机制研究[J]. 钢铁, 2010, 45(2) |
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| 作者姓名： | 赵辉 胡水平 武会宾 李太全 安航航 |
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| 作者单位： | 1. 北京科技大学高效轧制国家工程研究中心,北京,100083
2. 北京科技大学冶金与生态工程学院,北京,100083 |
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| 摘 要： | 采用热模拟技术,EBSD技术和透射电子显微镜对镁处理高钢级管线钢的焊接热影响区(HAZ)晶内铁素体(IGF)的形核现象和机制进行了试验研究。结果表明:镁处理钢中形成大量的Al、Ti、Mg复合氧化物夹杂,其颗粒大小为0.5~3μm。在粗晶热影响区(CGHAZ)中,含Mg复合氧化物具有促进晶内针状铁素体形核的能力。对Mg处理高钢级管线钢焊接热影响区晶内铁素体的形核机制进行了探讨。
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| 关 键 词： | 高钢级管线钢 镁处理 晶内铁素体 形核机制 |
Research on Mechanism of Nucleation of Intra-Granular Ferrite in Welding Heat Affected Zone of Magnesium Treated High-Grade Pipeline Steel |
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| ZHAO Hui,HU Shui-ping,WU Hui-bin,LI Tai-quan,AN Hang-hang. Research on Mechanism of Nucleation of Intra-Granular Ferrite in Welding Heat Affected Zone of Magnesium Treated High-Grade Pipeline Steel[J]. Iron & Steel, 2010, 45(2) |
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| Authors: | ZHAO Hui HU Shui-ping WU Hui-bin LI Tai-quan AN Hang-hang |
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| Affiliation: | 1.National Engineering Research Center for Advanced Rolling Technology;University of Science and Technology Beijing;Beijing 100083;China;2.Metallurgical and Ecological Engineering School;China |
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| Abstract: | The phenomena and mechanism of nucleation of intra-granular ferrite in welding heat affected zone of Mg treated high-grade pipeline steel was studied by using thermal simulation, EBSD and transmission electron micro-scope. The results indicate that the inclusions in Mg treated steel are Al, Ti, Mg composite oxides with size in the range of 0.5-3 μm. Mg composite oxides could promote the formation of acicular ferrite in coarse grain heat affected zone. The nucleation mechanisms of intra-granular ferrite in Mg treated high-grade pipeline steel was discussed. |
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| Keywords: | high-grade pipeline steel Mg treatment intra-granular ferrite mechanism of nucleation |
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