| X60管线钢焊接过热区裂纹萌生和扩展特征的研究 |
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| 引用本文： | 高惠临 金时麟. X60管线钢焊接过热区裂纹萌生和扩展特征的研究[J]. 焊管, 1994, 17(3): 49-53,63 |
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| 作者姓名： | 高惠临 金时麟 |
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| 作者单位： | 西安石油学院，石油天然气总公司焊管研究所 |
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| 摘 要： | 本文通过程序控制的热模拟方法获得Ｘ６０管线钢焊接过热区组织，在对冲击载荷下裂纹萌生和扩展阶段的能量特征的分析中，发现Ｘ６０过热区在不同服役温度下具有四种典型的断裂类型。采用断口形态和裂纹行这跟踪观察的实验方法，观察了过热区在裂纹萌生和扩展阶段的力学特征和组织特征。在上述实验结果的基础上，采用塑性滑移线场理论，提出了Ｘ６０过热区在不同服役温度下的断裂机理。
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| 关 键 词： | 管线钢管 焊接 过热带 断裂 |
A Study on Crack Initiation and Propagation of the Over-Heated HAZ of X60 Steel |
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| Gao Huilin, Xin Xixian, Xu Xueli etc. A Study on Crack Initiation and Propagation of the Over-Heated HAZ of X60 Steel[J]. Welded Pipe and Tube, 1994, 17(3): 49-53,63 |
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| Authors: | Gao Huilin Xin Xixian Xu Xueli etc |
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| Affiliation: | Gao Huilin; Xin Xixian; Xu Xueli etc |
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| Abstract: | The over-heated HAZ of X60 steel was get with a weld thermal simulation test. It is found that there are four types of fracture according to energy characteristic of impact test under a series of temperature. Crack formation and development in over-heated HAZ were observed by section-metalicgraphic speciment of fracture. On the basis of above experiment, fracture mechanism of X60 over-heated HAZ was given using the theory of slip line field. |
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| Keywords: | linepipe welding over-heated HAZ fracture |
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