| Influence of cooling conditions on XT0 pipeline steel in-service welding HAZ |
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| 引用本文： | 靳海成 王勇 韩彬 陈玉华. Influence of cooling conditions on XT0 pipeline steel in-service welding HAZ[J]. 中国焊接, 2006, 15(2): 68-72 |
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| 作者姓名： | 靳海成 王勇 韩彬 陈玉华 |
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| 作者单位： | College of Mechanical and Electronic Engineering, China University of Petroleum,Dongying,257061 |
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| 摘 要： | The chamber device was designed and set up to simulate the in-service welding. The results show ： the t8/5 , t8/3 and inner wall peak temperature Tp decrease with the cooling rate increases. The welding energy is carried off by flowing medium, the cooling rate increases, and many unbalanced microstructures such as granular bainite, martensite and M-A generate ; it worsens the properties of HAZ. Under air-cooling, the cooling rate is slow, the austenite grain grows obviously, the lath ferrite crosses the whole austenite, and it causes the hardness value is also big. The change of HAZ width is not obvious with the increase of cooling rate; and burn-through is not susceptible to the cooling rate. The quench microstructures increase and the hydrogen does not outflow from the HAZ easily when increase the cooling rate, so the susceptibility of hydrogen cracking increases.
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| 关 键 词： | 焊接 热影响区 X70管线钢 显微结构 机械性能 冷却条件 |
Influence of cooling conditions on XT0 pipeline steel in-service welding HAZ |
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| Jin Haicheng, Wang Yong, Han Bin ,Chen Yuhua. Influence of cooling conditions on XT0 pipeline steel in-service welding HAZ[J]. China Welding, 2006, 15(2): 68-72 |
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| Authors: | Jin Haicheng Wang Yong Han Bin Chen Yuhua |
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| Abstract: | |
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| Keywords: | in-service welding X70 pipeline steel heat-affected zone microstructure properties |
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