| 进口B70级直缝焊管冷弯试验开裂分析 |
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| 引用本文： | 朱锦波,傅志强,姚久红. 进口B70级直缝焊管冷弯试验开裂分析[J]. 理化检验(物理分册), 2009, 45(6): 361-363 |
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| 作者姓名： | 朱锦波 傅志强 姚久红 |
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| 作者单位： | 天津出入境检验检疫局,天津,300201 |
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| 摘 要： | 对在冷弯试验中焊缝开裂的进1：2B70级直缝焊管进行了金相检验、焊缝断口形貌分析以及夹杂物成分分析。结果表明：焊缝中分布在铁素体晶界上的渗碳体以及焊缝中存在的夹杂物和气孔是导致冷弯试验中发生开裂的主要原因。
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| 关 键 词： | 夹杂物 气孔 渗碳体 |
Cracking Analysis of Importation B70 Grade Line Welding Pipe in Cold-bend Test |
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| ZHU Jin-bo,FU Zhi-qiang,YAO Jiu-hong. Cracking Analysis of Importation B70 Grade Line Welding Pipe in Cold-bend Test[J]. Physical Testing and Chemical Analysis Part A:Physical Testing, 2009, 45(6): 361-363 |
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| Authors: | ZHU Jin-bo FU Zhi-qiang YAO Jiu-hong |
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| Affiliation: | Tianjin Entry-exit Inspection and Quarantine Bureau;Tianjin 300201;China |
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| Abstract: | Metallurgical analysis,fracture analysis and chemical composition analysis were carried out on the B70 grade line welding pipe which cracked during the cold bending test.The results showed that network cementite distributing along the boundary of ferrite grains,inclusions and gas porosities caused the cracking of pipe during the cold bending test. |
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| Keywords: | inclusion gas porosity cementite |
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