| 水冷壁管爆裂分析 |
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| 引用本文： | 余翔,郑志军,高岩.水冷壁管爆裂分析[J].理化检验(物理分册),2007,43(8):425-427. |
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| 作者姓名： | 余翔 郑志军 高岩 |
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| 作者单位： | 华南理工大学,机械工程学院,广州,510641;华南理工大学,机械工程学院,广州,510641;华南理工大学,机械工程学院,广州,510641 |
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| 摘 要： | 采用化学成分分析、金相组织检验和力学性能测定等方法对水冷壁管的爆管进行了综合分析.结果表明,爆口处的硬度明显高于基体的硬度;基体组织为铁素体 珠光体,没有明显球化现象,而爆口处的组织为铁素体 珠光体 贝氏体的亚温淬火组织.由此说明水冷壁管的爆裂主要是短时急剧过热造成材料的高温强度降低而开裂.
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| 关 键 词： | 水冷壁管 爆裂 短时过热 亚温淬火 |
| 文章编号： | 1001-4012（2007）08-0425-03 |
| 收稿时间： | 2007-04-06 |
| 修稿时间： | 2007-04-06 |
EXFOLIATION CRACKING ANALYSIS OF WATER-COOLING TUBE |
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| YU Xiang,ZHENG Zhi-jun,GAO Yan.EXFOLIATION CRACKING ANALYSIS OF WATER-COOLING TUBE[J].Physical Testing and Chemical Analysis Part A:Physical Testing,2007,43(8):425-427. |
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| Authors: | YU Xiang ZHENG Zhi-jun GAO Yan |
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| Affiliation: | School of Mechanical Engineering, South China University of Technology, Guangzhou 510641, China |
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| Abstract: | A comprehensive analysis which is based on chemical composition,optical microstructure,microhardness,tensile strength was made on the exfoliation cracking of water-cooling tube.The results showed that the hardness at the break was much higher than the hardness of matrix material.The matrix microstrucutre was made up of ferrite and pearlite which did not spheroidize obviously but the microstructure near break was made up of ferrite,pearlite and bainite which was the microstructure of sub-temperature quenching.The above results indicated that the exfoliation cracking of water-cooling tube was mainly caused by short-time sudden overheating which made the strength of the matrix material decrease dramasticaly and induced the exfoliation cracking of the tube. |
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| Keywords: | Water-cooling tube Exfoliation cracking Shorttime overheating Sub-temperature quenching |
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