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| 常用压力容器钢断裂行为研究 | |
| 引用本文： | 李亚宁,董保胜,赵新伟,罗金恒,周根树,郑茂盛.常用压力容器钢断裂行为研究[J].机械工程材料,2006,30(4):70-72. |
| 作者姓名： | 李亚宁 董保胜 赵新伟 罗金恒 周根树 郑茂盛 |
| 作者单位： | 1. 西安交通大学材料科学与工程学院,陕西,西安,710049 2. 中国石油天然气集团公司管材研究所,陕西,西安,710065 3. 西安交通大学材料科学与工程学院,陕西,西安,710049;中国石油天然气集团公司管材研究所,陕西,西安,710065 |
| 摘 要： | 利用三点弯曲试验，测试了16MnR、20R和Q235B三种常用压力容器钢的断裂行为和断裂韧度，并用扫描电镜观察了试样的断口形貌。结果表明：三种材料常温下均呈现韧性断裂，所有试样断口均存在裂纹分层现象，其中以16MnR裂纹扩展区分层现象最不明显，而Q235B裂纹扩展区分层现象最明显；当裂纹扩展方向与分层方向不一致时，分层现象的存在阻止了裂纹的扩展，从而提高材料的强度与韧度。 |
| 关 键 词： | 压力容器用钢 断裂韧度 裂纹扩展区 |
| 文章编号： | 1000-3738（2006）04-0070-03 |
| 收稿时间： | 2005-01-24 |
| 修稿时间： | 2005-01-242005-05-28 |
Fracture Behaviors of Several Pressure Vessel Steels |
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| LI Ya-ning,DONG Bao-sheng,ZHAO Xin-wei,LUO Jin-heng,ZHOU Gen-shu,ZHENG Mao-sheng.Fracture Behaviors of Several Pressure Vessel Steels[J].Materials For Mechanical Engineering,2006,30(4):70-72. | |
| Authors: | LI Ya-ning DONG Bao-sheng ZHAO Xin-wei LUO Jin-heng ZHOU Gen-shu ZHENG Mao-sheng |
| Abstract: | The fracture toughness of 16MnR, 20R and Q235B steel specimens were investigated respectively using three-point-bending experiments, and the fracture surface morphology was observed by SEM. The three samples exhibited ductile rupture behavior at room temperature. Delaminating phenomenon was observed in fracture zone of the three samples, but the delaminating phenomenon of fracture of 16MnR steel was obscure, while that of Q235B steel was obvious. When the direction of crack delaminating phenomena was not consistent with the direction of crack propagation, the delaminating phenomena provided resistance to the crack propagation, which increases the strength and toughness properties of the samples. |
| Keywords: | pressure vessel steel fracture toughness crack extension zone |
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