| X70管线钢韧-脆断裂转变研究 |
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| 引用本文： | 许雁,朱杰武,柳永宁,冯耀荣.X70管线钢韧-脆断裂转变研究[J].陕西理工学院学报(自然科学版),2004,20(3):7-10. |
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| 作者姓名： | 许雁 朱杰武 柳永宁 冯耀荣 |
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| 作者单位： | 1. 西安交通大学,金属材料强度国家重点实验室,陕西,西安,710049
2. 西安石油管材研究所,陕西,西安,710000 |
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| 基金项目： | 西安交通大学培植项目:"西部专项"子项目，超高碳钢超细化外理及组织性能研究。 |
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| 摘 要： | 在不同温度下研究了X70管线钢动态断裂韧度K1d,J1d和止裂韧度K1a以及夏氏V型缺口冲击韧度(CVN)。研究表明,断裂韧度受温度和加载速率的影响较为强烈;当温度由213K向193K逐渐降低而加载速率逐渐从0.01向1000mm/s增大时,断裂韧度逐渐减小;在恒温下,增大加载速率可以诱发韧-脆断裂转变,应引起足够重视。
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| 关 键 词： | 管线钢 断裂韧度 加载速度 韧—脆断裂转 |
| 文章编号： | 1002-3410(2004)03-0007-04 |
| 修稿时间： | 2004年5月25日 |
Ductile to brittle fracture transition of a pipe line steel X70 |
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| XU Yan,ZHU Jie-wu,LIU Yong-ning,FENG Yiao-rong veristy,Xi'an ,China,.Tubular Goods Research Center of CNPC,Xi'an,China.Ductile to brittle fracture transition of a pipe line steel X70[J].Journal of Shananxi University of Technology:Natural Science Edition,2004,20(3):7-10. |
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| Authors: | XU Yan ZHU Jie-wu LIU Yong-ning FENG Yiao-rong veristy Xi'an China Tubular Goods Research Center of CNPC Xi'an China |
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| Institution: | XU Yan~1,ZHU Jie-wu~1,LIU Yong-ning~1,FENG Yiao-rong~2 veristy,Xi'an 710049,China,2.Tubular Goods Research Center of CNPC,Xi'an,710065,China ) |
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| Abstract: | The fracture toughness K1d and J1d, arrest toughness K1a and Charpy V-notched impact tuoghness (CVN ) of a pipe line steel, X70, are studied at different temperatures. It is found that fracture toughness is strongly affected by temperature and loading rate. The fracture toughness decreases with decreasing temperature from 213 to193K and increases loading rate from0.01 to 1000mm/s. At constant temperatures, only increasing loading rate can induce the transition from ductile to brittle. It should be paid attention to it. |
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| Keywords: | pipeline steels fracture toughness loading rate ductile to brittle fracture transition |
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