不锈钢高强度螺栓机械性能与施拧方法试验研究

张天雄; 王元清; 陈志华; 卜宜都; 何伟; 衡月昆

doi:10.13204/j.gyjzG22050303

不锈钢高强度螺栓机械性能与施拧方法试验研究

doi: 10.13204/j.gyjzG22050303

1. 天津大学建筑工程学院, 天津 300072;
2. 清华大学土木工程安全与耐久教育部重点实验室, 北京 100084;
3. 北京工业大学土木工程系, 北京 100124;
4. 中国科学院高能物理研究所, 北京 100049

基金项目:

国家自然科学基金（国家重大科研仪器研制项目12127808）；清华大学自主科研计划课题（学科交叉专项20131089288）。

详细信息

作者简介:
张天雄,男,1992年出生,博士研究生。

通讯作者:
王元清,男,1963年出生,博士,教授,wang-yq@mail.tsinghua.edu.cn。

计量
- 文章访问数: 115
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- 被引次数: 0
出版历程
- 收稿日期: 2022-05-03
- 网络出版日期: 2022-10-28

Experimental Research on Mechanical Properties and Tightening Methods of Stainless Steel High-Strength Bolts

1. School of Civil Engineering, Tianjin University, Tianjin 300072, China;
2. Key Laboratory of Civil Engineering Safety and Durability of Ministry of Education, Tsinghua University, Beijing 100084, China;
3. Department of Civil Engineering, Beijing University of Technology, Beijing 100124, China;
4. Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China

摘要

摘要: 目前，国内外有关不锈钢高强度螺栓的研究较少，且螺栓产品规格缺乏统一标准。为研究不锈钢高强度螺栓的机械性能与施拧方法，对两种新型10.9级不锈钢高强度螺栓开展了实物拉伸试验、硬度试验及紧固性能试验，获得了螺栓的抗拉强度、硬度等重要指标，确定了不锈钢高强度螺栓的预紧力与施拧工艺。结果表明：两种不锈钢高强度螺栓均满足10.9级高强度螺栓机械性能的要求；不锈钢螺栓在紧固过程中会发生咬死现象，润滑剂Molykote D-321R对不锈钢螺栓咬死的减摩润滑效果最好，可使不锈钢高强度螺栓的扭矩系数降低至钢结构用高强度螺栓扭矩系数的限值；对于扭矩法与转角法两种施加螺栓预紧力的方法，扭矩法得到的螺栓预紧力一致性更高；并提出了不锈钢高强度螺栓施工预紧力的要求，进而给出了其施工扭矩，为工程应用提供参考。
- 不锈钢 /
- 高强度螺栓 /
- 机械性能 /
- 咬死 /
- 扭矩系数 /
- 转角法
Abstract: There are few researches on stainless steel high strength bolts worldwide, and there is a lack of uniform standards for bolt product specifications. In order to study the mechanical properties and tightening methods of stainless steel high strength bolts, physical tensile tests, hardness tests and tightening tests were carried out on two kinds of 10.9 grade stainless steel high-strength bolts. The tensile strength and hardness were obtained. The preload and tightening process were determined. The results showed that the two kinds of stainless steel high-strength bolts met the requirements of mechanical properties of grade 10.9 high-strength bolts. The thread galling of stainless steel bolts occurred during the tightening process. The lubricant Molykote D-321R had the best friction reduction effect on the galling and could reduce the torque coefficient of stainless steel high-strength bolts to the limit of torque coefficients of the high-strength bolts for steel structures. For the two methods of applying bolt preload, the torque method and the rotation angle method, the bolt preload obtained by the torque method was more consistent. The requirements for the construction preload of stainless steel high-strength bolts were proposed, and the construction torque was given to provide a reference for engineering application.
- stainless steel /
- high-strength bolt /
- mechanical properties /
- galling /
- torque coefficient /
- rotation angle method

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