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| 锅炉钢架用高强度螺栓的延迟断裂 | |
| 引用本文： | 岳增武,胡新芳,刘青,王焕贞,蒒琦,秦献珍.锅炉钢架用高强度螺栓的延迟断裂[J].热力发电,2007,36(9):88-91. |
| 作者姓名： | 岳增武 胡新芳 刘青 王焕贞 蒒琦 秦献珍 |
| 作者单位： | 1. 山东大学,山东,济南,250061 2. 山东电力研究院,山东,济南,250002 3. 运河发电厂,山东,济宁,272003 |
| 摘 要： | 在某台锅炉钢架安装过程中30多根材质为20MnTiB的扭剪型高强度螺栓发生了断裂。经对这些螺栓进行宏观及微观断口分析、金相分析和显微硬度试验,并按照有关标准进行了螺栓的紧固轴力和楔负荷等试验,认为由于螺栓制造工艺不当造成显微组织及性能的不均匀,以及部分螺栓紧固轴力过高,从而诱发了螺栓的延迟断裂。对产生延迟断裂的原因进行了分析讨论。 |
| 关 键 词： | 锅炉 钢架 扭剪型 高强度螺栓 延迟断裂 氢 |
| 文章编号： | 1002-3364（2007）09-0088-04 |
DELAYED FRACTURE OF HIGH STRENGTH BOLTS ON STEEL STRUCTURE FOR BOILERS |
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| YUE Zeng-wu,HU Xin-fang,LIU Qing,WANG Huan-zhen,XUE Qi,QIN Xian-zhen.DELAYED FRACTURE OF HIGH STRENGTH BOLTS ON STEEL STRUCTURE FOR BOILERS[J].Thermal Power Generation,2007,36(9):88-91. | |
| Authors: | YUE Zeng-wu HU Xin-fang LIU Qing WANG Huan-zhen XUE Qi QIN Xian-zhen |
| Affiliation: | 1. Shandong university, Jinan 250061, shandong province, PRC 2. Shandong Electric Power Research Institute, Jinan 250002, shandong province, PRC 3. Yunhe power plant, Jining 272003, shandong province, PRC |
| Abstract: | More than 30 high strength bolts made of 20MnTiB had fractured during the assembling process.Through macro and micro fracture analysis,metallurgical analysis,and micrographic hardness test,as well as fastening axial force and wedge load tests of the bolts carried out according to related standards,it is believed that the non-uniformity of microstructure and performance was resul- ted from imperfect manufacture technology,and overhigh fastening axial force of some bolts may induce delayed fracture of the bolts. The causes leading to delayed fracture have been also analysed and discussed. |
| Keywords: | steel structure torsion-tangential type high strength bolt delayed fracture hydrogen |
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