CAUSE ANALYSIS OF RUPTURE FAILURE FOR HIGH STRENGTH BOLTS USED FOR JOINTING STEEL STRUCTURE OF BOILERS

WANG Caixia; LI Taijiang; CHEN Jigang; LIU Yumin; DANG XiaoliangXi'an Thermal Power Research Institute Co Ltd

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CAUSE ANALYSIS OF RUPTURE FAILURE FOR HIGH STRENGTH BOLTS USED FOR JOINTING STEEL STRUCTURE OF BOILERS

更新时间：2025-09-28

- CAUSE ANALYSIS OF RUPTURE FAILURE FOR HIGH STRENGTH BOLTS USED FOR JOINTING STEEL STRUCTURE OF BOILERS
- Thermal Power Generation Vol. 39, Issue 12, Pages: 84-87(2010)
- 作者机构：
  
  西安热工研究院有限公司
- 作者简介：
- 基金信息：
- DOI：
  CLC： TK228
- Published：2010
- 稿件说明：
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WANG Caixia, LI Taijiang, CHEN Jigang, et al. CAUSE ANALYSIS OF RUPTURE FAILURE FOR HIGH STRENGTH BOLTS USED FOR JOINTING STEEL STRUCTURE OF BOILERS[J]. Thermal power generation, 2010, 39(12): 84-87.
DOI：

WANG Caixia, LI Taijiang, CHEN Jigang, et al. CAUSE ANALYSIS OF RUPTURE FAILURE FOR HIGH STRENGTH BOLTS USED FOR JOINTING STEEL STRUCTURE OF BOILERS[J]. Thermal power generation, 2010, 39(12): 84-87. DOI：

摘要

针对某电厂锅炉钢架连接高强度螺栓的失效断裂

对未安装螺栓和断裂螺栓进行了理化性能检验与分析。结果表明

个体螺栓材料的化学成分、力学性能存在较大差异

加之螺栓不规范安装引起附加弯曲应力

导致了性能较差的螺栓发生延迟断裂。由此

建议对已安装螺栓用小锤敲击法逐个检验

及时更换问题螺栓;对未安装螺栓不同批次不可混用;对整体钢构架进行安全性评定。

Abstract

Directing against the rupture failure of high strength bolts used for jointing steel structure of boilers in one power plant

inspection and analysis of physico-chemical performance for non-installed bolts and ruptured bolts have been carried out.The results shwo that a large difference exists in chemical components and mechanical property of single bolt materials

morevoer

abnormal installation of bolts leads to additional bendling stress

resulting in delayed rupture of bolts with worse properties.Thereby

it is recommented to inspect the installed bolts one by one by using the small hammer striking method

timely replacing the problematic bolts.For non-installed bolts in different batches

mixed utilization has to be avoided.For an entire steel structure

a safety evaluation has to be carried out.

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