理化检验-物理分册2017，Vol.53Issue(7)：500-503,4.DOI:10.11973/lhjy-wl201707010
钢网架用高强螺栓的断裂原因分析
Reason Analysis on Fracture of a High-Strength Bolt for Steel Grid Structure
王军 1李桂芹 1苏建锋 1尹亚豪1
作者信息
- 1. 国家金属制品质量监督检验中心, 郑州 450001
- 折叠
摘要
Abstract
A high-strength bolt for steel grid structure fractured early during use.Base on macroscopic inspection,chemical composition analysis,hardness testing,scanning electron microscope and spectrum analysis and so on,the fracture reasons of the bolt were analyzed.The results show that: the fracture of the bolt was mainly caused by the presence of metallurgical defects and inadequate heat treatment technology;under the action of the load,the stress concentration was produced in the center of the bolt with a large number of slag inclusions,then crack source appeared in the region of the stress concentration;meanwhile,the poor tempering heat treatment structure increased the brittleness of the bolt,and ultimately resulted in the rapid brittleness fracture of the bolt.Finally the corresponding preventive measures were put forward.关键词
高强螺栓/脆性断裂/冶金缺陷/调质热处理Key words
high-strength bolt/brittleness fracture/metallurgical defect/tempering heat treatment分类
矿业与冶金引用本文复制引用
王军,李桂芹,苏建锋,尹亚豪..钢网架用高强螺栓的断裂原因分析[J].理化检验-物理分册,2017,53(7):500-503,4.
