理化检验-物理分册2016，Vol.52Issue(12)：903-905,3.DOI:10.11973/lhjy-wl201612016
40Cr钢紧固螺栓断裂原因分析
Reasons Analysis on Fracture of 40Cr Steel Fastening Bolts
杨晓 1陈政龙 1潘恒沛 1夏申琳1
作者信息
- 1. 中国船舶重工集团第七二五研究所,洛阳471023
- 折叠
摘要
Abstract
The 40Cr steel fastening bolts used for connecting pipe flanges of a petrochemical plant,fractured transversally after less than a year of use.And the fracture reasons were analyzed by means of macroscopic analysis,chemical composition analysis,optical microscopy and scanning electron microscopy observation,and hardness test.The results show that the bolts serviced under high stress level,so hydrogen embrittlement fracture occurred under the combined action of stress and hydrogen.More hydrogen introduced during acid pickling phosphorus and phosphating process were main cause for the hydrogen embrittlement fracture of the fastening bolts.关键词
40Cr钢/螺栓/断裂/氢脆Key words
40Cr steel/bolt/fracture/hydrogen embrittlement分类
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杨晓,陈政龙,潘恒沛,夏申琳..40Cr钢紧固螺栓断裂原因分析[J].理化检验-物理分册,2016,52(12):903-905,3.
