理化检验-物理分册2016，Vol.52Issue(4)：281-283,3.DOI:10.11973/lhjy-wl201604017
1018钢螺钉断裂失效分析
Failure Analysis on Fracture of 1018 Steel Screws
骆亍 1宾远红 2李培芬1
作者信息
- 1. 广东省珠海市质量计量监督检测所，珠海 519060
- 2. 广东省质量监督游艇材料检验站，珠海 519060
- 折叠
摘要
Abstract
The fracture reasons of the carburized 1018 steel M3×6 crosshead self-tapping screws were found out by analyzing their chemical compositions,hardness,microstructure and fracture morphology by direct reading spectrometry,Vickers hardness tester,optical microscope and scanning electron microscope (SEM).The results show that the fracture mode of the screws was typical brittle fracture,which should be due to the exceeded carburized layer depth and the core hardness being close to the upper limit of the standard range.At the same time, the fracture of the screws also showed some characteristics of hydrogen embrittlement fracture because the higher hardness and the exceeded carburized layer depth increased the susceptibility of the screws to hydrogen embrittlement.Finally,improvement measures were put forward according to the fracture reasons.关键词
自攻螺钉/脆性断裂/氢脆/硬度/渗碳层深度Key words
self-tapping screw/brittle fracture/hydrogen embrittlement/hardness/carburized layer depth分类
矿业与冶金引用本文复制引用
骆亍,宾远红,李培芬..1018钢螺钉断裂失效分析[J].理化检验-物理分册,2016,52(4):281-283,3.
