1018钢螺钉断裂失效分析OA
Failure Analysis on Fracture of 1018 Steel Screws
采用直读光谱仪、显微维氏硬度计、光学显微镜和扫描电镜等仪器设备分别对1018钢渗碳处理的M3×6十字头自攻螺钉的化学成分、硬度、显微组织和断口形貌进行了分析，查明了螺钉断裂原因。结果表明：螺钉断裂属典型的脆性断裂，与其渗碳层深度超标，心部硬度又接近标准范围上限有关；螺钉断口还具有一定的氢脆断裂特征，是由于高的硬度和超标的渗碳层深度增加了螺钉的氢脆敏感性。最后根据螺钉断裂原因提出了改进措施。
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 hardn…查看全部>>
骆亍;宾远红;李培芬
广东省珠海市质量计量监督检测所，珠海 519060 广东省质量监督游艇材料检验站，珠海 519060广东省珠海市质量计量监督检测所，珠海 519060
矿业与冶金
自攻螺钉脆性断裂氢脆硬度渗碳层深度
self-tapping screwbrittle fracturehydrogen embrittlementhardnesscarburized layer depth
《理化检验-物理分册》 2016 (4)
281-283,3
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