CAJ | 학술논문

通过磁粉检测、化学成分分析、硬度测试、金相分析和扫描电镜分析等方法对法兰泄漏原因进行了分析。结果表明：法兰上存在原始裂纹是法兰泄漏的主要原因。原始裂纹在组织脱碳之前已经形成，建议用磁粉法检测此类原始缺陷。
통과자분검측、화학성분분석、경도측시、금상분석화소묘전경분석등방법대법란설루원인진행료분석。결과표명：법란상존재원시렬문시법란설루적주요원인。원시렬문재조직탈탄지전이경형성，건의용자분법검측차류원시결함。
The reasons of a leak flange were analysed by magnetic particle inspection, chemical composition analysis, hardness test, metallographic examination and scanning electron microscopy. The results show that the original crack is main reason resulted in flange leakage. The original crack is formed before the mcirostructure decarburization. It is suggested that detecting this original crack by magnetic particle inspection.