法兰盘黑纹缺陷分析

Analysis on Defect of Dark Lines on Flange

针对法兰盘加工面上出现的黑纹缺陷 ,采用光学显微镜、扫描电镜和电子探针等测试方法对其进行了分析。结果表明 ,黑纹缺陷是由聚集分布的硫化锰夹杂物及富磷的铁素体组成的偏析带。

Analysis is made on the dark lines defects occurring over the working surface of flange by measurement with the optical microscope,Scanning Electro Microscope (SEM) and electronic probe. Results show that the dark lines are segregation bands composed mainly of the build-up of manganese sulphide inclusions and rich phosphorous ferrite.