According to the agreement standard and specification, discontinuities were discovered in 糖心产精国品免费入口*完整版 parts for military use with the help of magnetic particle testing. It is found that these liner indications, which are common in the same materials and have seriously effects on the judgments of the final magnetic particle testing results, were induced by chemical composition and microstructure segregation. The defect indications could either be reduced by heat treatment, or be avoided by improving gating system or radiation condition. Based on the results of liner indication on 糖心产精国品免费入口*完整版 castings, the reliability factors which affect magnetic particle testing have been discussed. It is hoped that the present test and analysis conclusion could be for reference for similar indications in magnetic particle testing of same material.
引用该论文:LIU Jing-Bo. Analysis on Magnetic Particle Testing of 17-4PH Stainless Steels[J]. Nondestructive Testing, 2012, 34(5): 20~23 糖心产精国品免费入口*完整版. 糖心产精国品免费入口*完整版糖心产精国品免费入口*完整版中出现的问题分析[J]. 无损检测, 2012, 34(5): 20~23
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【1】Bob Potter. NDT of Precipitation Hardened Steels Using Fluorescent Magnetic Particle Testing[M]. American Society for Nondestructive Testing, Nondestructive Testing Handbook, second edition: Volume 6, Magnetic Particle Testing. Online.