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本文简述了用“GDC—Ⅲ”型和“GDC—Ⅳ”型电磁无损检测仪检测锉刀成品件硬度与毛坯退火硬度的原理及其试验方法。试验结果表明该两型仪器能胜任锉刀硬度逐件无损检测工作。
This paper briefly describes the principle and test method of testing the hardness of the finished file and the annealing hardness of the blank by “GDC-Ⅲ” type and “GDC-Ⅳ” type electromagnetic nondestructive testing instrument. The test results show that the two types of instruments capable of file hardness one by one non-destructive testing.