Development and application of WGQ type micro-computer-basedelectromagnetic nondestructive testing instrument forquality of metal material

来源期刊：中国有色金属学报(英文版)2002年第6期

论文作者：万静 何云斌 樊景云 万国庆

文章页码：1058 - 1062

Key words：hardness; electromagnetic nondestructive testing; magnetic conductivity; electrical conductivity

Abstract: The WGQ type micro-computer-based electromagnetic nondestructive testing instrument for quality of metal material was developed on the principle of electromagnetic induction. The invention and marketing of the WGQ instrument has solved the world-wide tough problem of the “N” shape relation between the indicated values of testing instruments and the hardness of most metal parts, particularly steel and iron parts. It has also greatly improved the hardness testing precision of aluminium alloy. Consequently the instrument can accurately perform either the quantitative testing of aluminium alloy, steel and iron parts hardness or the qualitative testing of their internal and external defects such as cracks, over-burnt and so on. Its hardness testing precision is HRB±0.7, HRC±1 and HB±10. The testing speed can reach 1500 parts per hour. The instrument has already been successfully applied to the spot of lots of factories.