中國有色金屬學(xué)報(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 12 No. 6 December 2002 |
electromagnetic nondestructive testing instrument forquality of metal material
FAN Jing-yun(樊景云)2, WAN Guo-qing(萬國慶)2
（1. Institute of Computer and Control,
Harbin University of Science and Technology,Harbin 150080, China;
2. Institute of Materials Science and Engineering, Harbin University of Science and Technology,Harbin 150080, China）
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.
Key words: hardness; electromagnetic nondestructive testing; magnetic conductivity; electrical conductivity
