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Judging quality of sintered ndfeb magnet

by:Maghard      2020-09-29
1, magnetic field orientation, our country is the only country adopts two-step forming technology in the world, to judge the quality of sintered ndfeb magnet orientation with a small pressure vertical moulding, finally USES the isostatic pressing molding, this is one of the most important characteristics of sintered ndfeb industry in our country. 2, and the quality of the production process monitoring is very important, can by SC chip thickness measurement and detection way JM powder particle size distribution of controls. Powerful magnet quality products are depends on the production process control, but the customer will be confused, how to determine the performance of the product I bought? The China institute of metrology has developed a variety of models of the permanent magnet magnetic materials technology parameter measuring instrument. Magnetometer (pulse magnetic field PFM) Is a kind of test instruments, high coercive force of permanent magnet is mainly in order to adapt to electric cars and large demand high coercive force of permanent magnet by permanent magnet motor. 3, according to the enterprise manufacturing high-grade or middle-grade or low-grade sintered ndfeb requirements, according to the regulations of the national standard of raw material composition to the choose and buy raw materials. 4, production technology is advanced or not directly determine the performance of the magnet quality. Is currently the most advanced technology scales ingot ( SC) Technology, hydrogen broken ( HD) Technology and jet mill ( JM) Technology. Small capacity of vacuum induction furnaces ( 10公斤,25公斤、50公斤) Has been the large capacity ( 100公斤、200公斤、600公斤、800公斤) Vacuum induction furnace. SC( StripCasting) Speed NingZhu chip technology has gradually replace large ingot ( More than 20 - cooling in the direction of thickness 40 mm ingot casting) Hydrogen, broken, HD) Technology and jet mill ( JM) Replaced the jaw crusher, plate mill, ball mill, Wet powder legal system) And ensure the uniformity of the powder, and is advantageous to the liquid phase sintering and grain refinement. / dongguan magnet products co. , LTD. , magnets, powerful magnets, magnet manufacturers, special-shaped magnet
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