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How To Judge The Quality Of Sintered NdFeB Magnet?

Today to say is not a wide range of magnetic materials, we gather a small point, do not think that small does not make sense, I believe we are very concerned about the content, how to judge the quality of sintered NdFeB magnet? Sintered NdFeB we are not familiar with it, its production process and other content we have already said, please poke:

Sintered NdFeB Magnet permanent magnet, as one of the important substances to promote contemporary technology and social progress, is widely used in the following areas:

Since 1985 in Japan, China and Europe and the United States at the same time began to industrialization, which nearly 30 years, the global permanent magnet material industry to flourish, magnetic properties continue to refresh the record, the variety of materials and grades continue to increase. With the expansion of the market, its manufacturers are also increasing, and many customers will inevitably fall into such a confused, how to judge the merits of the product?

The most comprehensive method of judgment

First, the magnet performance

Second, the size of the magnet

Third, the magnet coating

Production of raw materials

First of all, the protection of magnet performance from the raw material production process control.

1, according to the enterprise manufacturing high-grade or mid-range or low-grade sintered NdFeB Magnet requirements, in accordance with national standards of raw materials to buy raw materials.

2, the production process of advanced or not directly determine the performance of the magnet quality. At present, the most advanced technology is scale ingot (SC) technology, hydrogen crushing (HD) technology and airflow grinding (JM) technology.

Small capacity vacuum induction smelting furnace (10kg, 25kg, 50kg) was

Large capacity (100kg, 200kg, 600kg, 800kg) vacuum induction furnace replaced

SC (StripCasting) Quick Casting Chip Technology

Has gradually replaced large ingots

Hydrogen crushing (HD) technology and airflow grinding (JM)

Replace the jaw crusher, plate mill, ball mill (wet milling)

3, the magnetic field orientation, China is the world's only two-step compression molding of the country, the orientation with a small pressure vertical molding, and finally the use of quasi-isostatic pressing, which is China's sintered NdFeB Magnet industry, one of the most important features The

4, and the quality of the production process monitoring is very important, can be measured by SC film thickness and JM powder particle size distribution and other detection methods for control. China Institute of Metrology has developed a variety of models of permanent magnet materials technology magnetic parameters measuring instruments.

The third generation of rare earth permanent magnet NdFeB is the most powerful permanent magnet in contemporary magnets, its main raw material is rare earth metal neodymium 29% -32.5% metal element iron 63.95-68.65% non-metallic element boron 1.1-1.2% Dysprosium 0.6-1.2% niobium 0.3-0.5% aluminum 0.3-0.5% copper 0.05-0.15% and other elements

Process: Ingredients → Melting ingot / Scraping → Pulverizing → Pressing → Sintering Tempering → Magnetic detection → Grinding → Cutting processing → Electroplating → Finished product. Which ingredients are the foundation, sintering tempering is the key.

NdFeB magnet production tools and performance testing tools: a smelting furnace, scrapping furnace, E broken machine, air grinding, pressing machine, vacuum packaging machine, isostatic press, sintering furnace, heat treatment vacuum furnace, magnetic performance test Instrument, gauss meter.

NdFeB Magnet Machining Tools: unintentional grinding, spheronization machine, double-end grinding, flat grinding, slicing machine, double-sided grinding, wire cutting, Tianjin high-speed, West Lake bench drill, profiled grinding and so on.

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