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NdFeb Magnets According To The Proportion Of Ingredients
Aug 18, 2017

NdFeb Magnets According to the proportion of ingredients

1, raw material preparation and pretreatment:

   Process Description: the raw materials for weighing, broken, broken material and rust and other pretreatment.

   Process equipment: steel cutting machine, roller polishing machine

2, smelting:

   Process Description: After the pretreatment of raw materials praseodymium neodymium, pure iron, boron iron and other ingredients in accordance with the proportion, adding vacuum melting furnace, under the protection of argon in the high temperature smelting after the rejection. Making the product composition uniform, high degree of crystal orientation, good organization consistency, and to avoid the generation of ɑ-Fe.

   Process equipment: vacuum melting furnace

3, hydrogen explosion:

   Introduction: Hydrogen explosion (HD) process, is the use of rare earth intermetallic compounds hydrogen absorption characteristics, the NdFeB alloy placed in hydrogen environment, the hydrogen layer along the neodymium-rich phase into the alloy, so that burst burst and broken, along Rich neodymium layer at the crack, to ensure that the main grain and rich neodymium grain boundary phase integrity. HD process makes NdFeB's throwing film becomes very loose, greatly improving the efficiency of air milling mill, reducing production costs.

4, milling:

   Process Description: Air grinding powder is the use of high-speed collision of the material itself to crush the grinding chamber wall without wear, no pollution, you can efficiently prepare the powder.

   Process equipment: air mill

5, forming orientation:

   Process Description: The role of orientation is to make the chaotic orientation of the powder particles easy to magnetize the direction of c axis to the same direction up to get the maximum remanence. The main purpose of the press is to press the powder into a certain shape and size of the crush, while maintaining as much as possible in the magnetic field orientation obtained in the grain orientation. We designed the use of forming magnetic press and isostatic press for secondary molding, for the special-shaped magnets, the use of special mold tooling, direct molding, sintered magnets only need a little surface treatment can be put into use, significant savings in materials And subsequent processing costs.


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