Production method for N35 lanthanum-cerium-neodymium-iron-boron magnet material

A production method and NdFeB technology, applied in magnetic materials, magnetic objects, electrical components, etc., can solve the problems of high cost and high energy consumption, and achieve the effect of reducing raw material cost, saving sintering time, and enhancing toughness

Inactive Publication Date: 2012-02-22
孙允成
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to market research, the N35 NdFeB magnet material is currently the most demanded magnet material in the market. It needs a variety of metals and rare earth elements during production, which is costly and consumes a lot of energy in the production process.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1, produce N35 lanthanum cerium neodymium iron boron magnet material according to the following steps:

[0017] (1) Take the following raw materials by weight percentage: Praseodymium Neodymium (Pr-Hd) 15.0, Lanthanum Ceria (La-Ce) 20.0, Niobium (Nd) 0.75, Aluminum (AI) 0.9, Copper (Cu) 0.25, Boron (B) 1.15, Iron (Fe) 61.95;

[0018] (2) Put the above raw materials into the smelting furnace to preheat for 10 minutes, the melting temperature is 1350°C, and the melting time is 20 minutes. After the raw materials are fully fused, stand still and cast into ingots. The cooling water temperature is kept below 30°C and cooled for 40 minutes;

[0019] (3) Use a jet mill to grind the ingot into 4.5-4.8um powder, stir in the mixer for 2.5 hours, put it into a protective bag and fill it with nitrogen for standby;

[0020] (4) The powder is molded in the molding machine, the pressure is 8Mpa, and the time is 30S;

[0021] (5) The molded blocks are sintered in a sinteri...

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PUM

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Abstract

The invention discloses a production method for an N35 lanthanum-cerium-neodymium-iron-boron magnet material. The production method comprises the following steps of: weighing the following raw materials in percentage by weight: 15.0 percent of praseodymium-neodymium (Pr-Hd), 20.0 percent of lanthanum-cerium (La-Ce), 0.75 percent of niobium (Nb), 0.9 percent of aluminum (Al), 0.25 percent of copper (Cu), 1.15 percent of boron (B) and 61.95 percent of iron (Fe); filling the raw materials into a smelting furnace for smelting; fully fusing, standing and casting into an ingot; cooling with cooling water at the temperature of 30 DEG C for 40 minutes; sintering a formed block, namely sintering at the temperature of 1,120 DEG C for 3.5 hours, then sintering at the temperature of 920 DEG C for 2 hours and then sintering at the temperature of 565 DEG C for 3.5 hours; finally cooling to 60 DEG C to discharge; and detecting and warehousing qualified products. The lanthanum-cerium-neodymium-iron-boron magnet material reaches N35 level; the production cost is reduced; and the resource consumption is reduced.

Description

technical field [0001] The invention relates to a production method of an iron-boron magnet material, in particular to a production method of an N35 lanthanum cerium neodymium-iron-boron magnet material. Background technique [0002] Neodymium iron boron (NdFeB) is currently the most magnetic rare earth permanent magnet material, it has a high magnetic energy product (8MGOe-64MGOe), good coercive force (Hcj) and high temperature resistance. Products are widely used in electric vehicles, wind power generation, inverter air conditioners, nuclear magnetic resonance, CD drives, instruments, mineral processing, toys and other fields. At present, there are many domestic manufacturers of NdFeB magnet materials, and the production process of different grades of NdFeB magnet materials is basically the same. According to market research, the N35 NdFeB magnet material is currently the most demanded magnet material in the market. It needs a variety of metals and rare earth elem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/057B22F3/16
Inventor 孙允成
Owner 孙允成
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