High-temperature-resistant synchronous motor magnetic steel and preparation method thereof

A technology for synchronous motors and high temperature resistance, which is applied in the manufacture of inductors/transformers/magnets, circuits, magnetic objects, etc., and can solve problems such as poor high temperature resistance, large temperature coefficient, and low Curie temperature of sintered NdFeB magnets , to achieve the effect of improving magnetic properties, high mechanical strength, improving grain size and grain morphology

Pending Publication Date: 2022-07-29
宁波中杭磁材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the Curie temperature of sintered NdFeB magnets is low, and the temperature coefficient is large, resulting in poor high temperature resistance

Method used

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  • High-temperature-resistant synchronous motor magnetic steel and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-4

[0031] A high temperature resistant synchronous motor magnetic steel is prepared according to the following method with reference to the ratio in Table 1:

[0032] S1. Put the raw materials of the alloy main body into a vacuum reactor, smelt at 1650 ° C, cast into 0.5mm thick slabs after smelting, and crush the slabs into coarse powder by hydrogen breaking reaction in a hydrogen breaking furnace, Then add gasoline accounting for 0.03% of the total mass of the coarse powder as a lubricant to carry out jet milling, and jet milling until the median particle size of the main alloy powder is 4 μm;

[0033] S2. Add silicon nitride powder accounting for 0.3% of the total mass of the alloy body powder to the alloy body powder, mix evenly, then add gasoline accounting for 0.02% of the total mass of the alloy body powder as a lubricant, and add 0.02% of the total weight of the alloy body powder. The phosphite is used as an antioxidant, and the mixture is uniformly mixed. Under the prote...

Embodiment 5

[0038] A high temperature resistant synchronous motor magnetic steel, the proportion of each component of the alloy body is prepared by the following method with reference to Example 3:

[0039] S1. Put the raw materials of the alloy main body into a vacuum reactor, smelt at 1800 ° C, cast into 0.75mm thick slabs after smelting, and crush the slabs into coarse powder by hydrogen breaking reaction in a hydrogen breaking furnace, Then add gasoline accounting for 0.05% of the total mass of the coarse powder as a lubricant to carry out jet milling, and jet milling until the median particle size of the main alloy powder is 5 μm;

[0040] S2. Add silicon nitride powder accounting for 0.3% of the total mass of the alloy body powder to the alloy body powder, mix evenly, then add gasoline accounting for 0.04% of the total mass of the alloy body powder as a lubricant, and add 0.05% of the total weight of the alloy body powder. Phosphite is used as antioxidant, mixed evenly, under the pr...

Embodiment 6

[0043] A high temperature resistant synchronous motor magnetic steel, the proportion of each component of the alloy body is prepared by the following method with reference to Example 3:

[0044] S1. Put the raw materials of the alloy main body into a vacuum reactor, smelt at 1700 ° C, cast into a 0.75mm thick slab after smelting, and crush the slab into coarse powder by hydrogen breaking reaction in a hydrogen breaking furnace, Then add gasoline accounting for 0.03% of the total mass of the coarse powder as a lubricant to carry out jet milling, and jet milling until the median particle size of the main alloy powder is 5 μm;

[0045] S2. Add silicon nitride powder accounting for 0.3% of the total mass of the main alloy powder to the main alloy powder, mix evenly, then add gasoline accounting for 0.03% of the total mass of the main alloy powder as a lubricant, and add 0.04% of the total mass of the main alloy powder. The phosphite is used as an antioxidant, and the mixture is un...

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Abstract

The invention relates to high-temperature-resistant synchronous motor magnetic steel and a preparation method thereof, the high-temperature-resistant synchronous motor magnetic steel comprises an alloy main body and an additive, the alloy main body comprises the following components: 28.5 to 35 wt% of PrNd, 0.17 to 0.23 wt% of Nb, 0.15 to 0.22 wt% of Ga, 0.12 to 0.24 wt% of Cu, 0.88 to 0.96 wt% of Co, 0.13 to 0.18 wt% of Zr, 0.75 to 1.22 wt% of Al, 0.91 to 0.97 t% of B and the balance of Fe, and the sum of the components is 100%; the additive is at least one of silicon nitride, aluminum nitride, aluminum oxide, aluminum dihydrogen phosphate and zirconium nitride; and the additive accounts for 0.3-0.65% of the total mass of the alloy main body. According to the technical scheme, the manufactured secondary steel has good magnetic performance and high temperature resistance.

Description

technical field [0001] The present application relates to the field of magnetic alloy technology, in particular to a high temperature resistant synchronous motor magnetic steel and a preparation method thereof. Background technique [0002] Synchronous motor is a commonly used AC motor. It is a component that integrates rotation and static, electromagnetic change and mechanical movement, and realizes the transformation of electrical energy and mechanical energy. Synchronous motors are generally composed of stators, rotors and end covers. When the synchronous motor is working, a rotating magnetic field is formed in the stator winding by passing three-phase current into the stator winding of the motor. Since the permanent magnet is installed on the rotor, the magnetic pole of the permanent magnet is fixed, and the magnetic poles attract each other according to the same sex. As opposites repel away from each other, the rotating magnetic field generated in the stator will drive...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/057H01F41/02B22F1/10B22F3/02B22F3/10B22F3/24B22F9/02B22F9/04C21D6/00C22C33/02C22C38/06C22C38/10C22C38/12C22C38/14C22C38/16
CPCH01F1/0577H01F1/0573H01F41/0253H01F41/0266C22C38/005C22C38/12C22C38/002C22C38/16C22C38/10C22C38/14C22C38/06B22F9/023B22F9/04C22C33/0228C22C33/0214C22C33/0278B22F1/10B22F3/02B22F3/101B22F3/24C21D6/00B22F2009/044B22F2003/248
Inventor 李爱明楼永华
Owner 宁波中杭磁材有限公司
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