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A Rare Earth Soft Magnetic Alloy Directly Deposited by Laser and Its Magnetic Properties Regulation Method

A technology of laser direct deposition and soft magnetic alloy, applied in the fields of magnetic properties measurement, magnetic objects, magnetic materials, etc., can solve the problems of soft magnetic alloy controlled production line adjustment, magnetic reduction, limited processing space, etc., to improve the comprehensive application technology level , the effect of expanding the scope of application

Active Publication Date: 2020-08-28
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Compared with the advantages of laser direct deposition technology, soft magnetic alloys prepared by traditional methods such as metal casting, mechanical metallurgy, high-energy sintering, thermal spraying, etc., will lead to a decrease in magnetic properties due to excessive grain growth under large-area high-temperature conditions, and subject to limited processing space
Innovative development of new soft magnetic alloys is subject to expensive production line adjustments, which has a negative impact on the research and development of soft magnetic alloys

Method used

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  • A Rare Earth Soft Magnetic Alloy Directly Deposited by Laser and Its Magnetic Properties Regulation Method
  • A Rare Earth Soft Magnetic Alloy Directly Deposited by Laser and Its Magnetic Properties Regulation Method
  • A Rare Earth Soft Magnetic Alloy Directly Deposited by Laser and Its Magnetic Properties Regulation Method

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Embodiment 1

[0030] (1) Raw materials for preparing rare earth soft magnetic alloy powder according to the composition ratio, the composition is divided into by weight: Ni: 80.0 parts, Mo: 2.5 parts, Gd: 2.0 parts, Si: 1.0 parts, Fe balance;

[0031] (2) Use hot inert gas atomization method (or rotating electrode atomization method) to prepare powder, use magnesia crucible to melt to alloy solution, and then pour into tundish to start high temperature supersonic inert gas atomization. The atomization medium is pure Argon, followed by powder sieving to finally obtain rare earth soft magnetic alloy powder with good sphericity and average particle size of 200 mesh;

[0032] (3) Place the rare earth soft magnetic alloy powder in a vacuum drying oven for 2 hours to dry at a temperature of 80°C and keep the vacuum at -0.06MPa to remove the influence factor of water vapor on defects;

[0033] (4) Select a Fe80NiSi cylinder with an inner diameter of 32mm as the carrier substrate, and fix it on the...

Embodiment 2

[0039](1) Raw materials for preparing rare earth soft magnetic alloy powder according to the composition ratio, the composition is divided into by weight: Ni: 80.0 parts, Mo: 2.5 parts, Gd: 2.0 parts, Si: 1.0 parts, Fe balance;

[0040] (2) Use hot inert gas atomization method (or rotating electrode atomization method) to prepare powder, use magnesia crucible to melt to alloy solution, and then pour into tundish to start high temperature supersonic inert gas atomization. The atomization medium is pure Argon, followed by powder sieving to finally obtain rare earth soft magnetic alloy powder with good sphericity and average particle size of 200 mesh;

[0041] (3) Place the rare earth soft magnetic alloy powder in a vacuum drying oven for 2 hours to dry at a temperature of 80°C and keep the vacuum at -0.06MPa to remove the influence factor of water vapor on defects;

[0042] (4) Select a Fe80NiSi cylinder with an inner diameter of 32mm as the carrier substrate, and fix it on the ...

Embodiment 3

[0048] (1) Raw materials for preparing rare earth soft magnetic alloy powder according to the composition ratio, the composition is divided into by weight: Ni: 80.0 parts, Mo: 2.5 parts, Gd: 2.0 parts, Si: 1.0 parts, Fe balance;

[0049] (2) Use hot inert gas atomization method (or rotating electrode atomization method) to prepare powder, use magnesia crucible to melt to alloy solution, and then pour into tundish to start high temperature supersonic inert gas atomization. The atomization medium is pure Argon, followed by powder sieving to finally obtain rare earth soft magnetic alloy powder with good sphericity and average particle size of 200 mesh;

[0050] (3) Place the rare earth soft magnetic alloy powder in a vacuum drying oven for 2 hours to dry at a temperature of 80°C and keep the vacuum at -0.06MPa to remove the influence factor of water vapor on defects;

[0051] (4) Select a Fe80NiSi cylinder with an inner diameter of 32mm as the carrier substrate, and fix it on the...

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Abstract

The invention discloses a rare earth magnetically-soft alloy prepared through laser direct deposition and a magnetic performance regulation and control method thereof. The magnetic performance regulation and control method of the rare earth magnetically-soft alloy comprises the following step that the laser directly-deposited rare earth magnetically-soft alloy is prepared from, by weight, 79.0-80.0 parts of Ni, 1.5-2.5 parts of Mo, 1.0-2.0 parts of Gd, 0.5-1.0 part of Si, and the balance Fe. The rare earth magnetically-soft alloy is prepared through laser direct deposition, and then heat treatment is conducted on the formed magnetically-soft alloy. The magnetic performance of the novel rare earth magnetically-soft alloy is regulated and controlled through a defect quantification method, adigital relation is established between defects and the magnetic soft performance, and the high-performance high-compactness rare earth magnetically-soft alloy of a user-defined specification is finally obtained. According to the optimal process parameters, the laser power is 700-900 W, the spot size is 3-6 mm, the laser scanning speed is 4-15 mm / s, and the powder feeding rate is 25-30 g / min. Therare earth magnetically-soft alloy prepared through laser direct deposition meets the customization requirement of precision devices such as aerospace and chip navigation devices for high-performancemagnetically-soft alloys and has important application prospects in military and high-precision industries.

Description

technical field [0001] The invention relates to the field of metallurgical technology of soft magnetic alloy materials, in particular to a rare earth soft magnetic alloy directly deposited by laser and a method for regulating its magnetic properties. Background technique [0002] Iron-nickel soft magnetic alloy material is a kind of soft magnetic material with high magnetic permeability and low coercive force. Due to its special magnetic, mechanical and electrical characteristics, it is widely used in magnetic induction transformers, filter inductors and other electronic devices. It occupies an important position in today's magnetic material market. In order to adapt to applications in various fields, various soft magnetic alloys with different characteristics can be obtained by adjusting the composition content of soft magnetic alloys and adding one or several rare earth alloy elements such as Gd, Nd, La, etc. A control method to obtain a soft magnetic alloy with excellent...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C19/03C22C1/04C23C24/10C22F1/10H01F1/147H01F41/20G01N15/08G01N33/2045G01R33/14
CPCC22C1/0433C22C19/03C22F1/10C23C24/106G01N15/08G01N33/2045G01R33/14H01F1/14733H01F41/205
Inventor 杨胶溪成龙张文韬徐凯
Owner BEIJING UNIV OF TECH
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