Novel permanent magnet alloy with composite low-price rare earth added and preparation method thereof

A permanent magnet alloy and rare earth permanent magnet technology, which is applied in the direction of magnetic materials, magnetic objects, and inorganic materials, can solve problems such as complex processes, and achieve simple preparation processes, easy implementation, and improved coercive force and temperature stability. Effect

Active Publication Date: 2015-09-09
CENT IRON & STEEL RES INST
View PDF7 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent CN102800454A discloses a kind of 'low-cost double main phase Ce permanent magnet alloy and its preparation method', wherein (Ce x , Re 1-x )Fe 100-a-b-c B b tm c The content of Ce in the alloy is between 40% and 80%, but its Re is one or more of the rare earth elements Nd, Pr, Dy, Tb, Ho, and it adopts the dual main phase process to prepare the Ce permanent magnet alloy by low H A (Ce,Re)-Fe-B phase and high H A The Nd-Fe-B phase composition is used to improve the performance of the magnet, and the process is relatively complicated

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Novel permanent magnet alloy with composite low-price rare earth added and preparation method thereof
  • Novel permanent magnet alloy with composite low-price rare earth added and preparation method thereof
  • Novel permanent magnet alloy with composite low-price rare earth added and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Step 1: By design composition (Gd 0.01 Ce 0.14 Nd 0.85 ) 30 Fe bal B 1.0 tm 1.1 (TM=Al, Co, Cu, Nb) (wt.%) Prepare raw materials, wherein the content of Gd accounts for 1% of the total amount of rare earths, and the content of Ce accounts for 14% of the total amount of rare earths.

[0028] Step 2: Melt the prepared raw materials to prepare quick-setting tape. First put the raw materials into the crucible of the quick-setting furnace, and conduct vacuum induction melting under the protection of argon. After the raw materials are fully melted to form an alloy, keep the temperature at 1300-1500 ° C, and pour the alloy liquid to a line speed of 1.0-2.0 m / s Prepare quick-setting sheets with an average thickness of 0.2-0.45mm on a water-cooled copper roller. The quick-setting tablet is made by Re 2 Fe 14 B columnar crystal main phase and flaky Nd-rich phase, the main phase columnar crystal is centered along the nucleation point of the roller surface, grows in a cone...

Embodiment 2

[0037] Step 1: By design composition (Gd 0.1 Ce 0.2 Nd 0.7 ) 31 Fe bal B 1.0 tm 1.1 (TM=Al, Co, Cu, Nb) (wt.%) Prepare raw materials, wherein the content of Gd accounts for 10% of the total amount of rare earths, and the content of Ce accounts for 20% of the total amount of rare earths.

[0038] Step 2: Melt the prepared raw materials to prepare quick-setting tape. First put the raw materials into the crucible of the quick-setting furnace, and carry out vacuum induction melting under the protection of argon. After the raw materials are fully melted to form an alloy, keep the temperature at 1300-1500 ° C, and pour the alloy liquid to a line speed of 1.0-3.0 m / s Prepare quick-setting sheets with an average thickness of 0.20-0.45mm on a water-cooled copper roller.

[0039] Step 3: crushing powder: (Gd obtained in the step 2 0.1 Ce 0.2 Nd 0.7 ) 31 Fe bal B 1.0 tm 1.1 (TM=Al, Co, Cu, Nb) (wt.%) The quick-setting sheet is put into the hydrogen breaking furnace, hydroge...

Embodiment 3

[0047] Step 1: By design composition (Gd 0.15 Ce 0.35 RE 0.5 ) 32 Fe bal B 1.01 tm 1.1 (RE=Pr, Nd; TM=Al, Cu, Zr) (wt.%) Prepare raw materials, wherein the content of Gd accounts for 15% of the total amount of rare earths, and the content of Ce accounts for 35% of the total amount of rare earths.

[0048] Step 2: Melt the prepared raw materials to prepare quick-setting tape. First put the raw materials into the crucible of the quick-setting furnace, and carry out vacuum induction melting under the protection of argon. After the raw materials are fully melted to form an alloy, keep the temperature at 1300-1500 ° C, and pour the alloy liquid to a line speed of 1.0-3.0 m / s Prepare quick-setting sheets with an average thickness of 0.20-0.45mm on a water-cooled copper roller.

[0049] Step 3: crushing powder: (Gd obtained in the step 2 0.15 Ce 0.35 RE 0.5 ) 32 Fe bal B 1.01 tm 1.1 (RE=Pr, Nd; TM=Al, Cu, Zr) (wt.%) The quick-setting sheet is put into the hydrogen break...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention belongs to the technical field of rare earth permanent magnetic materials, and relates to novel permanent magnet alloy with composite low-price rare earth added and a preparation method thereof. The chemical formula of the alloy is as follows, by weight, (GdxCeyRE1-x-y) a (Fe and TM)100-a-bBb, wherein x is larger than or equal to 0.01 and is smaller than or equal to 0.4, y is larger than or equal to 0. 1 and is smaller than or equal to 0.9, a is larger than or equal to 28 and is smaller than or equal to 35, b is larger than or equal to 0.9 and is smaller than or equal to 1.2, Re is one or more rare earth elements besides Ce and Gd, and TM refers to one or more of Ga, Co, Al, Cu, Nb, Zr, Ti and V. The preparation method of the rare earth permanent magnet alloy includes the steps of raw material preparation, strip-casting flake preparation, hydrogen decrepitation, orientation forming and pressing, sintering and heat treatment. A novel low-cost rare earth permanent magnetic material is obtained, efficient utilization of low-price Ce rare earth elements can be achieved, in particular, when the content of Ce in total rare earth reaches 50%, good coercivity and comprehensive magnetic performance can still be achieved, good corrosion resistance and machinability are kept, and obvious cost and price advantages can be achieved.

Description

technical field [0001] The invention belongs to the technical field of rare earth permanent magnet materials, and relates to a novel low-cost rare earth permanent magnet alloy compounded with Gd and Ce and a preparation method thereof. Background technique [0002] Sintered NdFeB permanent magnet materials have the characteristics of high remanence and high magnetic energy product, and are widely used in the fields of electronics, information, energy, power, transportation and cutting-edge technology, and are one of the basic materials of modern industry. In recent years, with the rapid development of new energy vehicles, wind power generation and high-efficiency and energy-saving home appliances, the demand for rare earth permanent magnet materials is increasing day by day. [0003] Since sintered NdFeB permanent magnet materials mainly use Pr and Nd as raw materials, the coercive force and temperature stability are further improved by adding heavy rare earths Dy and Tb, wh...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H01F1/057H01F1/06C22C28/00
Inventor 冯海波李卫李安华朱明刚黄书林赵扬
Owner CENT IRON & STEEL RES INST
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap