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A computer-aided design method for nd-fe-b permanent magnet alloy synthesis process

A computer-aided, permanent magnet alloy technology, applied in the direction of computer-aided design, calculation, design optimization/simulation, etc., can solve the problems of optimization and the difficulty of optimal cooling rate of B alloy, so as to improve work efficiency and reduce research and development cycle and cost. , The effect of meeting the requirements of alloy properties and structure

Active Publication Date: 2022-07-26
GUILIN UNIV OF ELECTRONIC TECH
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Problems solved by technology

Therefore, in order to obtain high-purity Nd 2 Fe 14 Phase B requires a higher cooling rate to suppress the formation of the Fcc-Fe phase (conversion to the Bcc-Fe phase at around 911 ° C), but Nd 2 Fe 14 Optimal cooling rate for Alloy B is difficult to optimize with a single experiment

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  • A computer-aided design method for nd-fe-b permanent magnet alloy synthesis process
  • A computer-aided design method for nd-fe-b permanent magnet alloy synthesis process
  • A computer-aided design method for nd-fe-b permanent magnet alloy synthesis process

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Embodiment

[0023] A method for computer-aided design of Nd-Fe-B permanent magnet alloy synthesis process, comprising the following steps:

[0024] 1) Establish the phase diagram thermodynamics / diffusion kinetics database of Nd-Fe-B alloys: Based on the collection of the Gibbs free energies of each phase of the Nd-Fe-B ternary alloy system and its marginal binary system reported in the literature, the Nd-Fe-B ternary alloy system and its marginal binary system were collected. -The phase diagram thermodynamic database of Fe-B alloy system; by collecting the diffusion coefficient information of liquid phase and Fcc phase of Nd-Fe-B alloy system in literature, combined with Sutherland formula, the self-diffusion and impurity diffusion of Nd-Fe-B alloy system are obtained And the tracer diffusion coefficient, using DICTRA software, establishes the Nd-Fe-B alloy system liquid phase and Fcc phase atomic mobility parameter database, forming the alloy system diffusion kinetic database; 2 shown. ...

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Abstract

The invention discloses a computer-aided design method for a synthesis process of Nd-Fe-B permanent magnet alloy. The method includes establishing a phase diagram thermodynamics / diffusion kinetics database of Nd-Fe-B alloy; simulating the solidification path of permanent magnet alloy and Interdependence of cooling rates; calculation of Nd formation during alloy solidification 2 Fe 14 B-phase, Fcc-Fe-phase and liquid-phase content values; and predicted Nd 2 Fe 14 The best cooling rate of B permanent magnet alloy; finally, the predicted Nd is verified by experiments 2 Fe 14 B permanent magnet alloy cooling rate is the best cooling rate; and this is the process condition to guide Nd 2 Fe 14 B alloys are produced. The method can improve the efficiency of alloy design, meet the requirements of alloy performance and structure, greatly reduce the research and development cycle and cost of new alloy design, and has important guiding value for the design and production of new high-performance permanent magnet materials.

Description

technical field [0001] The invention relates to the technical field of computer-aided design, in particular to a computer-aided design method for a synthesis process of Nd-Fe-B permanent magnet alloy. Background technique [0002] Since the discovery of Nd-Fe-B permanent magnets in the 1980s, they have been widely used in electric motors, hybrid vehicles, and wind turbines due to their excellent comprehensive magnetic properties. There are two main preparation methods for Nd-Fe-B permanent magnets: rapid quenching and sintering. Both are used to obtain grain-refined Nd 2 Fe 14 Phase B. It can be seen from the equilibrium phase diagram of the Nd-Fe-B ternary system that Nd 2 Fe 14 Phase B is formed by peritectic reaction at 1155°C. Therefore, in order to obtain high-purity Nd 2 Fe 14 Phase B, requires a higher cooling rate to suppress the formation of Fcc-Fe phase (converted to Bcc-Fe phase at around 911°C), but Nd 2 Fe 14 The optimum cooling rate for Alloy B is dif...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20G06F119/08G06F119/14
CPCG06F30/20G06F2119/14G06F2119/08
Inventor 卢照李晓明姚青荣王江
Owner GUILIN UNIV OF ELECTRONIC TECH