Process control method for secondary processing of sintered NdFeB in quick-setting furnace

A technology of process control and control method, applied in the field of information, can solve the problems of no research on magnetic materials and cannot be directly applied, and achieve the effects of reducing energy waste, improving remanence, and reducing oxidation

Active Publication Date: 2014-01-22
NORTHEASTERN UNIV LIAONING
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Problems solved by technology

Peng Pin et al. assumed that the weight of the slabs was smaller than the furnace capacity, which was inconsistent with the fact that the NdFeB production enterprises required ingredients to be larger than the furnace capacity. Therefore, the method adopted did not study the products of different grades of magnetic materials. The quality of the heat combination problem cannot be directly applied

Method used

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  • Process control method for secondary processing of sintered NdFeB in quick-setting furnace
  • Process control method for secondary processing of sintered NdFeB in quick-setting furnace
  • Process control method for secondary processing of sintered NdFeB in quick-setting furnace

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Embodiment Construction

[0024] Embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings.

[0025] Take the belt throwing furnace of a certain NdFeB magnetic material enterprise as an example (the project won the National Natural Science Foundation of China (No. 61174187); the Ministry of Education's basic scientific research business fund (No. N110208001); the Northeastern University Startup Fund (No. 29321006) Support), explain the process control method of sintered NdFeB strip furnace processing, the overall process is as follows figure 1 shown. details as follows:

[0026]In this control method, the basic information is set first, involving: the maximum furnace weight of the belt-swing furnace, the minimum furnace weight of the belt-swing furnace, the upper limit of the use times of the crucible in the belt-swing furnace, the upper limit of the use times of the tundish in the belt-swing furnace, and the marking of commonly used ...

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Abstract

A process control method for secondary processing of sintered NdFeB in a quick-setting furnace belongs to the field of information technology. On the basis of product grades, grades of products processed in the quick-setting furnace are recorded and monitored. When the product grades change from non-common grades into common grades or are not the common grades any more, weight of casting strip heat is re-set according to the number of usage of an inner crucible and a tundish of the quick-setting furnace. Products in the corresponding grades are charged according to the set weight, and the NdFeB casting strips are sintered continuously according to the number of charges. Residual magnetism (Br) and magnetic polarization intensity coercive force (intrinsic coercive force) (Hcj) of the casting strips are increased effectively, oxidation and damp of the casting strips due to long-term placement are reduced, energy waste in quick-setting process is reduced, and results satisfying field staff are achieved.

Description

technical field [0001] The invention belongs to the field of information technology, and relates to modern integrated manufacturing technology, management and control integration technology, software technology and automation technology, and in particular to a process control method for sintered NdFeB strip furnace processing. Background technique [0002] The stripping process of sintered NdFeB has a crucial impact on the subsequent powder making process, magnetic field orientation process and sintering process. Improper handling of such links will have an important impact on the performance of sintered NdFeB magnetic materials. [0003] Sintered NdFeB is a permanent magnet material. From the point of view of manufacturing permanent magnet materials, it is hoped that there will be no coarse α-Fe dendrites in the strip structure. This is due to the good plasticity of α-Fe dendrites, which makes it difficult to break the flakes and causes difficulties in the powder making pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C33/04C22C38/00B22D11/06B22F9/04H01F1/057H01F1/08H01F41/02
Inventor 刘业峰潘全科柴天佑郑秉霖
Owner NORTHEASTERN UNIV LIAONING
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