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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 11508519 B1

PDFFull Text
Date of Patent:
Nov. 22, 2022

Filed:

Oct. 09, 2018

Continous heat treatment device and method for alloy workpiece or metal workpiece

Applicant:

Fujian Changting Golden Dragon Rare-earth Co., Ltd., Fujian Province, CN;

Inventors:

Qingjiang Wang, Fujian Province, CN;

Ying Luo, Fujian Province, CN;

Jianpeng Wu, Fujian Province, CN;

Assignee:

Fujian Changting Golden Dragon Rare-Earth Co., Ltd, Fujian Province, CN;

Attorney:

Cooper Legal Group, LLC

Primary Examiner:

Jessee R Roe

Assistant Examiner:

Michael Aboagye

Int. Cl.
CPC ...
H01F 41/02 (2006.01); C21D 9/00 (2006.01); C21D 1/773 (2006.01); C21D 1/613 (2006.01); B22F 3/24 (2006.01); F27B 9/02 (2006.01); F27D 9/00 (2006.01); H01F 1/057 (2006.01); F27B 5/02 (2006.01); F27B 5/04 (2006.01); F27B 5/18 (2006.01); H01L 21/67 (2006.01); F27B 5/06 (2006.01);
U.S. Cl.
CPC ...
H01F 41/0253 (2013.01); B22F 3/24 (2013.01); C21D 1/613 (2013.01); C21D 1/773 (2013.01); C21D 9/0056 (2013.01); C21D 9/0062 (2013.01); C21D 9/0068 (2013.01); F27B 5/02 (2013.01); F27B 5/04 (2013.01); F27B 5/18 (2013.01); F27B 9/028 (2013.01); F27D 9/00 (2013.01); H01F 1/0577 (2013.01); H01L 21/67098 (2013.01); H01L 21/67173 (2013.01); H01L 21/67184 (2013.01); B22F 2003/248 (2013.01); B22F 2201/10 (2013.01); C21D 2201/00 (2013.01); F27B 2005/062 (2013.01); F27D 2009/0072 (2013.01);
Abstract

Disclosed are a continuous heat treatment device and method for a sintered Nd—Fe—B magnet workpiece. The device comprises a first heat treatment chamber, a first cooling chamber, a second heat treatment chamber, and a second cooling chamber continuously disposed in sequence, as well as a transfer system disposed among the chambers to transfer the alloy workpiece or the metal workpiece; both the first cooling chamber and the second cooling chamber adopt a air cooling system, wherein a cooling air temperature of the first cooling chamber is 25° C. or above and differs from a heat treatment temperature of the first heat treatment chamber by at least 450° C.; a cooling air temperature of the second cooling chamber is 25° C. or above and differs from a heat treatment temperature of the second heat treatment chamber by at least 300° C. The continuous heat treatment device and method can improve the cooling rate and production efficiency and improve the properties and consistency of the products.

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