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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 10147528 B1

PDFFull Text
Date of Patent:
Dec. 04, 2018

Filed:

Mar. 27, 2012

Non-oriented electrical steel sheet with fine magnetic performance, and calcium treatment method therefor

Applicants:

Feng Zhang, Shanghai, CN;

Xiandong Liu, Shanghai, CN;

Shishu Xie, Shanghai, CN;

Xuejun LU, Shanghai, CN;

Xiao Chen, Shanghai, CN;

Aihua MA, Shanghai, CN;

Peili Zhang, Shanghai, CN;

Yanwei Wang, Shanghai, CN;

Lan Zhang, Shanghai, CN;

Hongxu Hei, Shanghai, CN;

Inventors:

Feng Zhang, Shanghai, CN;

Xiandong Liu, Shanghai, CN;

Shishu Xie, Shanghai, CN;

Xuejun Lu, Shanghai, CN;

Xiao Chen, Shanghai, CN;

Aihua Ma, Shanghai, CN;

Peili Zhang, Shanghai, CN;

Yanwei Wang, Shanghai, CN;

Lan Zhang, Shanghai, CN;

Hongxu Hei, Shanghai, CN;

Assignee:

Boashan Iron & Steel Co., LTD, Shanghai, CN;

Attorney:

Eversheds Sutherland (US) LLP

Primary Examiner:

Kaj K Olsen

Assistant Examiner:

Alexandra M Moore

Int. Cl.
CPC ...
H01F 1/147 (2006.01); C21C 7/10 (2006.01); C22C 38/06 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C21D 8/12 (2006.01); C21D 9/46 (2006.01); C21C 7/06 (2006.01); H01F 1/16 (2006.01); C21C 7/00 (2006.01); C21C 7/068 (2006.01);
U.S. Cl.
CPC ...
H01F 1/14775 (2013.01); C21C 7/0006 (2013.01); C21C 7/06 (2013.01); C21C 7/068 (2013.01); C21C 7/10 (2013.01); C21D 8/12 (2013.01); C21D 9/46 (2013.01); C22C 38/001 (2013.01); C22C 38/002 (2013.01); C22C 38/004 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); H01F 1/14766 (2013.01); H01F 1/16 (2013.01); H01F 1/14791 (2013.01);
Abstract

A non-oriented electrical steel sheet with fine magnetic performance, and a calcium treatment method therefor, including an RH (Ruhrstahl-Heraeus) refinement step. The RH refinement step sequentially comprises a decarbonization step, an aluminum deoxidation step, and a step of adding calcium alloy. In the step of adding calcium alloy, time when the calcium alloy is added satisfies the following condition: time interval between Al and Ca/total time after ΣAl=0.2-0.8. In this method, production cost is reduced, the production process is simple, a normal processing cycle of RH refinement is not affected, the device is convenient in operation and is controllable, and foreign substances are controllable in both shape and quantities. The non-oriented electrical steel sheet prepared according to the present invention has fine magnetic performance, and the method can be used for mass production of the non-oriented electrical steel sheet with fine magnetic performance.

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