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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 10851435 B1

PDFFull Text
Date of Patent:
Dec. 01, 2020

Filed:

Dec. 14, 2016

Dual-hardness clad steel plate and production method thereof

Applicant:

Baoshan Iron & Steel Co., Ltd., Shanghai, CN;

Inventors:

Xiaoting Zhao, Shanghai, CN;

Bao Yan, Shanghai, CN;

Liandeng Yao, Shanghai, CN;

Sihai Jiao, Shanghai, CN;

Hongbin Li, Shanghai, CN;

Assignee:

Baoshan Iron & Steel Co., Ltd., Beijing, CN;

Attorney:

Thomas Horstemeyer, LLP

Primary Examiner:

Anthony J Zimmer

Assistant Examiner:

Ricardo D Morales

Int. Cl.
CPC ...
C21D 9/50 (2006.01); B32B 15/00 (2006.01); C21D 9/48 (2006.01); C21D 9/46 (2006.01); C21D 8/04 (2006.01); C21D 8/02 (2006.01); C21D 1/18 (2006.01); C21D 9/42 (2006.01); B21B 1/38 (2006.01); B32B 15/01 (2006.01); C21D 6/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/42 (2006.01); C22C 38/44 (2006.01); C22C 38/50 (2006.01); C22C 38/54 (2006.01); F41H 5/04 (2006.01);
U.S. Cl.
CPC ...
C21D 9/50 (2013.01); B21B 1/38 (2013.01); B32B 15/00 (2013.01); B32B 15/011 (2013.01); C21D 1/18 (2013.01); C21D 6/004 (2013.01); C21D 6/005 (2013.01); C21D 6/008 (2013.01); C21D 8/0205 (2013.01); C21D 8/0226 (2013.01); C21D 8/0247 (2013.01); C21D 8/0263 (2013.01); C21D 8/0421 (2013.01); C21D 8/0426 (2013.01); C21D 8/0447 (2013.01); C21D 8/0463 (2013.01); C21D 9/42 (2013.01); C21D 9/46 (2013.01); C21D 9/48 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C22C 38/42 (2013.01); C22C 38/44 (2013.01); C22C 38/50 (2013.01); C22C 38/54 (2013.01); B21B 2001/383 (2013.01); B21B 2001/386 (2013.01); B32B 2307/536 (2013.01); C21D 2211/001 (2013.01); C21D 2211/008 (2013.01); C21D 2251/02 (2013.01); F41H 5/045 (2013.01);
Abstract

A dual-hardness clad steel plate. One surface of the steel plate is a high-hardness layer, the other surface of the steel plate is a low-hardness layer, and a combination of atoms is achieved between the high-hardness layer and the low-hardness layer by rolling bonding, wherein Mn13 steel is adopted for the low-hardness layer, and the Brinell hardness of the high-hardness layer is greater than 600. Further disclosed is a production method of the dual-hardness clad steel plate, comprising: 1) respectively preparing a high-hardness layer slab and a low-hardness layer slab; 2) assembling: preprocessing combined faces of the slabs, carrying out peripheral welded sealing on joint faces of the slabs, and carrying out vacuumizing treatment on a composite slab after welded sealing; 3) heating; 4) carrying out composite rolling; 5) cooling; and 6) carrying out thermal treatment, wherein the heating temperature is 1050-1100° C., the heating time is 2-3 min/mm×slab thickness, and water cooling is performed on the heated slab, and the water temperature is lower than 40° C. The steel plate has different hardness characteristics and good low-temperature toughness.

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