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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 10661353 B1

PDFFull Text
Date of Patent:
May. 26, 2020

Filed:

Jun. 21, 2016

Method for producing high-speed tool steel material, method for producing high-speed tool steel product, and high-speed tool steel product

Applicant:

Hitachi Metals, Ltd., Tokyo, JP;

Inventors:

Shiho Fukumoto, Yasugi, JP;

Taishiroh Fukumaru, Tokyo, JP;

Assignee:

HITACHI METALS, LTD., Tokyo, JP;

Attorney:

Sughrue Mion, PLLC

Primary Examiner:

Jie Yang

Int. Cl.
CPC ...
C21D 9/22 (2006.01); B23B 27/14 (2006.01); B23C 5/16 (2006.01); C22C 38/00 (2006.01); B23B 51/00 (2006.01); C22C 38/36 (2006.01); C21D 9/24 (2006.01); C21D 8/00 (2006.01); C21D 8/06 (2006.01); C21D 1/18 (2006.01); C21D 1/26 (2006.01); C21D 6/00 (2006.01); C21D 6/02 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/22 (2006.01); C22C 38/24 (2006.01); C22C 38/30 (2006.01);
U.S. Cl.
CPC ...
B23B 27/148 (2013.01); B23B 27/14 (2013.01); B23B 51/00 (2013.01); B23C 5/16 (2013.01); C21D 1/18 (2013.01); C21D 1/26 (2013.01); C21D 6/002 (2013.01); C21D 6/005 (2013.01); C21D 6/008 (2013.01); C21D 6/02 (2013.01); C21D 8/00 (2013.01); C21D 8/06 (2013.01); C21D 8/065 (2013.01); C21D 9/22 (2013.01); C21D 9/24 (2013.01); C22C 38/00 (2013.01); C22C 38/001 (2013.01); C22C 38/002 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C22C 38/22 (2013.01); C22C 38/24 (2013.01); C22C 38/30 (2013.01); C22C 38/36 (2013.01); C21D 2211/001 (2013.01);
Abstract

Provided are: a method for producing a high-speed tool steel material capable of increasing carbides in the structure of a high-speed tool steel product; a method for producing a high-speed tool steel product; and a high-speed tool steel product. The method for producing a high-speed tool steel material is provided with: a casting step for casting molten steel to obtain a steel ingot; a blooming step for heating the steel ingot obtained in said casting step to a temperature higher than 1120° C. and thereafter hot-working same to obtain an intermediate material; and a finishing step for heating the intermediate material obtained in the blooming step to a temperature of 900-1120° C. and thereafter hot-working same to obtain the high-speed tool steel material. Further, said method for producing a high-speed tool steel material is provided with an annealing step for annealing the high-speed tool steel material obtained in said finishing step. The present invention is also: a method for producing a high-speed tool steel product, wherein quenching and annealing is performed on the high-speed tool steel material obtained in the production method above; and a high-speed tool steel product.

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