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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 10787719 B1

PDFFull Text
Date of Patent:
Sep. 29, 2020

Filed:

Sep. 29, 2016

High-speed tool steel, material for tools, and method for producing material for tools

Applicant:

Hitachi Metals, Ltd., Tokyo, JP;

Inventor:

Shiho Fukumoto, Shimane, JP;

Assignee:

Hitachi Metals, Ltd., Tokyo, JP;

Attorney:

JCIPRNET

Primary Examiner:

Jie Yang

Int. Cl.
CPC ...
C21D 6/02 (2006.01); C21D 8/00 (2006.01); C22C 38/30 (2006.01); C22C 38/00 (2006.01); C21D 9/24 (2006.01); C21D 9/22 (2006.01); C21D 6/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/22 (2006.01); C22C 38/24 (2006.01);
U.S. Cl.
CPC ...
C21D 8/005 (2013.01); C21D 6/002 (2013.01); C21D 6/005 (2013.01); C21D 6/007 (2013.01); C21D 6/008 (2013.01); C21D 6/02 (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 38/22 (2013.01); C22C 38/24 (2013.01); C22C 38/30 (2013.01);
Abstract

Provided are a high-speed tool steel having excellent hot workability, and excellent damage resistance when made into various tools; a material for tools, and a method for producing the same. The high-speed tool steel contains, in mass %, 0.9-1.2% of C, 0.1-1.0% of Si, 1.0% or less of Mn, 3.0-5.0% of Cr, 2.1-3.5% of W, 9.0-10.0% of Mo, 0.9-1.2% of V, 5.0-10.0% of Co, 0.020% or less of N, and the remainder being Fe and impurities, wherein an M value calculated by a formula satisfies −1.5≤M value≤1.5. Formula: M value=−9.500+9.334[% C]−0.275[% Si]−0.566[% W]−0.404[% Mo]+3.980[% V]+0.166[% Co], where the characters in brackets [ ] indicate the contained amounts (mass %) of the respective elements. The present invention also pertains to: a material for tools, which is obtained by using the high-speed tool steel; and a method for producing the material for tools.

Find Patent Forward Citations

Fukumoto, Shiho. (2020). High-speed tool steel, material for tools, and method for producing material for tools (U.S. Patent No. 10787719). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/10787719

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