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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 10378072 B1

PDFFull Text
Date of Patent:
Aug. 13, 2019

Filed:

May. 13, 2016

Maraging steel

Applicant:

Daido Steel Co., Ltd., Nagoya-shi, JP;

Inventors:

Keita Hinoshita, Nagoya, JP;

Kenji Sugiyama, Nagoya, JP;

Hiroyuki Takabayashi, Nagoya, JP;

Shigeki Ueta, Nagoya, JP;

Assignee:

DAIDO STEEL CO., LTD., Nagoya-shi, Aichi, JP;

Attorney:

McGinn I.P. Law Group, PLLC.

Primary Examiner:

Matthew E Hoban

Assistant Examiner:

Anthony M Liang

Int. Cl.
CPC ...
C21D 6/02 (2006.01); C21D 6/00 (2006.01); C21D 6/04 (2006.01); C21D 7/13 (2006.01); C21D 1/25 (2006.01); C22C 38/06 (2006.01); C22C 38/44 (2006.01); C22C 38/50 (2006.01); C22C 38/52 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/46 (2006.01); C22C 38/48 (2006.01); C22C 38/54 (2006.01);
U.S. Cl.
CPC ...
C21D 6/02 (2013.01); C21D 1/25 (2013.01); C21D 6/004 (2013.01); C21D 6/007 (2013.01); C21D 6/04 (2013.01); C21D 7/13 (2013.01); C22C 38/001 (2013.01); C22C 38/002 (2013.01); C22C 38/02 (2013.01); C22C 38/06 (2013.01); C22C 38/44 (2013.01); C22C 38/46 (2013.01); C22C 38/48 (2013.01); C22C 38/50 (2013.01); C22C 38/52 (2013.01); C22C 38/54 (2013.01); C21D 2211/008 (2013.01);
Abstract

The present invention relates to a maraging steel containing, in terms of mass %, 0.10≤C≤0.35, 9.0≤Co≤20.0, 1.0≤(Mo+W/2)≤2.0, 1.0≤Cr≤4.0, a certain amount of Ni, a certain amount of Al, and V+Nb≤0.60, with the balance being Fe and inevitable impurities, in which in a case of V+Nb≤0.020, the amount of Ni is 6.0≤Ni≤9.4 and the amount of Al is 1.4≤Al≤2.0, and in a case of 0.020<V+Nb≤0.60, the amount of Ni is 6.0≤Ni≤20.0 and the amount of Al is 0.50≤Al≤2.0.

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