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.:
Date of Patent:
Nov. 29, 2016
Filed:
Jun. 05, 2013
Shigeki Ueta, Aichi, JP;
Hiroyuki Takabayashi, Aichi, JP;
Ei Kimura, Aichi, JP;
Yuta Tanaka, Tokyo, JP;
Satoshi Takahashi, Tokyo, JP;
Isao Nakanowatari, Tokyo, JP;
Kota Sasaki, Tokyo, JP;
Koshiro Yamane, Tokyo, JP;
Satoru Yusa, Tokyo, JP;
Shigeki Ueta, Aichi, JP;
Hiroyuki Takabayashi, Aichi, JP;
Ei Kimura, Aichi, JP;
Yuta Tanaka, Tokyo, JP;
Satoshi Takahashi, Tokyo, JP;
Isao Nakanowatari, Tokyo, JP;
Kota Sasaki, Tokyo, JP;
Koshiro Yamane, Tokyo, JP;
Satoru Yusa, Tokyo, JP;
DAIDO STEEL CO., LTD., Aichi, JP;
IHI CORPORATION, Tokyo, JP;
Abstract
The present invention provides a maraging steel containing: 0.10≦C≦0.30 mass %, 6.0≦Ni≦9.4 mass %, 11.0≦Co≦20.0 mass %, 1.0≦Mo≦6.0 mass %, 2.0≦Cr≦6.0 mass %, 0.5≦Al≦1.3 mass %, and Ti≦0.1 mass %, with the balance being Fe and unavoidable impurities, and satisfying 1.00≦A≦1.08, in which A is 0.95+0.35×[C]−0.0092×[Ni]+0.011×[Co]−0.02×[Cr]−0.001×[Mo], where [C] indicates a content (mass %) of C, [Ni] indicates a content (mass %) of Ni, [Co] indicates a content (mass %) of Co, [Cr] indicates a content (mass %) of Cr, and [Mo] indicates a content (mass %) of Mo, respectively. The maraging steel has a tensile strength of 2,300 MPa or more and is also excellent in the toughness/ductility and fatigue characteristics.