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:
Jul. 13, 2010
Filed:
Jul. 21, 2006
Manabu Kubota, Futtsu, JP;
Suguru Yoshida, Futtsu, JP;
Toshimi Tarui, Futtsu, JP;
Hideki Matsuda, Wako, JP;
Koki Mizuno, Wako, JP;
Tadashi Ohya, Wako, JP;
Manabu Kubota, Futtsu, JP;
Suguru Yoshida, Futtsu, JP;
Toshimi Tarui, Futtsu, JP;
Hideki Matsuda, Wako, JP;
Koki Mizuno, Wako, JP;
Tadashi Ohya, Wako, JP;
Nippon Steel Corporation, Tokyo, JP;
Honda Motor Co., Ltd., Tokyo, JP;
Abstract
Steel and steel shaped articles with an excellent delayed fracture resistance and a tensile strength of the 1600 MPa class or more, containing, by mass %, C: 0.20 to 0.60%, Si: 0.50% or less, Mn: over 0.10% to 3%, Al: 0.005 to 0.1%, Mo: over 3.0% to 10%, and, as needed, one or more of W: 0.01 to 10%, V: 0.05 to 1%, Ti: 0.01 to 1%, Nb: 0.01 to 1%, Cr: 0.10 to 2%, Ni: 0.05 to 1%, Cu: 0.05 to 0.5%, and B: 0.0003 to 0.01%, and a balance of Fe and unavoidable impurities and, further, a method of production comprising shaping the above steel to a desired shape (for example, a bolt shape), quenching it, then tempering it at 500 to 750° C. in temperature range.