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:
Oct. 15, 2013
Filed:
Jul. 15, 2011
Shingo Yamasaki, Kimitsu, JP;
Daisuke Hirakami, Futtsu, JP;
Toshimi Tarui, Futtsu, JP;
Seiki Nishida, Kimitsu, JP;
Shingo Yamasaki, Kimitsu, JP;
Daisuke Hirakami, Futtsu, JP;
Toshimi Tarui, Futtsu, JP;
Seiki Nishida, Kimitsu, JP;
Nippon Steel & Sumitomo Metal Corporation, Tokyo, JP;
Abstract
The invention provides a steel material with satisfactory hydrogen embrittlement resistance, and particularly it relates to high-strength steel with satisfactory hydrogen embrittlement resistance and a strength of 1200 MPa or greater, as well as a process for production thereof. At least one simple or compound deposit of oxides, carbides or nitrides as hydrogen trap sites which trap hydrogen with a specific trap energy is added to steel, where the mean sizes, number densities, and length-to-thickness ratios (aspect ratio) are in specific ranges. By applying the specific steel components and production process it is possible to obtain high-strength steel with excellent hydrogen embrittlement resistance.