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. 06, 2012
Filed:
Sep. 26, 2008
Suguru Yoshida, Tokyo, JP;
Hiroshi Kita, Tokyo, JP;
Teruhisa Okumura, Tokyo, JP;
Hirokazu Sugiyama, Tokyo, JP;
Teruyuki Wakatsuki, Tokyo, JP;
Suguru Yoshida, Tokyo, JP;
Hiroshi Kita, Tokyo, JP;
Teruhisa Okumura, Tokyo, JP;
Hirokazu Sugiyama, Tokyo, JP;
Teruyuki Wakatsuki, Tokyo, JP;
Nippon Steel Corporation, Tokyo, JP;
Abstract
The present invention provides a high strength thick steel material excellent in toughness and weldability reduced in amount of C and amount of N, containing suitable amounts of Si, Mn, Nb, Ti, B, and O, having contents of C and Nb satisfying C—Nb/7.74≦0.004, having a density of Ti-containing oxides of a particle size of 0.05 to 10 μm of 30 to 300/mm, and having a density of Ti-containing oxides of a particle size over 10 μm of 10/mmor less, produced by treating steel by preliminary deoxidation to adjust the dissolved oxygen to 0.005 to 0.015 mass %, then adding Ti and, furthermore, vacuum degassing the steel for 30 minutes or more, smelting it, then continuously casting it to produce a steel slab or billet, heating the steel slab or billet to 1100 to 1350° C., hot rolling the slab or billet to a thickness of 40 to 150 mm, then cooling it.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile