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:
Mar. 24, 2015
Filed:
Nov. 08, 2011
Ryo Ishibashi, Tokai, JP;
Masahisa Inagaki, Hitachi, JP;
Hideo Soneda, Hitachi, JP;
Naoya Okizaki, Hitachi, JP;
Tomomi Nakamura, Hitachinaka, JP;
Yoshikazu Todaka, Toyohashi, JP;
Hiroaki Azuma, Nagoya, JP;
Nozomu Adachi, Toyohashi, JP;
Minoru Umemoto, Toyohashi, JP;
Ryo Ishibashi, Tokai, JP;
Masahisa Inagaki, Hitachi, JP;
Hideo Soneda, Hitachi, JP;
Naoya Okizaki, Hitachi, JP;
Tomomi Nakamura, Hitachinaka, JP;
Yoshikazu Todaka, Toyohashi, JP;
Hiroaki Azuma, Nagoya, JP;
Nozomu Adachi, Toyohashi, JP;
Minoru Umemoto, Toyohashi, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
Disclosed is a zirconium alloy material having high corrosion resistance regardless of thermal history during its manufacturing process. The zirconium alloy material is obtained by providing a zirconium alloy containing on the mass basis: 0.001% to 1.9% of Sn, 0.01% to 0.3% of Fe, 0.01% to 0.3% of Cr, 0.001% to 0.3% of Ni, 0.001% to 3.0% of Nb, 0.027% or less of C, 0.025% or less of N, 4.5% or less of Hf and 0.16% or less of O with the remainder being inevitable impurities and zirconium, being formed of a bulk alloy and a surface layer, in which the surface layer has a plastic strain of 3 or more or a Vickers hardness of 260 HV or more and an arithmetic mean surface roughness Ra of 0.2 μm or less.