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:
Jan. 19, 2010
Filed:
May. 20, 2004
Tadanobu Inoue, Tsukuba, JP;
Shiro Torizuka, Tsukuba, JP;
Eijiro Muramatsu, Tsukuba, JP;
Kotobu Nagai, Tsukuba, JP;
Tadanobu Inoue, Tsukuba, JP;
Shiro Torizuka, Tsukuba, JP;
Eijiro Muramatsu, Tsukuba, JP;
Kotobu Nagai, Tsukuba, JP;
National Institute for Materials Science, Ibaraki, JP;
Abstract
A method of rolling a material in two more continuous passes is disclosed. The method includes rolling the material with a flattened-shaped caliber in a first pass, and subsequently rolling with a square-shaped caliber in a second pass. The rolling is performed with a first pass caliber having a flattened shape, wherein the ratio of the length (2A) of minor axis of the first pass caliber to an initial width (2A) is (A/A)≦0.75; and a second pass caliber, wherein the ratio of a diagonal dimension (2A) of the second pass caliber to the length (2B) of the major axis of the material after the first pass is (A/B)≦0.75 to introduce the large strain into the material.