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:
May. 20, 2003
Filed:
Dec. 29, 1999
Nobuo Sakate, Hiroshima, JP;
Shoji Hirabara, Kure, JP;
Kazuo Sakamoto, Hiroshima, JP;
Yukio Yamamoto, Hiroshima, JP;
Mazda Motor Corporation, Hiroshima, JP;
Abstract
In a semi-solid alloy including a large amount of a liquid phase portion, that is, semi-solid alloy with less than 50% of solid phase rate, there is a tendency for a solid phase portion to concentrate into the central portion in the direction of thickness, that is the internal portion. In order to enhance corrosion resistance at a portion where high corrosion resistance is particularly required in parts molded by semi-solid injection, the above tendency is utilized. By utilizing the tendency, a layer consisting of a liquid phase portion is partially formed at the semi-solid state on a surface portion where high corrosion resistance is required.