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:
Feb. 24, 2015
Filed:
Nov. 08, 2007
Hideo Koumura, Tokyo, JP;
Akihiko Furuta, Tokyo, JP;
Yoshito Furuya, Tokyo, JP;
Hideo Ogishi, Tokyo, JP;
Susumu Sato, Tokyo, JP;
Rie Umebayashi, Tokyo, JP;
Satoru Ando, Hiroshima, JP;
Shigeru Takano, Chiba, JP;
Hideo Koumura, Tokyo, JP;
Akihiko Furuta, Tokyo, JP;
Yoshito Furuya, Tokyo, JP;
Hideo Ogishi, Tokyo, JP;
Susumu Sato, Tokyo, JP;
Rie Umebayashi, Tokyo, JP;
Satoru Ando, Hiroshima, JP;
Shigeru Takano, Chiba, JP;
JFE Galvanizing & Coating Co., Ltd., , JP;
JFE Steel Corporation, , JP;
Abstract
A hot-dip Zn—Al alloy coated steel sheet exhibiting a beautiful coating appearance with metallic luster, in which no spangle or very fine spangles are formed, and having excellent blackening resistance and a method for manufacturing the hot-dip Zn—Al alloy coated steel sheet are provided. The hot-dip Zn—Al alloy coated steel sheet includes a hot-dip Zn—Al alloy coating layer containing 1.0 to 10 percent by mass of Al, 0.2 to 1.0 percent by mass of Mg, 0.005 to 0.1 percent by mass of Ni, and the balance being Zn and incidental impurities on at least one surface of a steel sheet. The manufacturing method includes the steps of dipping the steel sheet into a hot-dip Zn—Al alloy coating bath and pulling up and cooling the steel sheet, wherein the steel sheet pulled up from the coating bath is cooled to 250° C. at a cooling rate of 1° C. to 15° C./sec.