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:
Aug. 17, 2021
Filed:
Jan. 10, 2020
Nippon Steel Nisshin Co., Ltd., Tokyo, JP;
Ns Wheeling-nisshin, Inc., Follansbee, WV (US);
Koutarou Ishii, Tokyo, JP;
Shinya Furukawa, Tokyo, JP;
Shinichi Koga, Tokyo, JP;
Yasunori Hattori, Tokyo, JP;
Patrick Edward Pendleton, Follansbee, WV (US);
Kazuhiro Yamada, Follansbee, WV (US);
NIPPON STEEL NISSHIN CO., LTD., Tokyo, JP;
NS Wheeling-Nisshin, Inc., Follansbee, WV (US);
Abstract
A hot-dip coating equipment includes a cooling rate determining device that includes: a coefficient obtaining section configured to obtain coefficients α, β, γ, and δ associated with the hot-dip coating bath, in the following equation that expresses a degree of discoloration YI of the surface of a hot-dip coated steel sheet; and a rate determining section configured to determine an average cooling rate A so as to allow the YI of the following Expression (1) to be not more than a predetermined reference value, YI =(α×[SE]+β)×{(T−ST)/A}+γ×[SE]+δ . . . (1), where: [SE] is a concentration (mass %) of a specific element contained in the hot-dip coating bath; T is a temperature (° C.) of the hot-dip coating bath; and ST is a solidification temperature (° C.) at which the hot-dip coating bath is solidified.