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. 19, 1980
Filed:
Oct. 19, 1978
Hideto Watanabe, Kurashiki, JP;
Shigeo Shoji, Kurashiki, JP;
Akimune Sato, Kurashiki, JP;
Takashi Oka, Kyoto, JP;
Kawasaki Steel Corporation, Kobe, JP;
Toyo Calorizing Ind. Co., Ltd., Kobe, JP;
Abstract
A blast-furnace tuyere having excellent thermal shock resistance and high durability consists of a tuyere substrate composed of copper or copper alloy, a self-fluxing alloy metallized layer sprayed on the substrate, a cermet coating sprayed on the alloy metallized layer, and a ceramic coating sprayed on the cermet coating. The cermet coating is made from a mixture of an alloy material consisting essentially of 5 to 60 wt% of Co, 5 to 50 wt% of Ni, 5 to 25 wt% of Cr, 5 to 40 wt% of Mo, 5 to 40 wt% of W, 3 to 40 wt% of Si and inevitable impurities, and a ceramic eutectic material consisting essentially of 95 to 65 wt% of Al.sub.2 O.sub.3, 5 to 30 wt% of ZrO.sub.2, 2 to 20 wt% of TiO.sub.2, 3 to 30 wt% of SiO.sub.2 and inevitable impurities. The ceramic coating is made from the same ceramic material as used in the formation of the cermet coating.