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. 25, 1998
Filed:
Jul. 15, 1996
Keishi Nogami, Sakai, JP;
Masato Koide, Sakai, JP;
Takashi Morimoto, Sakai, JP;
Yutaka Koshiba, Tokyo, JP;
Mitsubishi Materials Corporation, Tokyo, JP;
Abstract
A method for producing copper alloy materials for molds for continuous steel casting and molds as produced by the method. The molds are highly resistant to thermal fatigue and are hardly cracked. To produce the materials, cast ingots of a copper-based chromium-zirconium alloy comprising from 0.2 to 1.5% by weight of Cr and from 0.02 to 0.2% by weight of Zr are heated at between 900.degree. C. and 1000.degree. C. for 30 minutes or longer and then rolled, while hot, at a reduction ratio of 60% or more to be at 850.degree. C. or higher at which the hot rolling is finished , and immediately after the hot rolling, these are rapidly cooled to 400.degree. C. or lower at a cooling rate of 10.degree.C./sec or more, and then aged at between 400.degree. C. and 520.degree. C. for from 1 hour to 5 hours.