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. 21, 1989
Filed:
Nov. 05, 1987
Hakaru Nakato, Chiba, JP;
Tsutomu Nozaki, Chiba, JP;
Yasuhiro Habu, Chiba, JP;
Hiromu Oka, Chiba, JP;
Tsunehiro Ueda, Chiba, JP;
Takao Koshikawa, Chiba, JP;
Hideaki Kishimoto, Kobe, JP;
Fumitaka Shimokawa, Kobe, JP;
Kawasaki Steel Corporation, Kobe, JP;
Sakai Chemical Industriy Co., Ltd., Kobe, JP;
Abstract
A mold additive for use in continuous casting, which includes a base material having a chemical composition of CaO--BaO--SiO.sub.2 --F system, and contains 2-15% by weight in total of at least one carbonate of alkali and alkaline earth metals, 2-30% by weight in total of at least one fluoride of alkali and alkaline earth metals and 0.2-10% by weight of carbon, and, if necessary, 2-10% by weight in total of at least one oxide of Fe, Mn and Ni, and has a solidification temperature of not more than 900.degree. C. and a viscosity at 1,300.degree. C. of not more than 3 poises. The base material has a weight ratio of (CaO+BaO)/SiO.sub.2 of 0.6-2.5 and contains not less than 2% by weight of BaO and 2-15% by weight of F.