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:
Oct. 29, 1985
Filed:
Jun. 02, 1983
Emilio Marino, Rome, IT;
Aldo Ramacciotti, Rome, IT;
Centro Sperimentale Metallurgico S.p.A., Rome, IT;
Abstract
A nozzle for the casting of aluminium-killed steel, which is prepared from pellets obtained by mixing 90-99% Ca(OH).sub.2, with at least one compound selected from the metal oxides Fe.sub.2 O.sub.3, Al.sub.2 O.sub.3 and TiO.sub.2 and the chlorides CaCl.sub.2, NaCl and LiCl, in quantities between 1 and 10%, the mixture being pelletized, dried at 100.degree.-150.degree. C. and baked at 800.degree.-1500.degree. C., grounded and screened, the screened material then being further mixed with at least one compound selected from among the metallic oxides Fe.sub.2 O.sub.3, Al.sub.2 O.sub.3, TiO.sub.2, ZrO.sub.2, and Cr.sub.2 O.sub.3 and MoO.sub.3 and the chlorides CaCl.sub.2, NaCl and LiCl in quantities between 3 and 20% by weight, as well as with organic binders and carriers such as oil, paraffin, petroleum, lower alcohols and resins in quantities between 1 and 5%. The mix is pressed in molds at 500-1500 kg/cm.sup.2 and baked at 1500.degree.-1800.degree. C., the body thus obtained then being vacuum-impregnated with molten pitch and cooked at about 700.degree. C. in a reducing atmosphere.