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:
Sep. 10, 2024
Filed:
Nov. 28, 2019
Applicant:
Elkem Asa, Oslo, NO;
Inventors:
Francois Guillemin, Ligny en Barrois, FR;
Mourad Toumi, Saint Maximin, FR;
Assignee:
ELKEM ASA, Oslo, NO;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B22F 1/05 (2022.01); B22C 3/00 (2006.01); B22D 13/10 (2006.01);
U.S. Cl.
CPC ...
B22F 1/05 (2022.01); B22C 3/00 (2013.01); B22D 13/102 (2013.01); B22F 2301/056 (2013.01); B22F 2301/35 (2013.01); B22F 2302/45 (2013.01);
Abstract
The present invention relates to a mould powder for coating cast moulds for reducing surface defects, such as pinholes, in ductile cast iron products. The mould powder comprises 10-99.5% by weight of a ferrosilicon alloy, 0.5-50% by weight of iron sulphide, and optionally 1-30% by weight of CaSi, and/or 1-10% by weight of CaF. The invention further relates to a mould coating on and internal surface of a casting mould comprising 10-99.5% by weight of a ferrosilicon alloy, 0.5-50% by weight of iron sulphide, and optionally 1-30% by weight of CaSi, and/or 1-10% by weight of CaF.