Mould powder and mould coating
AssigneeElkem ASA
InventorsFrancois Guillemin, Mourad Toumi
Life of this patent
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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 CaF2. 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 CaF2.
Claims23
A mould powder for coating the internal surface of one or more casting moulds, comprising
- 10-99.5% by weight of a ferrosilicon alloy,
- 3-50% by weight of an iron sulphide, and optionally
- 1-30% by weight of CaSi alloy, and/or
- 1-10% by weight of CaF2.
A mould coating on an internal surface of a casting mould, said mould coating comprising
- 10-99.5% by weight of a ferrosilicon alloy,
- 3-50% by weight of an iron sulphide, and optionally
- 1-30% by weight of CaSi alloy, and/or
- 1-10% by weight of CaF2.
Dependencies are inferred from the claim text.