Method for casting a composite ingot

A method for casting a composite metal ingot comprising at least two separately formed layers of one or more alloys, the method comprises

• (a) providing a solid substrate of a first alloy and a molten melt of a second alloy, the solid substrate being positioned such that an upper surface of the substrate is formed by a long side of the solid substrate;
• (b) providing a casting mould, the substrate and the casting mould being movable relative to one another, and wherein the casting mould comprises a liquid feed end for supplying the casting mould with a molten second alloy and an exit end with at least one outlet for casting the molten second alloy downwardly onto the substrate, and
• (c) while continuously moving the casting mould and the substrate relative to one another in a substantially horizontal direction, casting the molten second alloy downwardly through the at least one outlet of the casting mould onto the upper surface of the substrate at a temperature wherein the substrate locally at least partly remelts beginning at a reference point of a remelting zone and mixes at least partly with the molten second alloy to form an alloy pool, and after the remelting the molten alloy pool continuously cools and solidifies at a location away from the reference point and joins the substrate to form the composite ingot before discharging from the casting mould.