Process for the production of a composite metal article comprising a bimetallic sheet, and moulding apparatus for use in the production of a bimetallic sheet

摘要

PROCESS FOR THE PRODUCTION OF A COMPOSITE METAL ARTICLE UNDER A BIMETAL CHAP, AND APPROVAL OF MOLDAGE FOR USE IN THE PRODUCTION OF A BIMETAL CHAP" IS A BIMETAL PLATE PLATE produced by the provision of a first metal substrate (S) and, with the pre-heated substrate (S) positioned in a mould cavity (34) with a main substrate surface (S) facing up and for filling a part of the cavity depth (34),a second metal being fused against that surface to form a coating component and, with the substrate (S),Forming the bi-metallic plate. Prior to the casting of the coating, the main surface is made substantially free of oxides and protected from oxidation. The coating is fused by a bath, of a composition required for it, and is cooled to a superheated temperature in which, in this way, with preheating the substrate (S),a general heat energy balance is achieved between the substrate (S) and the coating. The thermal energy balance allows for the achievement of a diffusion link between the main surface of the substrate (S) and the coating, and the attainment of energy balance is facilitated by the bath entering the mould cavity (34) through a series of floodgates (44) which provide communication between at least a distribution channel (40) and the mould cavity (34). The series of floodgates (44) are arranged laterally in relation to the flow of the bath through them,the bath thus forming a bath front extending laterally. The achievement of the thermal energy balance is additionally facilitated by moving the bath front away from the floodgates (44),on the surface of the substrate (S),at a substantially uniform rate through the lateral extension of the material front.