Method and device for producing refractory materials by induction
AssigneeTechnogenia S.A.
InventorsPierre Brunet, Fortunat Esnault, Guy Maybon, Rene Perrier de la Bathie
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Abstract
A method and device are provided for producing refractory materials by induction, in which process a mixture of material powders and a binder in solution in water are compacted by extrusion so as to form a solid bar. The bar is introduced into a cold crucible and is caused to melt by magnetic induction. The molten material flows through a lower orifice of the crucible. The invention applies more particularly to the melting of tungsten carbide.
Claims18
A method of forming refractory material elements by fusion from refractory material powder, including a step during which the material is introduced into a "cold crucible", in the form of a compacted powder having a self supporting form, wherein the material is heated directly by induction up to a temperature higher than its melting temperature, and wherein the electric resistivity of the material is such that the electric current induced in the material is sufficiently intense to melt the material.
A method of forming refractory material elements by fusion from refractory material powder, including a step during which the material is introduced into a "cold crucible", in the form of a compacted powder having a self supporting form, the material being heated directly by induction up to a temperature higher than its melting temperature, the electric resistivity of the material being such that the electric current induced in the material is sufficiently intense to melt the material, the "cold crucible" being formed of a copper cylinder divided into sectors along radial planes and cooled by a fluid flowing through ducts, the cylinder having a bottom and an upper opening for introducing the materials to be melted, the bottom of the crucible having an orifice with an area less than the cross-sectional area of the material being melted, the orifice being permanently open, so that the material to be melted may rest on the bottom of the crucible and flow through the orifice after melting.
Dependencies are inferred from the claim text.