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AssigneeLondon & Scandinavian Metallurgical Co., Ltd.
InventorsPeter Davies, James Leslie Frederick Kellie, Richard Nigel McKay, John Vivian Wood
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The invention provides a method of making a titanium carbide metal matrix alloy, by firing a particulate reaction mixture comprising carbon, titanium and matrix material, under conditions such that the titanium and carbon react exothermically to form a dispersion of fine particles comprising titanium carbide (preferably less than 10 microns) in a predominantly metal matrix. The titanium and matrix are preferably added as a titanium alloy such as ferrotitanium, e.g. eutectic ferrotitanium. The reaction conditions are preferably selected so that during the reaction a molten zone moves through the body of the reaction mixture; the resulting hard particles are of globular form; and their average size is uniform throughout the resulting dispersion.
A method of making an alloy comprising hard particles comprising titanium carbide dispersed in a metal matrix, the method comprising firing a body of loose particulate reaction mixture comprising carbon, titanium and matrix material, wherein said firing is accomplished by applying heat to only a portion of the body of loose particulate reaction mixture so as to initiate an exothermic reaction, under conditions whereby the titanium and carbon react exothermically to form a dispersion of fine particles comprising titanium carbide in a metal matrix, said titanium being present in the reaction mixture as an alloy of matrix metal and titanium, and the body of the particulate reaction mixture is at a temperature less than 600 degrees C. immediately prior to firing.
Dependencies are inferred from the claim text.