Process for producing refractory powder
AssigneeGTE Products Corporation
InventorsMary Lou Benjamin, Robert J. Dobbs, Mary E. Shaffer
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Abstract
In a process for producing a refractory metal carbide grade powder, a metal carbide powder is heated above melting point of a wax prior to forming a blended mixture of metal carbide and wax which is subsequently milled with a metal binder in liquid milling medium incompatible with the wax and the mixture is dried to form a powder.
Claims13
A process for producing a refractory powder containing an organic binder comprising heating particles of a refractory material to a temperature above the melting point and below the decomposition temperature of said organic binder to form a heated powder of refractory material, said organic binder consisting essentially of a wax, mixing said organic binder with said heated powder to form a blended mixture, milling said blended mixture with a liquid milling medium to produce a slurry, said organic binder being substantially insoluble in said liquid milling medium, and removing substantially all of said milling medium by evaporation below the decomposition temperature of said organic binder to form a refractory powder having an adherent coating of said organic binder.
A process for producing a powder mixture of metal carbide particles, metal binder particles and wax suitable for making a cemented metal carbide comprising forming a mixture of metal carbide particles and wax at a temperature above the melting point of said wax, said metal carbide particles and wax being sufficiently mixed to form a blended mixture of wax and metal carbide particles, milling said blended mixture including metal binder particles with a liquid milling medium to substantially uniformly disperse said metal binder particles and to produce a slurry, said metal binder particles being added prior to or during milling, said wax being substantialy insoluble in said liquid milling medium, drying said slurry to remove said milling medium and produce a powder comprising particles of metal carbide, metal binder and wax.
Dependencies are inferred from the claim text.