High temperature die lubricant

Claim 1

IN THE ART OF PRESS FORGING OF METALS WHEREIN THE DIES ARE ELECTRICALLY HEATED TO TEMPERATURES IN THE RANGE OF FROM 600*F. TO 1800*F. INDEPENDENT OF THE CONDUCTION OF HEAT THERETO BY THE HEATED FORGING STOCK, THE METHOD OF LUBRICATING THE HEATED DIE CAVITIES TO INSURE FILLING THEREOF, READY RELEASE OF THE FORGING FROM THE DIES AND HAVING NO DELETERIOUS EFFECTS ON THE DIE SURFACES CONSISTING OF COATING THE HEATED DIE CAVITIES WITH A LUBRICATING COMPOSITION, SAID LUBRICATING COMPOSITION CONSISTING OF A POWDERED FUSIBLE ALKALI METAL SALT NONREACTIVE TO THE HEATED DIE SURFACES AND SELECTED FROM THE GROUP CONSISTING OF POTASSIUM SULFATE, POTASSIUM BISULFATE, POTASSIUM BISULPHIDE, LITHIUM CHLORIDE, POTASSIUM IODIDE AND MIXTURES THEREOF, AND A FINELY DIVIDED LUBRICANT DISPERSED IN SAID CARRIER, THE LUBRICANT BEING CHEMICALLY INERT WITH RESPECT TO THE CARRIER AND TO THE HEATED DIE SURFACES AND STABLE AT FORGING TEMPERATURES, THE LUBRICANT BEING CARRIED BY THE MOLTEN CARRIER INTO ALL PARTS OF THE DIES IN CONTACT WITH THE HEATED FORGING STOCK, THE LUBRICANT BEING SELECTED FROM THE GROUP CONSISTING OF POWDERED MICA, TALC, WESTERN BENTONITE, AND FLAKED GRAPHITE, THE CARRIER VARYING FROM 25% TO ABOUT 60% BY VOLUME OF THE LUBRICATING COMPOSITION.