Process of preparing composite metal products

Claim 1

THE PROCESS OF MAKING COMPOSITE METAL PLATES HAVING CORROSION-RESISTANT FACINGS WHICH INCLUDES FORMING A PACK IN WHICH A PAIR OF CORROSION-RESISTANT METAL SHEETS ARE ARRANGED IN FACE TO FACE RELATION AND SANDWICHED BETWEEN TWO METAL SLABS, ONE OF SAID SHEETS BEING COMPOSED OF SUBSTANTIALLY PURE TITANIUM AND THE OTHER BEING COMPOSED OF AN ALLOY OF IRON AND CHROMIUM ONLY, AND WHEREIN SAID ALLOY CONTAINS FROM APPROXIMATELY ELEVEN PERCENT TO APPROXIMATELY THIRTY PERCENT CHROMIUM, EXTENDING THEE EDGES OF SAID SLABS BEYOND THE EDGES OF SAID SHEETS TO FORM A CONTINUOUS OUTWARDLY-OPENING RECESS AROUND THE EDGES OF SAID PACK, HERMETICALLY SEALING THE OPEN SIDE OF SAID RECESS TO FORM A GAS TIGHT CHAMBER ADJACENT THE EDGES OF SAID SHEETS, PROVIDING SAID PACK WITH MEANS TO CONVEY A GAS TO AND FROM SAID CHAMBER, HEATING SAID PACK TO A TEMPERATURE BETWEEN 1450*F. AND 1650*F. FOR A PERIOD OF BETWEEN ONE-HALF AND ONE AND ONE-HALF HOURS PER INCH OF PACK THICKNESS WHILE MAINTAINING A FLOW OF AN INERT GAS THROUGH SAID CHAMBER TO REDUCE THE FORMATION OFF OXIDE FILM IN SAID PACK, SAID SUBJECTING SAID PACK TO A PRESSURE SUFFICIENT TO EFFECT A REDUCTION IN ITS THICKNESS OF AT LEAST FOUR TO ONE AND A BONDING OF SAID TITANIUM SHEET TO ONE OF SAID SLABS WITH THE ALLOY SHEET BETWEEN THEM, SAID SLABS BEING FORMED OF STEEL, AND THE PRESSURE ON THE PACK BEING EFFECTED BY A ROLLING STEP..