Production of clad steel plates by the 2-ply method

Claim 1

A METHOD OF PRODUCING A HEAVY CLAD STEEL PLATE COMPRISING FORMING A BASE METAL STEEL SLAB HAVING A DEPRESSION FORMED BY A RAISED PORTION EXTENDINGG LATERALLY FROM THE SIDE EDGES THEREOF, ASSEMBLING IN SAID DEPRESSION A CLADDING SLAB OF A NON-CORROSIVE METAL HAVING A HIGHER COEFFICIENT OF EXPANSION THAN THAT OF SAID BASE SLAB AND HAVING A THICKNESS SUBSTANTIALLY GREATER THAN THE DEPTH OF THE DEPRESSION, LEAVING A RECESS BETWEEN THE RAISED PORTIONS OF SIAD BASE SLAB AND THE SIDE EDGES OF SAID CLADDING SLAB, THE DEPTH OF THE RAISED PORTION FROM THE BASE OF THE DEPRESSION BEING APPROXIMATELY TWO-THIRDS THE THICKNESS OF THE CLADDING SLAB AFTER ASSEMBLY, AT LEAST PARTIALLY FILLING SAID RECESS WITH MALLEABLE METAL RODS, AT LEAST SOME OF SAID RODS BEING OF A DIAMETER TO SUBSTANTIALLY FILL SAID RECESS, SEALING SAID RECESS BY DEPOSITING WELDING MATERIAL IN SAID RECESS OVER SAID RODS, HEATING THE ASSEMBLY TO A TEMPERATURE OF BETWEEN APPROXIMATELY 1800*F. AND 2000*F., AND CAUSING SAID RODS TO BE DISTORTED DUE TO THE EXPANSION OF THE SIDES CLADDING SLAB, LIGHTLY ROLLING THE ASSEMBLY UNTIL THE THICKNESS OF THE ASSEMBLY HAS BEEN REDUCED IN THICKNESS, REHEATING THE ASSEMBLY AT A TEMPERATURE OF BETWEEN 1950*F. TO 2050*F., AND REROLLING THE ASSEMBLY TO FINAL PLATE THICKNESS.

Claim 2

A METHOD OF PRODUCING A HEAVY CLAD STEEL PLATE COMPRISING FORMING A BASE METAL STEEL SLAB HAVING A DEPRESSION FORMED BY A RAISED PORTION EXTENDINGG LATERALLY FROM THE SIDE EDGES THEREOF, ASSEMBLING IN SAID DEPRESSION A CLADDING SLAB OF A NON-CORROSIVE METAL HAVING A HIGHER COEFFICIENT OF EXPANSION THAN THAT OF SAID BASE SLAB AND HAVING A THICKNESS SUBSTANTIALLY GREATER THAN THE DEPTH OF THE DEPRESSION, LEAVING A RECESS BETWEEN THE RAISED PORTIONS OF SIAD BASE SLAB AND THE SIDE EDGES OF SAID CLADDING SLAB, THE DEPTH OF THE RAISED PORTION FROM THE BASE OF THE DEPRESSION BEING APPROXIMATELY TWO-THIRDS THE THICKNESS OF THE CLADDING SLAB AFTER ASSEMBLY, AT LEAST PARTIALLY FILLING SAID RECESS WITH MALLEABLE METAL RODS, AT LEAST SOME OF SAID RODS BEING OF A DIAMETER TO SUBSTANTIALLY FILL SAID RECESS, SEALING SAID RECESS BY DEPOSITING WELDING MATERIAL IN SAID RECESS OVER SAID RODS, HEATING THE ASSEMBLY TO A TEMPERATURE OF BETWEEN APPROXIMATELY 1800*F. AND 2000*F., AND CAUSING SAID RODS TO BE DISTORTED DUE TO THE EXPANSION OF THE SIDES CLADDING SLAB, LIGHTLY ROLLING THE ASSEMBLY UNTIL THE THICKNESS OF THE ASSEMBLY HAS BEEN REDUCED IN THICKNESS, REHEATING THE ASSEMBLY AT A TEMPERATURE OF BETWEEN 1950*F. TO 2050*F., AND REROLLING THE ASSEMBLY TO FINAL PLATE THICKNESS.