Process and apparatus for desurfacing a refractory metal body

Claim 2

PROCESS OF DESURFACING A REFRACTORY METAL BODY, WHICH COMPRISES APPLYING PREHEAT TO A LOCAL SURFACE PORTION OF SUCH BODY, DISCHARGING A RELATIVELY FLAT STREAM OF OXIDIZING GAS AT AN ACUTE ANGLE AGAINST SUCH HEATED POR TION, PROJECTING A ROW OF STEAMS OF POWDERED SOLID FUEL LADEN GAS AT AN ACUTE ANGLE AGAINST COPLANAR SURFACES OF HARD EROSION RESISTANT CARBIDE MATERIAL, DISCHARGING THE RESULTANT SEPARATE FLAT STREAM OF GAS CONTAINING INIFORMLY TRANSVERSELY DISTRIBUTED POWDERED SOLID FUEL AT AN ACUTE ANGLE TOWARD SUCH OXIDIZING GAS STREAM, SO THAT THE CEN TRAL PLANES OF SUCH STREAMS IN THE DIRECTION OF FLOW THEREOF FROM DIHEDRAL ANGLES WITH ONE ANOTHER AND WITH SUCH SURFACE PORTION OF THE BODY, AND RELATIVELY MOVING SUCH STREMS AND THE BODY SO THAT SUCCESSIVE SURFACE PORTION THEREOF ARE PROGRESSIVELY REMOVED THERMOCHEMICALLY BY THE SCARFING ACTION OF THE COMBINED POWDERED SOLID FUEL AND OXIDIZING GAS STREAM.

Claim 3

APPARATUS FOR DESURFACING A REFRACTORY METAL BODY, WHICH COMPRISES MEANS FOR APPLYING PREHEAT TO A LOCAL SURFACE PORTION OF SUCH BODY, MEANS FOR DISCHARGING RELATIVELY FLAT STREAM OF OXIDIZING GAS AT AN ACUTE ANGLE AGAINST SUCH HEATED PORION, MEANS FOR PROJECTING A ROW OF STREAMS OF POWDERED SOLID FUEL-LADEN GAS AT AN ACUTE ANGLE AGAINST COPLANAR SURFACVES OF HARD EROSION RESISTANT CARBIDE MATERIAL, MEANS FOR DISCHARGING THE RESULTANT SEPARATED FLAT STREAM OF GAS CONTAINING UNIFORMLY TRANSVERSELY DISTRIBUTED POWDERED SOLID FUEL AT AN ACUTE ANGLE TOWARD SUCH OXIDIZING GAS STEAM, SO TAHT THE CENTRAL PLANES OF SUCH STREAMS IN THE DIRECTION OF FLOW THEREOF FORM DIHEDRAL ANGLES WITH ONE ANOTHER AND WITH SUCH SURFACE PORTION OF THE BODY, AND MEANS FOR RELATIVELY MOVING SUCH STEAMS AND THE BODY SO THAT SUCCESSIVE SURFACE PORTIONS THEREOF ARE PROGRESSIVELY REMOVED THERMOCHEMICCALLY BY THE COMBINED SCARFING ACTION OF THE POWDERED SOLID FUEL AND OXIDIZING GAS STREAM.

Claim 4

APPARATUS FOR DESURFACING A REFRACTORY METAL BODY, WHICH COMPRISES MEANS FOR APPLYING PREHEAT TO A LOCAL SURFACE PORTION OF SUCH BODY, MEANS FOR DISCHARGING RELATIVELY FLAT STREAM OF OXIDIZING GAS AT AN ACUTE ANGLE AGAINST SUCH HEATED PORION, MEANS FOR PROJECTING A ROW OF STREAMS OF POWDERED SOLID FUEL-LADEN GAS AT AN ACUTE ANGLE AGAINST COPLANAR SURFACVES OF HARD EROSION RESISTANT CARBIDE MATERIAL, MEANS FOR DISCHARGING THE RESULTANT SEPARATED FLAT STREAM OF GAS CONTAINING UNIFORMLY TRANSVERSELY DISTRIBUTED POWDERED SOLID FUEL AT AN ACUTE ANGLE TOWARD SUCH OXIDIZING GAS STEAM, SO TAHT THE CENTRAL PLANES OF SUCH STREAMS IN THE DIRECTION OF FLOW THEREOF FORM DIHEDRAL ANGLES WITH ONE ANOTHER AND WITH SUCH SURFACE PORTION OF THE BODY, AND MEANS FOR RELATIVELY MOVING SUCH STEAMS AND THE BODY SO THAT SUCCESSIVE SURFACE PORTIONS THEREOF ARE PROGRESSIVELY REMOVED THERMOCHEMICCALLY BY THE COMBINED SCARFING ACTION OF THE POWDERED SOLID FUEL AND OXIDIZING GAS STREAM.