Method of brazing and joint produced thereby

Claim 1

THE METHOD OF BRAZING A PAIR OF CORROSION AND OXIDATION RESISTANT HIGH TEMPERATURE ALLOY PARTS TOGETHER; SAID METHOD COMPRISING THE STEPS OF DISPOSING THE SURFACES OF SAID PARTS TO BE BRAZED TOGETHER IN ABUTTING RELATION; PLACING A MIXTURE CONTAINING A BRAZING ALLOY INY IN POWERED FORM ON SAID PARTS ALONG ONE OR MORE EDGES OF SAID ABUTTING SURFACES, SAID MIXTURE INCLUDING A BINDER FOR SAID BRAZING ALLOY AND SAID BRAZING ALLOY CONSISTING ESSENTIALLY OF 8-20% CHROMINUM, 2-5% BORON AND 6585% OF METAL FROM THE GROUP CONSISTING OF NICKEL AND COBALT; THEN HEATING SAID PARTS TO A TEMPERATURE OF AT LEAST 2000* F. FOR MELTING SAID BRAZING ALLOY TO BRAZE SAID PARTS TOGETHER; AND MAINTAINING SAID PARTS IN A DRY REDUCING ATMOSPHERE OF HYDROGEN DURING THE BRAZING OPERATION.

Claim 2

THE METHOD OF BRAZING A PAIR OF CORROSION AND OXIDATION RESISTANT HIGH TEMPERATURE ALLOY PARTS TOGETHER; SAID METHOD COMPRISING THE STEPS OF DISPOSING THE SURFACES OF SAID PARTS TO BE BRAZED TOGETHER IN ABUTTING RELATION; PLACING A MIXTURE CONTAINING A BRAZING ALLOY INY IN POWERED FORM ON SAID PARTS ALONG ONE OR MORE EDGES OF SAID ABUTTING SURFACES, SAID MIXTURE INCLUDING A BINDER FOR SAID BRAZING ALLOY AND SAID BRAZING ALLOY CONSISTING ESSENTIALLY OF 8-20% CHROMINUM, 2-5% BORON AND 6585% OF METAL FROM THE GROUP CONSISTING OF NICKEL AND COBALT; THEN HEATING SAID PARTS TO A TEMPERATURE OF AT LEAST 2000* F. FOR MELTING SAID BRAZING ALLOY TO BRAZE SAID PARTS TOGETHER; AND MAINTAINING SAID PARTS IN A DRY REDUCING ATMOSPHERE OF HYDROGEN DURING THE BRAZING OPERATION.

Claim 3

THE METHOD OF BRAZING A PAIR OF CORROSION AND OXIDATION RESISTANT HIGH TEMPERATURE ALLOY PARTS TOGETHER; SAID METHOD COMPRISING THE STEPS OF GRIT BLASTING THE SURFACES OF SIAD PARTS TO BE BRAZED TOGETHER WITH IRON GRIT IN THE SOLID STATE TO ROUGHEN SAID SURFACES AND TO PROVIDE A FILM OF SAID IRON GRIT OVER SAID SURFACES; DISPOSING SAID SURFACES IN ABUTTING RELATION; PLACING A MIXTURE CONTAINING A BRAZING ALLOY IN POWERED FORM ON SAID PARTS ALONG ONE OR MORE EDGES OF SAID ABUTTING SURFACES, SAID MIXTURE INCLUDING A BINDER FOR SAID BRAZING ALLOY AND SAID BRAZING ALLOY CONSISTING OF 65-75% NICKEL, 13-20% CHROMIUM, 2.75-4.75% BORON, 3-5% IRON, 0.05-0.5% CARBON, 3.5%-5.5% SILICON; HEATING SAID PARTS FROM A TEMPERATURE UNDER THE MELTING TEMPERATURE OF SUCH BRAZING ALLOY TO A TEMPERATURE OF AT LEAST 2000* F. IN A TIME OF NOT MORE THAN 10 MINUTED FOR QUICKLY MELTING SAID BRAZING ALLOY TO BRAZE SAID PARTS TOGETHER; AND MAINTAINING SAID PARTS IN A DRY REDUCING ATMOSPHERE OF HYDROGEN HAVING A DEW POINT OF NO MORE THAN -60* F. DURING THE BRAZING OPERATION.

Claim 4

THE METHOD OF BRAZING A PAIR OF CORROSION AND OXIDATION RESISTANT HIGH TEMPERATURE ALLOY PARTS TOGETHER; SAID METHOD COMPRISING THE STEPS OF GRIT BLASTING THE SURFACES OF SIAD PARTS TO BE BRAZED TOGETHER WITH IRON GRIT IN THE SOLID STATE TO ROUGHEN SAID SURFACES AND TO PROVIDE A FILM OF SAID IRON GRIT OVER SAID SURFACES; DISPOSING SAID SURFACES IN ABUTTING RELATION; PLACING A MIXTURE CONTAINING A BRAZING ALLOY IN POWERED FORM ON SAID PARTS ALONG ONE OR MORE EDGES OF SAID ABUTTING SURFACES, SAID MIXTURE INCLUDING A BINDER FOR SAID BRAZING ALLOY AND SAID BRAZING ALLOY CONSISTING OF 65-75% NICKEL, 13-20% CHROMIUM, 2.75-4.75% BORON, 3-5% IRON, 0.05-0.5% CARBON, 3.5%-5.5% SILICON; HEATING SAID PARTS FROM A TEMPERATURE UNDER THE MELTING TEMPERATURE OF SUCH BRAZING ALLOY TO A TEMPERATURE OF AT LEAST 2000* F. IN A TIME OF NOT MORE THAN 10 MINUTED FOR QUICKLY MELTING SAID BRAZING ALLOY TO BRAZE SAID PARTS TOGETHER; AND MAINTAINING SAID PARTS IN A DRY REDUCING ATMOSPHERE OF HYDROGEN HAVING A DEW POINT OF NO MORE THAN -60* F. DURING THE BRAZING OPERATION.