WELDING AND BRAZING OF HIGH-TEMPERATURE RADIATORS AND HEAT EXCHANGERS

Technical Report · Tue Feb 20 00:00:00 EST 1962

DOI:https://doi.org/10.2172/4783491· OSTI ID:4783491

Slaughter, G M; Patriarca, P

Procedures were developed for fabricating highperformance radiators and heat exchangers for the Aircraft Nuclear Propulsion (ANP) Program. These components, which contain multitudes of tube-to-tube sheet and tube-to-fin joints, are similar in design to those under consideration for a variety of space vehicle applications. In order to ensure reliability of the tube-to-tube sheet joints, techniques producing welds of extremely high quality were used and back brazing of the welds with a suitable alloy was incorporated. High-temperature brazing was also incorporated to attach high-conductivity fins to Inconel tubes in the radiators. The selection of a suitable brazing alloy for these applications was dependent upon several factors, including corrosion and oxidation resistance, flow point, and mechanical properties. A Ni- Si-B alloy was found to be adequate from all these considerations. Special brazing procedures were developed to obtain satisfactory flowability of this brazing alloy on tube-to-fin joints. The suitability of these fabrication procedures for the very stringent service conditions to which the radiators and heat exchangers were subjected was demonstrated by testing full-size components under operating conditions. (auth)

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
• DOE Contract Number: W-7405-ENG-26
• NSA Number: NSA-16-015161
• OSTI ID: 4783491
• Report Number(s): ORNL-TM-147
• Resource Relation: Other Information: Orig. Receipt Date: 31-DEC-62
• Country of Publication: United States
• Language: English

Related Subjects

METALS, CERAMICS, AND OTHER MATERIALS
AIRCRAFT
ALUMINUM ALLOYS
BORIDES
BRAZING
CHROMIUM ALLOYS
CORROSION
FINS
HEAT EXCHANGERS
HIGH TEMPERATURE
INCONEL ALLOYS
MECHANICAL PROPERTIES
MELTING POINTS
NICKEL ALLOYS
NIOBIUM ALLOYS
OXIDATION
PERFORMANCE
PROPULSION
REACTORS
SHEETS
SILICIDES
SPACE VEHICLES
TESTING
TITANIUM ALLOYS
TUBES
WELDING
WELDS