MANUFACTURING DEVELOPMENT OF TUNGSTEN ALLOYS FOR ROCKET NOZZLES. MID-YEAR REPORT ON PHASE II.
Rept. for 1 Jan-31 Jul 60,
WESTINGHOUSE ELECTRIC CORP BLAIRSVILLE PA
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The vacuum arc skull casting of tungsten-molybdenum alloy rocket nozzles in thin configurations can be achieved. It is anticipated that modifications of the same techniques can be adapted to the casting of pure tungsten. The reclamation of the tungsten scrap generated in this development contract has been achieved with very promising results. The reclamation of the 50 tungsten - 50 molybdenum weight per cent solid solution alloy scrap has not, however, met with success. A definite relationship between the purity of the vacuum arc melting electrodes and the ability to vacuum arc melt and cast successfully has been established. The temperature of the tungsten arc has been calculated theoretically and confirmed in experimental melting to be in the order of 10,000 to 11,000F. In addition, the partition of power or the amount of power which is received by the cathode and the anode has been shown to be approximately seventeen times greater at the anode or bath than that received by the cathode or consumable electrode using D.C. straight polarity.