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Improved Production of Powder Metallurgy Items

Report Number: ASD TDR 7-911 Volume 2
Author: K. Farrell and N. M. Parikh
Corporate Author: Armour Research Foundation
Corporate Report Number: ARF-B247-6
Date of Publication: 1963-01
Pages: 16
Contract: AF 33(657)9140
AD Number: AD0294619
Original AD Number: AD-294 619

The early stages of an investigation of the production of superalloy items by powder metallurgy techniques are discussed. Three superalloy powders (Inco 713C, Udimet 700, PH15-7Mo) were made by inert gas atomization of the liquid alloys. The atomizing conditions used and the properties of the powders so produced are presented. The powders are fine, have good flow characteristics and can be made with low interstitial impurities. These powders may be compacted and sintered by ordinary methods. The technique employed in the synthesis of molybdenum-base superalloy is outlined. Some difficulty may be encountered with the PH 15-7Mo alloy, but it is possible that long time, low sintering temperature treatments may minimize this problem. The phenomenon noted in the sintering tests on this alloy may be related to the evolution of a volatile phase from the alloy, or may be connected in some way with the high gas content of the metal.

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