Spark Sintering of Powdered Metal.
NAVAL ORDNANCE STATION LOUISVILLE KY
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The study was conducted to determine the feasibility of using the spark sintering of powdered metals process for the manufacture of missile and ordnance components. For economical reasons, this investigation was limited to 2 12 inch diameter spark sintered cylindrical billets that were 2 12 inches, 5 inches, and 7 12 inches tall. Billets with theoretical densities of 94 to 99 were obtained from 6AL-4V Titanium, Inconel 718, 410 Stainless Steel, and 4340 alloy steel powders. Test specimens for determining the mechanical properties of each of the subject metals were machined and tested. It was determined that spark sintering simple cylindrical shapes of any of the metals investigated would not be economically feasible at this time. It is the general conclusion that the spark sintering process is economically feasible in special application, where extensive machining labor andor costly tooling can be eliminated by spark sintering billets close to their final shape.
- Fabrication Metallurgy