B - Operations – Transporting – 22 – F
Patent
B - Operations, Transporting
22
F
75/165
B22F 3/16 (2006.01) B22F 1/00 (2006.01)
Patent
CA 1233678
ABSTRACT OF THE DISCLOSURE WROUGHT P/M PROCESSING FOR MASTER ALLOY POWDER A powder metallurgical process for producing a wrought product characterized by a low level of residual impurities. The process comprises the steps of: comminuting metal pow- der to effect a reduction in particle size, at least 60% of the comminuted particles being capable of passing through a -270 mesh Tyler screen; blending the metal powder with a softer metal-bearing powder; heating the blended powder particles at an elevated temperature, the particles adhering and forming a mass during heating; crushing the mass of powder particles; cold-isostatically pressing the crushed mass of powder; sintering the powder in the absence of an encapsulating member under conditions which effect a reduction in the nitrogen, oxygen and carbon levels of the powder; and hot working the sintered powder into a wrought product. The wrought product has less than 0.015% carbon.
464678
Hickl Anthony J.
Kumar Prabhat
Rivers Ronald D.
Haynes International Incorporated
Marcoux & Sher Swabey Mitchell Houle
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