The Characteristic of Osprey Preform

Abstract

The Osprey Process introduced here is a kind of spray deposition, available for manufacturing bulk preform of high density and high strength by one process straight from molten metals. The characteristics of this osprey preform are as follows; (1) Osprey preform density as deposit is higher than 99.4% for high speed steel (Disc preform) and higher than 99.3% for high carbon high speed steel (Tube preform). (2) The transverse rupture strength of Osprey preform after forged is superior to that of wrought alloy. (3) The transverse rupture strength of Osprey preform after HIP treatment is 2 times as high as that of conventional cast. (4) The density and strength of Osprey preform which were adequately deposited, worked and heat treated are expected to be improved further. © 1991, Japan Society of Powder and Powder Metallurgy. All rights reserved.