Patent ID: 6368376
Filing Date: 2002-04-09
Classification: B22F,C22C,F42B

Abstract:
A process for making an oxide dispersion-strengthened tungsten heavy alloy by mechanical alloying for an armor plate destroying warhead having self-sharpening susceptibility during high strain rate deformation, comprising the steps of:adding 0.1 to 5 wt. % of Y2O3 powders to mixed powders comprising more than 90 wt. % of tungsten powders, and nickel and iron powders for the rest; subjecting the resulting mixture to a mechanical alloying to prepare oxide dispersion-strengthened tungsten heavy alloy powders having a tungsten grain size of less than 100 nm and a lamella distance less than 0.5 &mgr;m; compacting the tungsten heavy alloy powders into compressed powders using a press; and sintering the compressed powders at a temperature in the range of 1400 to 1600Â° C.