초록

A material consisting essentially of tungsten having from 5 to about 20 grains per square millimeter and a hardness on the Rockwell C scale from about 31 to about 35 is suited for armor penetration.

대표청구항 ▼

A penetrator for armor consisting essentially of a body of tungsten having from about 5 to about 20 grains per square millimeter and a hardness of from about 31 to about 35 on the Rockwell C hardness scale. A process for producing a frangible tungsten product comprising (a) pressing tungsten powder

A penetrator for armor consisting essentially of a body of tungsten having from about 5 to about 20 grains per square millimeter and a hardness of from about 31 to about 35 on the Rockwell C hardness scale. A process for producing a frangible tungsten product comprising (a) pressing tungsten powder having an average grain size of from about 1 to about 25 microns to form a bar of a predetermined cross-sectional area, (b) sintering said bar in a non oxidizing atmosphere at a temperature of from about 2700°C. to about 2900°C. for a sufficient time to attain a density in said bar of from about 17.3 g/cm3 to about 18.1 g/cm3, (c) elongating said bar to achieve about 30% to about 40% reduction in cross-sectional area, (d) machining the resulting bar to form penetrators of predetermined shape, and (e) annealing at least a portion of said penetrator at a temperature of from about 1700°C. to about 1900°C. for a sufficient time to achieve a material having from about 5 to about 20 grains per square millimeter, and a hardness measuring from about 31 to about 35 on the Rockwell C hardness scale.