Tungsten Powder Granularity Effect on Armor Capability of Tungsten Copper Liner

In recent years, tungsten copper is one of the most outstanding materials for the liner. Liner is the key part of shaped charge, which quality directly determines the penetration and armor capability of warhead blast. Compared with conventional liner, the powder liner has many advantages, such as high density, excellent thermal conductivity, good elongation, flexible composition ratio, better moldability and so on. Penetrating analysis based on fluid dynamics theory, it can be avoided to a large extent from the phenomenon of blocking pestle to form a longer and stable jet. Tungsten powder shape, size and size distribution can have a significant impact on the powder compaction and sintering process and the final product performance, thus affecting the performance liner shaped and penetration depth.

The experiment uses mixed - pressing sintering process, and put the compacting liner blank into high-temperature tube furnace, after 70min gradually warmed to 750℃ and holding 20min. Then use instantaneous electric detonator at the top of the midpoint detonating the static penetration power experiment. From the uniformity of powder liners isometric high radial position analyses, its runout and wall thickness substantially unchanged. The density distribution is analyzed in the axial direction, typically the maximum density at the top of the bottom of the minimum density, a decreasing trend was up and down. Detecting the use of Archimedes powder liners green density can be found in between 45-62μm tungsten powder particle granularity, with the decrease of tungsten powder particle size, density and relative density of the compact tungsten-copper powder liner and sintered density showed a trend of increasing. While maintaining the same quality with sub-fractions, process, particle size and other conditions of 60 ° tungsten powder copper shaped the static penetration test can be found with the decrease of the particle size of tungsten powder, powder liner break a depth showed an increasing trend and a significant improvement in the performance of armor.