REPEATED SINTERING OF TUNSTEN BASED HEAVY ALLOYS FOR IMPROVED IMPACT TOUGHNESS

摘要

The method comprises maintaining the tungsten based alloy at 950-1350 deg.C for 1 min. to 24 hrs., quenching in water or oil and repeating the cycle of heating and quenching steps. The heating step is carried out in an inert atmosphere, and the cycle of heating and quenching is repeated 2-60 times. The alloy is composed of (in wt.) 86-99% W, 0.5-9 wt.% Ni and 0.5-5 % Fe. The alloys are used for rotors for aircraft, radioactive shield materials and core materials for kinetic energy penetrators in military applications.