PROCESS FOR HARDENING SPONGE REFRACTORY METALS AND PRESSING TO FORM A SHAPE

摘要

A process for hardening sponge refractory metal and making it more susceptible to crushing by the addition of oxygen and/or nitrogen gas to either the reduction stage of the production of the metal from a tetrachloride thereof with magnesium, or to the treatment of a regulus of such metal following vacuum distillation thereof.