Procedure for preparing refractory alloys ductiles based on tungsten. (Machine-translation by Google Translate, not legally binding)

摘要

Process for preparing ductile refractory alloys based on tungsten, characterized in that it comprises homogeneously mixing in the form of powder from 0.03% to 0.4% and preferably from 0.1% to 0.15% by weight of thorium, from 0.003% to 0.03% and preferably from 0.004 to 0.019% by weight of carbon and up to 7%, and better still, from 1% to 7% by weight of rhenium, the rest, up to 100%, tungsten; subjecting this mixture to a pressure of the order of 3,500 Kgs/cm2 to form pearls, vitrifying them at a temperature of the order of 2350º C, for about 4 hours, to ensure the diffusion of the various constituents and form a solid solution of thorium and of rhenium in the tungsten, distributing the carbon between tungsten carbide and a solid solution of carbon in the tungsten; the pearls are then forged at a temperature of about 1850º C, to reduce their thickness between 13 and 7.5 mm; it is then rolled at a temperature of the order of 1.1550º C in sheets having a thickness of approximately 1 mm; During this manufacturing process the carbon precipitates in the form of finely dispersed thorium carbide. (Machine-translation by Google Translate, not legally binding)