FIELD: metallurgy.
SUBSTANCE: unalloyed iridium ingot is subjected to hot forging, electron-beam melting iridium with content of the main component making at least 99.95 wt % being used to this end. Forging is carried out for about 0.5 h. Note here that temperature is decreased from 2000°C to 1300°C. Then, forged piece is annealed in vacuum of 10-4÷10-5 mm Hg. Forged piece is heated at the rate of 150°C/h the room temperature to 1100÷1200°C and held thereat for at least 1 h.
EFFECT: lower level of oxygen, hence higher quality of finished articles.
1 tbl, 1 ex
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