Nickel-base superalloy

   
   

The invention relates to a nickel-base superalloy. The alloy according to the invention is characterized by the following chemical composition (details in % by weight): 7.7-8.3 Cr, 5.0-5.25 Co, 2.0-2.1 Mo, 7.8-8.3 W, 5.8-6.1 Ta, 4.9-5.1 Al, 1.3-1.4 Ti, 0.11-0.15 Si, 0.11-0.15 Hf, 200-750, preferably 200-300 ppm of C, 50-400, preferably 50-100 ppm of B, remainder Ni and production-related impurities. It is distinguished by very good castability and a high resistance to oxidation.

L'invenzione riguarda una nichel-base superalloy. La lega secondo l'invenzione è caratterizzata dalla seguente composizione chimica (particolari in % di peso): 7.7-8.3 Cr, 5.0-5.25 Co, 2.0-2.1 Mo, 7.8-8.3 W, le 5.8-6.1 AT, 4.9-5.1 Al, 1.3-1.4 Ti, 0.11-0.15 siliconi, 0.11-0.15 HF, 200-750, preferibilmente 200-300 PPM della C, 50-400, preferibilmente 50-100 PPM della B, Ni di resto ed impurità produzione-relative. È distinto dal castability molto buon e da un'alta resistenza ad ossidazione.

 
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