ISOTHERMAL FORGING DIE MADE OF NI-BASE ALLOY EXCELLENT IN HIGH TEMPERATURE STRENGTH AND HIGH TEMPERATURE OXIDATION RESISTANCE

摘要

PURPOSE:To obtain an Ni-base die for isothermal forging excellent in strength and oxidation resistance at a high temp. by adding specified alloy elements to Ni. CONSTITUTION:An Ni-base alloy contg., by weight, 13 to 15% W, 9 to 11% Co, 8 to 10% Cr, 4.75 to 5.75% Al, 0.01 to 0.02% B, 1.5 to 2.5% Ti, 0.1 to 0.6% Nb, 1.5 to 2.5% Hf, 0.1 to 1.0% Mo and 0.1 to 1.0% Ta with 0.2% C as impurities is used as stock to manufacture a die for isothermal forging. The isothermal forging die excellent in strength and oxidation resistance even at a high temp. of 800to1200 deg.C can be obtd.