| 摘要 |
FIELD: metallurgy. ^ SUBSTANCE: invention refers to metallurgy and can be employed, in particular, for fabricating working blades of gas-turbine engines and other units and parts operating within temperature range up to 1000°C. Casts out of alloy contain wt % : chromium 3.0-7.0, cobalt 4.0-8.5, tungsten 11.5-15.0, carbon 0.1-0.2, aluminium 4.8-5.8, niobium 0.4-1.0, titanium 2.0-3.0, molybdenum 0.5-1.0, boron <=0.025, lanthanum <=0.02, yttrium <=0.02, cerium <=0.02, nickel - the rest; further casts are subject to thermo treatment or thermo treatment after gas-static pressing. Thermo treatment is carried out in a mode of heating to the temperature of complete dissolving gamma'-phase ±25°C, then holding and cooling. ^ EFFECT: upgraded endurance limit and strength properties of items. ^ 9 cl, 2 tbl, 1 dwg, 1 ex |
