| abstract |
The nickel chromium triangle ferrotitanium aluminium forging alloy of hardening, the alloy has simultaneously good creep resistant, good high temperature corrosion and the good machinability of fabulous wearability, with (being represented with quality %)>18 to 31% chromium, 1.0 to 3.0% titanium, 0.6 to 2.0% aluminium,>3.0 to 40% iron, 0.005 to 0.10% carbon, 0.0005 to 0.050% nitrogen, 0.0005 to 0.030% phosphorus, most 0.010% sulphur, most 0.020% oxygen, most 0.70% silicon, most 2.0% manganese, most 0.05% magnesium, most 0.05% potassium, most 2.0% molybdenum, most 2.0% tungsten, most 0.5% niobium, most 0.5% copper, most 0.5% vanadium, optional 0 to 15% Co, optional 0 to 0.20% Zr, optional 0.0001 to 0.008% boron, the usual impurities caused remaining as nickel and by method, wherein nickel content is more than 35%, relation Cr+Fe+Co ＞ 25% (1) must wherein are fulfilled for realize good wearability, and relation fh ＞ 0 (2a) wherein fh=6.49+3.88Ti+1.36Al 0.301Fe+ (0.759 0.0209Co) Co 0.428Cr 28.2C (2) must are fulfilled for obtain intensity enough under high temperature, wherein Ti, Al, Fe, Co, Cr and C is that coherent element is represented with the quality % concentration represented and fh with %. |