METHOD OF MANUFACTURING PART FROM WORKPIECE MADE FROM NICKEL-CHROMIUM-ALUMINIUM ALLOY Russian patent published in 2025 - IPC C22F1/10 C22C19/05 B23K35/30 

FIELD: metallurgy.

SUBSTANCE: invention relates to metallurgy, particularly, to production of parts with weld seams. Method of manufacturing a part with welded seams includes providing workpiece or part thereof from nickel-chromium-aluminium alloy, assembly and welding using welding filler material with production of part made partially or completely from nickel-chromium-aluminium alloy workpiece or part thereof and having welded seams, homogenizing annealing of welds and thermal influence zones at temperature of 980-1250 °C for time from 0.05 min to 24 h, followed by cooling in a fixed protective gas or air, in a moving shielding gas or air, or in water. Workpiece or its part are made partially or completely from nickel-chrome-aluminium alloy containing the following, wt.%: more than 18-33 chromium, 1.8-4.0 aluminium, 0.01-7.0 iron, 0.001-0.50 silicon, 0.001-2.0 manganese, 0.00-0.60 titanium, each 0.0-0.05 magnesium and/or calcium, 0.005-0.12 carbon, 0.0005-0.050 nitrogen, 0.0001-0.020 oxygen, 0.001-0.030 phosphorus, max. 0.010 sulphur, max. 2.0 molybdenum, max. 2.0 tungsten, nickel in an amount greater than or equal to 50 and common process impurities, wherein said part comprises welded seams of welding filler of composition identical to that of workpiece alloy. In nickel-chromium-aluminium alloy the following ratios shall be observed: Fp ≤ 39.9, where Fp = Cr + 0.272*Fe + 2.36*Al + 2.22*Si + 2.48*Ti + 0.374*Mo + 0.538*W – 11.8*C.

EFFECT: high-temperature corrosion resistance, high creep resistance and manufacturability.

7 cl, 5 dwg, 5 tbl