Disclosed is a novel heat-resistant superalloy for turbine disks having a chemical composition consisting of, in mass%, 19.5-55% of cobalt, 2-25% of chromium, 0.2-7% of aluminum, 3-15% of titanium and the balance of nickel and inevitable impurities.

Heat-resistant superalloy

There are a multiplicity of methods of making through-holes. In particular in the production of a multiplicity of film-cooling holes, as in gas turbine blades or combustion chamber elements, small time advantages are also important when making a hole. The method according to the invention, to make the hole close to the final contour in each case in sections in a top and a bottom region in order to then produce the final contour with other laser parameters, achieves time advantages.

Method For Producing a Hole

A welding method for welding workpieces made of highly heat-resistant superalloys is provided. The method includes generating a heat input zone on the workpiece surface by means of a heat source, feeding welding filler material into the heat input zone by means of a feeding device, and generating a relative motion between the heat source and the feeding device on one hand and the workpiece surface on the other hand by means of a conveying device. Furthermore, according to the welding method, the mass feed rate is ≦350 mg/min.

Method for welding workpieces made of highly heat-resistant superalloys, including a particular mass feed rate of the welding filler material

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): 77-83 Cr, 50-525 Co, 20-21 Mo, 78-83 W, 58-61 Ta, 49-51 Al, 13-14 Ti, 011-015 Si, 011-015 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

Nickel-base superalloy

Known protective layers having a high Cr content, as well as silicon, have brittle phases that become additionally brittle under the influence of carbon during use. The protective layer according to the invention has the composition of 31% to 35% cobalt (Co), 10% to 13% aluminum (Al), 0.1% to 0.7% yttrium (Y), and/or at least one equivalent metal from the group comprising scandium and the rare earth elements, 31% to 35% chromium (Cr), 0.1% to 0.5% silicon, and the remainder nickel.

Alloy, protective layer and component

Component made from a nickel-based super alloy contains (in wt.%) 9-11 chromium (Cr),3-5 tungsten (W), 0.5-2.5 molybdenum (Mo), 3-3.5 aluminium (Al), 3-5 titanium (Ti), 3-7 tantalum (Ta), 0-12 cobalt (Co), 0-1 niobium (Nb), 0-2 hafnium (Hf), 0-1 zirconium (Zr), 0-0.05 boron (B), 0-0.2 carbon (C), 1-5 rhenium (Re), 0.1-5 ruthenium (Ru), balance nickel (Ni) and impurities. Preferably the alloy contains at least 2 wt.% Re and a maximum of 3 wt.% Ru. The component is a monocrystalline structure having an isotropic distribution of the orientation of the grain structure.

High temperature resistant part, made of single-crystal or polycrystalline nickel-base superalloy

The invention a high temperature resistant component made of an alloy, in particular a nickel-based-super alloy in the following composition and expressed in weight percentage: 9-13% Cr, 3-5% W, 0.5-2.5% Mo, 3-5% Ti, 3-7% Ta, 1-5% Re, up to 2000 ppm of a solidification promoter, the remainder being nickel.

High temperature resistant component

PROBLEM TO BE SOLVED: To provide a structural member, made of an Ni superalloy which particularly has heat resistance and corrosion resistance, exhibits long-time stability to the formation of an intermetallic phase deteriorating its ductility and has required characteristics. SOLUTION: The structural member, made of an Ni superalloy having a composition comprising, by weight, 9 to 11% Cr, 3 to 5% W, 0.5 to 2.5% Mo, 3 to 5% Al, 3 to 5% Ti, 3 to 7% Ta, and 1 to 5% Re, and the balance Ni is formed. Alternatively, the structural member is made of a superalloy having a composition comprising 0.1 to 5% Ru instead of Re in the above composition. COPYRIGHT: (C)2003,JPO

Alfred Dr. Scholz

Papers

High temperature resistant part, made of single-crystal or polycrystalline nickel-base superalloy

High temperature resistant component

High temperature resistant structural member