Joining Inconel® & Co. with process reliability: Vacuum-brazing, EB welding & Heat treatment for high-temperature components in the aerospace, energy & process industries.
Nickel-based alloys (e.g. Inconel®, Hastelloy®) remain dimensionally stable and corrosion-resistant even at high temperatures and in aggressive media. Listemann combines Vacuum-brazing, EB welding and Heat treatment to realize high-strength, tight joins and defined microstructures for turbomachinery, hot gas and process environments.
Vacuum-brazingcomplex cooling channel and heat exchanger structures, repeatable and flux-free
EB welding: deep penetrating, narrow seams for temperature-stressed components
Heat treatment: Stress relief annealing, precipitation and solution treatments according to material system
Hybrid joining: Nickel-based alloys with steel/titanium/ceramics (depending on system)
Qualification: Tightness/helium leak test, tensile/shear tests, metallography, CT
Turbine & hot gas components, combustion chambers, guide and rotor blades
High-temperature heat exchangers and flue gas/process technology
Chemical process industry: corrosion-resistant equipment and sealing components
Typically ~0.02-0.08 mm (depending on geometry and solder). Uniform gaps, stable fixing and clearly defined solder feed points are crucial for tightness and strength.
Project-dependent Ni-based solders (e.g. BNi systems) or precious metal solders; selection according to application temperature, corrosion medium, gap and desired toughness.
Often Cu, Ni, Nb, Ta or Mo – depending on the medium, temperature and required ductility; interlayers act as diffusion and stress barriers.
Precipitation/embrittlement and diffusion processes are possible; therefore design solders and cycles for continuous and peak temperatures and plan thermal cycle tests if necessary.
Low-stress design (radii instead of notches), controlled heating/cooling ramps, stress-relief annealing if necessary and interlayers to adjust stiffness/CTE.
Bare metal, oxide-free surfaces (grinding/fine blasting, chemical cleaning), defined roughness and low-particle handling; prepare immediately before joining.
Large joining surfaces, load paths parallel to the joining zone, radii instead of notches, minimum peel load, defined tolerances and service accessibility for inspection.
Suitable filler materials, low heat input, adapted seam geometry, controlled cooling and clean surfaces; preheating/post-treatment if necessary.
Phone: +41 52 245 18 55
Mobile: +41 77 442 46 91
t.bachmann@listemann.com
Phone: +423 375 90 12
Mobile: +423 78 05 401
t.bitschnau@listemann.com
Our new check helps you to get a professional assessment of possible projects within our procedures about the feasibility in the shortest time. We inform you whether and how a realization becomes possible.
With our know-how you open up the problem-free entry into new technologies. Our materials expertise helps you to bring products with innovative material properties to market and thus strengthen your competitive position.
