Method of controlled alloying of intermetallic γ-TiAl alloys with carbon

From a theoretical point of view, the present invention is based on a thermochemical reaction that takes place between the γ-TiAl melt and the graphite crucible during induction melting. From a practical point of view, the present invention is based on the development of a technological process for the induction melting of γ-TiAl alloys and the definition of the parameters of this process, which influence the thermochemical reaction between the melt and the graphite crucible.

Competitive advantage

• lower production price of the product due to the use of graphite crucibles, which have an order of magnitude lower purchase price than Y₂O₃ crucibles;
• lower purchase price of the melting furnace compared with induction skull melting;
• higher superheating temperature of the melt enabling better fluidity when casting complex thin-walled castings;
• low oxygen contamination during melting compared with ceramic crucibles;
• controllable and reproducible alloying with carbon during melting and casting.

Use of technology

• in the production of precise castings, e.g. turbocharger wheels for combustion engines, turbine blades or exhaust valves for combustion engines.

Protection of intellectual property

• Patent application: (CZ)
• Granted patent: (SK)