Verfahren zum Abtrennen von Einschlüssen in Metallen durch Umschmelzen.

摘要

In the process of remelting of metallic materials and more particularly of nickel-based superalloys, the melting operation is carried out by placing the alloys in a sectorised crucible made of copper which is cooled or a cold crucible and by means of electromagnetic inductors. A magnetic field applied to the molten metal mass has a frequency between 50 Hz and 5 x 10<6> Hz and preferably between 5 x 10<3> Hz and 5 x 10<5> Hz, so as to ensure both an electromagnetic stirring of the liquid metal and a surface concentration along the cold walls of the mass to be remelted of all the non-conductive particles consisting especially of ceramic inclusions so as to obtain an inclusion separation by settling.