Method of manufacturing titanium-aluminum base alloys
AssigneeBohler Edelstahl GmbH
InventorsHeimo Jager, Herbert Puschnik
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Abstract
The invention is directed to a Titanium-aluminum base alloy articles are produced from pieces of starting materials by melting thereof in a metallic melting crucible having a rotating electrode or a plasma- or electron beam device and there is then accomplished arc remelting, preferably vacuum-arc remelting following the melting of the pieces of starting materials. Furthermore, the arrangement for the manufacture of the articles formed of titanium-aluminum base alloys comprises a melting apparatus containing a rotating electrode or a plasma- or electron beam device and a vacuum-arc melting apparatus.
Claims18
A method for manufacturing articles formed of metallic alloys, said metallic alloys being composed of titanium-aluminum base alloys, wherein melted starting materials are teemed into a mold to form a casting and the casting is re-melted, comprising the steps of:
- holding in readiness starting materials in the form of pieces which substantially proportionally correspond to an alloy composition of the metallic alloy;
- melting the pieces of the starting materials in a melting crucible to form a melt;
- adding at least one alloy component to the melt in the melting crucible in order to set a desired alloy composition containing a maximum of 40 to 60 atomic-% titanium;
- casting the melt from the melting crucible into a mold to form an ingot for the use as an electrode;
- remelting the ingot as a self-consumable electrode of a vacuum arc-melting furnace into a compact remelted ingot;
- hot forming the compact ingot obtained from the arc-melting furnace;
- and
- adjusting the oxygen content of the metallic alloy obtained by the melting and remelting steps to an amount which is less than 600 ppm.
The method according to claim 11, wherein:
- the step of surface cleaning the starting materials entails sandblasting the starting materials.
The method according to claim 11, wherein:
- the step of surface cleaning the starting materials entails pickling the starting materials.
Dependencies are inferred from the claim text.