TiAl alloy, in particular for turbocharger applications, turbocharger component, turbocharger and method for producing the TiAl alloy
AssigneeBorgWarner Inc.
InventorsGerald Schall, Daniela Cempirkova, Steffen Bereswill, Frank Scherrer, Menno Roder, Juergen Strelbitski, Michael Loewenberg, Adnan Adilovic, Dominik Kuss, Stefan Eisinger, Achim Klein
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Abstract
A TiAl alloy comprising the elements C, Si, B, Al and Ti, wherein a C fraction is ≤0.5 wt %, an Si fraction is 0.05-2.5 wt %, a B fraction is ≤0.4 wt % and an Al fraction is 25-43 wt %, in each case in relation to the total weight of the alloy.
Claims18
A TiAl alloy comprising the elements C, Si, B, Al and Ti, wherein a C fraction is ≤0.5 wt %, an Si fraction is 0.05-2.5 wt %, a B fraction is ≤0.4 wt % and an Al fraction is 25-43 wt %, in each case in relation to the total weight of the alloy, and wherein the TiAl alloy has an average grain size of 1 to 3 μm.
A turbocharger comprising at least one component, which is composed of a TiAl alloy comprising the elements C, Si, B, Al and Ti, wherein a C fraction is ≤0.5 wt %, an Si fraction is 0.05-2.5 wt %, a B fraction is ≤0.4 wt % and an Al fraction is 25-43 wt %, in each case in relation to the total weight of the alloy, and wherein the TiAl alloy has an average grain size of greater than 2 μm and/or a lamellar structure, wherein a spacing between the lamellae is ≤1.5 μm.
Dependencies are inferred from the claim text.