Borgwarner Inc.

Michael Loewenberg

Gerald Schall

Frank Scherrer

Stefan Eisinger

Adnan Adilovic

Menno Roder

Juergen Strelbitski

Dominik Kuss

Achim Klein

Igor Koenig

Daniela Cempirkova

Steffen Bereswill

A TiAl alloy comprising the elements C, Si, B, Al and Ti, wherein a C fraction is &#x2264;0.5 wt %, an Si fraction is 0.05-2.5 wt %, a B fraction is &#x2264;0.4 wt % and an Al fraction is 25-43 wt %, in each case in relation to the total weight of the alloy.

TiAl alloy, in particular for turbocharger applications, turbocharger component, turbocharger and method for producing the TiAl  alloy

A process for producing a turbine rotor (), which has, as joining partners, a turbine wheel () made of TiAl and a shaft () produced from steel, with the following process steps: providing the turbine wheel (); providing a solder; providing the shaft (); and connecting the turbine wheel () and the shaft () by electron beam soldering by means of an electron beam ().

Process for producing a turbine rotor

A flow rotor (), in particular a turbine wheel, having a wheel core () and an outer part () which surrounds the wheel core () and is connected thereto. The wheel core () and the outer part () are constructed from different materials.

Flow rotor, in particular turbine wheel

A turbine wheel () of an exhaust-gas turbocharger (), formed from a titanium aluminide material, having a wheel back () which is of closed configuration as viewed from an axial direction (A) and which has an outer contour (), a hub () which extends from the wheel back () and which tapers along the axial direction (A), and a multiplicity of turbine blades () which extend from the wheel back () and from the hub () and which blades extend outward in a radial direction (R), as far as a connection region outer diameter (DAB) at least in a connection region (). The wheel back () has, in an outer region () adjoining the connection region (), a wheel back outer diameter (DRR) which is greater than or equal to the connection region outer diameter (DAB).

Turbine wheel of an exhaust-gas turbocharger

An exhaust-gas turbocharger (), having a shaft () which has an outer diameter (A); a turbine wheel () which is fastened to the shaft (); and a connecting device () via which the shaft () is fastened to the turbine wheel (). The shaft () has, in the region of an end side (), a shaft shoulder () with an outer diameter (A) larger than the outer diameter (A) of the shaft (). The turbine wheel () has an external thread portion () integrally formed on its wheel rear side () The connecting device () has a sleeve nut (A) which is screwed onto the external thread portion () and, in a process, engages behind the shaft shoulder () in order to brace the shaft () against the turbine wheel ().

Growing community of inventors

Weierhof/Bolanden, Germany

Michael Loewenberg