Abstract: A waste gate component for a turbo charger made of a ferritic steel including C, Cr, Ni, Nb, V, Mn, and optionally Si, and Ti as main alloying elements.

Abstract: The present disclosure relates to a novel iron-based austenitic alloy for a turbocharger housing and to methods of its preparation.

Abstract: The present invention relates to a waste gate component for a turbo charger comprising an alloy comprising about 30 to about 42 wt.-% Ni, about 15 to about 28 wt.-% Cr, about 1 to about 5 wt.-% Cr, about 1 to about 4 wt.-% Ti, and at least about 20 wt.-% Fe, and to processes for preparing such a waste gate component.

Abstract: Turbocharger components comprising a relatively light-weight nicked-based superalloy having an amount of ??-phase domains that is greater than 40% after aging the component at 1000° C. for 300 hours.

Abstract: A turbine arrangement for an exhaust gas turbocharger includes a turbine housing, a turbine wheel that is arranged in the turbine housing and has an axis of rotation, and a variable turbine geometry arrangement (VTG arrangement). The VTG arrangement includes a bearing ring, a disc, multiple vanes rotatably mounted in the bearing ring, and a contour sleeve that is coupled with the disc. The turbine housing comprises an axial stop, against which the contour sleeve stops in order to secure the VTG arrangement in an axial direction within the turbine housing.

Abstract: A turbine arrangement for an exhaust gas turbocharger includes a turbine housing, a turbine wheel that is arranged in the turbine housing and has an axis of rotation, and a variable turbine geometry arrangement (VTG arrangement). The VTG arrangement includes a bearing ring, a disc, multiple vanes rotatably mounted in the bearing ring, and a contour sleeve that is coupled with the disc. The turbine housing comprises an axial stop, against which the contour sleeve stops in order to secure the VTG arrangement in an axial direction within the turbine housing.

Abstract: The present disclosure relates to a novel iron-based austenitic alloy for a turbocharger housing and to methods of its preparation.

Abstract: A nickel- and chrome-rich highly heat-resistant, austenitic iron based alloy. The alloy exhibits an improved fine dendritic carbide structure and can withstand repeated thermal elongation and strain which is particularly important for an exhaust-gas turbocharger component exposed to exhaust gas flow, such as a turbine housing. The alloy also guarantees very good thermo-mechanical fatigue (TMF) loading performance. A thermal cracking problem of the component is significantly reduced. The alloy is influenced by the relationship between the elements nickel, niobium, cerium and vanadium. The invention further concerns a method for prevention of crack formation and for minimizing oxidization in a turbocharger turbine housing.

Abstract: Turbocharger components comprising a relatively light-weight nicked-based superalloy having an amount of ??-phase domains that is greater than 40% after aging the component at 1000° C. for 300 hours.

Abstract: An exhaust-gas turbocharger (1) having a compressor (2) which has a compressor housing (3); a turbine (4) which has a turbine housing (5); and a compressor-side and/or turbine-side charge pressure regulating device (6) which has a shut-off element (7) which opens or closes a flow opening (9). The shut-off element (7) is in the form of a slide which is mounted on a guide (8) so as to be longitudinally displaceable along a longitudinal central line (LM8) of the guide (8), and the flow opening (9) is arranged at least substantially at a right angle (?) with respect to the longitudinal central line (LM8) of the guide (8).

Abstract: A waste gate component for a turbo charger made of a ferritic steel including C, Cr, Ni, Nb, V, Mn, and optionally Si, and Ti as main alloying elements.

Abstract: An exhaust-gas turbocharger (1), with a turbine housing (2) which has a turbine housing inlet (8) and a turbine housing outlet (9) for exhaust gas, and which has a wastegate duct (45) between the turbine housing inlet (8) and the turbine housing outlet (9), and a flap arrangement (33) comprising a pivotable flap lever (35), a flap plate (34), which is connected to the flap lever (35), for opening and closing the wastegate duct, and having a spring element (37) which is arranged between the flap lever (35) and a disc (36) fastened to the flap plate (34). The spring element (17) has an outer circumferential region (23) which is supported on a sliding contact surface (42), which is of curved form, of the disc (36).

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.

Abstract: The present invention relates to a waste gate component for a turbo charger comprising an alloy comprising about 30 to about 42 wt.-% Ni, about 15 to about 28 wt.-% Cr, about 1 to about 5 wt.-% Cr, about 1 to about 4 wt.-% Ti, and at least about 20 wt.-% Fe, and to processes for preparing such a waste gate component.

Abstract: A process for producing a turbine rotor (1), which has, as joining partners, a turbine wheel (2) made of TiAl and a shaft (3) produced from steel, with the following process steps: providing the turbine wheel (2); providing a solder; providing the shaft (3); and connecting the turbine wheel (2) and the shaft (3) by electron beam soldering by means of an electron beam (5).

Abstract: A turbine wheel (1) of an exhaust-gas turbocharger (2), formed from a titanium aluminide material, having a wheel back (7) which is of closed configuration as viewed from an axial direction (A) and which has an outer contour (17), a hub (3) which extends from the wheel back (7) and which tapers along the axial direction (A), and a multiplicity of turbine blades (4) which extend from the wheel back (7) and from the hub (3) 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 (5). The wheel back (7) has, in an outer region (11) adjoining the connection region (5), a wheel back outer diameter (DRR) which is greater than or equal to the connection region outer diameter (DAB).

Abstract: An exhaust-gas turbocharger (1), with a turbine housing (2) which has a turbine housing inlet (8) and a turbine housing outlet (9) for exhaust gas, and which has a wastegate duct (45) between the turbine housing inlet (8) and the turbine housing outlet (9), and a flap arrangement (33) comprising a pivotable flap lever (35), a flap plate (34), which is connected to the flap lever (35), for opening and closing the wastegate duct, and having a spring element (37) which is arranged between the flap lever (35) and a disc (36) fastened to the flap plate (34). The spring element (17) has an outer circumferential region (23) which is supported on a sliding contact surface (42), which is of curved form, of the disc (36).

Abstract: An exhaust-gas turbocharger (1), with: a turbine housing (2) which has a turbine housing inlet (8) and a turbine housing outlet (9) for exhaust gas, and which has a wastegate duct between the turbine housing inlet (8) and the turbine housing outlet (9), and a flap arrangement (10) comprising a pivotable flap lever (12), a flap plate (11), which is connected to the flap lever (12), for opening and closing the wastegate duct, and having a spring element (17) which is arranged between the flap lever (12) and a disc (18) fastened to the flap plate (11). The spring element (17) has an outer circumferential region (23) which is supported on a sliding contact surface (20), which is of curved form, of the flap lever (12).

Abstract: A turbocharger compressor wheel with an aluminum proportion of at least 50 atom percent, produced by. etching a turbine wheel base body using an alkaline etchant to produce a specific etch pitting consisting of nano pores and micropores and chemical deposition of a nickel-phosphorous protective layer (19) onto the etched base body surface.

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.