TURBOCHARGER SHAFT AND WHEEL ASSEMBLY

摘要

A unit for a turbocharger can comprise: a turbine wheel portion which comprises a turbine wheel material and a turbine wheel axis; a shaft portion which comprises a shaft material and a shaft axis; a first weld portion which comprises a first average axial position with respect to a first azimuthal span and a first weld composition made of the turbine wheel material having a greater proportion than the shaft material; and a second weld portion which comprises a second average axial position with respect to a second azimuthal span and a second weld composition made of the turbine wheel material having a greater proportion than the shaft material, wherein a sum of the first azimuthal span and the second azimuthal span is approximately 360 degrees, the first average axial position differs from the second average axial position, and the first weld composition differs from the second weld composition.