Polymeric compressor wheel with metal sleeve

A compressor wheel comprising:

• an axially extending hub defining a hub volume and having an inlet end, an outlet end and arcuate outer surface and a shaft bore, the axially extending hub comprising a metal, the hub having at least one porous region, the porous region located proximate to the outer surface, the porous region having a plurality of pores extending from the arcuate outer surface to a region interior thereto, wherein the pores in the porous region define between 0.5% and 45% of the hub volume;
• a blade array disposed on the outer arcuate outer surface of the axially extending hub, the blade array having an outer surface and an inner surface, the blade array comprising a plurality of circumferentially-spaced, radially and axially extending blades disposed thereon, the blade array comprising at least in part, a thermosetting polymeric material;
• wherein polymeric material that comprises the blade array extends into the porous region defined in the axially extending hub.