METHOD FOR PRODUCING ENGINE COMPONENTS WITH A GEOMETRICALLY COMPLEX STRUCTURE

摘要

The invention relates to a method for producing thermally stressed engine components (1) with a geometrically complex structure by means of injection molding metal powder mixed with a binder. Individual components of the engine component are produced as separately molded green and subsequently debindered brown body sections (5, 6) which are assembled into a two- or multi-part brown body (9) and are sintered in the assembled state. The brown body sections (5, 6) have a different shrinkage in the sintering process dependent on the type and shape of the metal powder used, wherein at least one first brown body section (5) that shrinks to a greater extent is automatically pressed onto at least one second brown body section (6) when the assembled brown body (9) is sintered. Connecting elements in the shape of protrusions (7) and recesses (8) which engage into each other in a formfitting manner are provided on the joint surfaces of the brown body sections (5, 6) to be connected, said sections having different shrinkages, such that the brown body section (5) that has protrusions (7) undergoes a greater shrinkage than the brown body section (6) that has recesses (8) when the assembled brown body (9) is sintered.