Engine block with a cast-in cylinder liners of a plurality of layers of material and method for the preparation of the cylinder liners

摘要

Engine block with a cast-in cylinder bushings, which several layers of material of different strength and wear resistance, with at least an inner layer forming a track and at least one relative to the outer layer forming the bushings base body, wherein the bushing body from a high strength aluminum alloy or by means of reinforcing agents reinforced aluminum alloy, and the running track by means of a barrel and is capable of al - si - alloy is formed,as well as manufacturing method for cylinder liners, in particular by centrifugal casting of an al - alloy with si - particles, in such a way that the si - particles in the inner region with the formation of an executable al - si - alloy increases, and on the other in the outer region with the formation of a solid aluminum alloy depleted.