Method for preparation of sintered parts from an aluminum sinter mixture

摘要

Described is a process for producing sintered parts from an aluminum sintering mixture, wherein between 10 and 70% by weight of pure aluminum powder and between 30 and 90% by weight of an aluminum alloy powder are mixed to form an aluminum sintering mixture. The aluminum alloy powder is of the following composition:between 14 and 35% by weight of Si;between 1 and 7% by weight of Cu;between 0.3 and 2.5% by weight of Mg;between 0.3 and 6% by weight of a transition metal, the balance aluminum.The pure alloy powder and the aluminum alloy powder are each of a grain size of a maximum of 315 mum. The aluminum sintering mixture is mixed with between 0.5 and 2% by weight of compacting additive. The mix of alloy sintering mixture and compacting additive is compacted to form a green compact. The green compact is then sintered. As no low-melting phases occur in the invention, sintered bodies which are stable in respect of shape are reproducibly obtained in the sintering operation.