Method of production of local ceramic-reinforced casted brake discs from light-metal alloys

摘要

The production of cast light-alloy (preferably AlSi alloy) brake disks which consist of an annular light-alloy element carrying on one or both of its sides a layer made up of open-pore foam-ceramic elements filled with the light alloy. The method comprises metal-coated open-pore ceramic elements before the light alloy is poured into them. The casting material is fed from a crucible via a riser pipe in a casting furnace into a metal mould which containing ceramic elements and is located in a closable container. Both the crucible and the mould are subjected to vacuum. Then pressure is introduced into the casting furnace to deliver the melt into the mould.