Patent ID: 7105127
Filing Date: 2006-09-12
Classification: B22F,Y02P,Y02W,Y10T

Abstract:
1. A method for the production of metal chips comprising the steps of: i) providing a mixture of a metal alloy powder with a foaming agent powder, said foaming agent having a given decomposition temperature above which the foaming agent decomposes into gas, and said powders comprising finely dispersed solid particles; ii) pre-compacting the mixture of step i); iii) heating the pre-compacted mixture of step ii) to a temperature below said decomposition temperature and at which permanent bonding of the particles can occurs; v) hot compacting the mixture obtained in step iii) for producing a compacted body made of a metal matrix embedding the foaming agent; and vi) reducing the compacted body into metal fragments and thereby obtaining foamable metal chips.