Patent ID: 9101982
Filing Date: 2015-08-11
Classification: B22F,C22C,Y10T

Abstract:
1. A method for the manufacture of a multilevel metal part, said method comprising the steps: a. compacting agglomerated spherical metal powder to a green multilevel preform with a density such that an open porosity exists, the agglomerated spherical metal powder comprising a binder, wherein the green multilevel preform has at least two different heights in z-direction in a three dimensional Cartesian coordinate system, wherein the ratio between the highest height z wherein the green multilevel preform fulfils the relation for all points in the xy-plane, wherein z wherein z b. debinding the green preform, c. sintering the green preform in an atmosphere comprising hydrogen with a dewpoint not exceeding −40° C., d. compacting the sintered preform uniaxially along the z-axis with high velocity compaction to a density of at least 95% TD, and e. subjecting the part to densification to a density of at least 99% TD, wherein the densification is performed using hot isostatic pressing.