STEP THREE: Sintering to Metal Part
In order to obtain final metal parts, sintering process is compulsory and critical. The sintering condition needs to be under vacuum atmosphere and high heating temperature. The furnace features for batch processing with high performance and simply operation. Through sintering, remaining binder polymers are the first to be removed at moderate heating temperature. As the temperature increases above the melting point of metal particles, these particles start to fuse and grow to densify reaching almost 98%. It is important to note that shrinkage will occur due to both the removal of binder polymers and the growth of metal particles during the sintering process, but the shrinkage ratio is constant and will be taken into account during 3D modeling.
The as-sintered metal parts possesses good mechanical properties and is ready for variety of industrial use and applications.