Method for manufacturing objects using powder products
A method for manufacturing a three-dimensional part. The method includes: performing partial densification processing on loose machining powder, to form a densified and sealed enclosure, where there is still loose machining powder accommodated inside the enclosure; and performing overall densification processing on the enclosure and the machining powder inside the enclosure, so as to implement metallurgical bonding between the machining powder inside the enclosure and the enclosure during the densification, thereby forming a target three-dimensional part.
1. A method for manufacturing a target object, the method comprising:
forming a shell containing powder and/or a sintered supporting pattern using an electron beam melting (EBM) technology, the shell comprising a densified and sealed enclosure corresponding to a target object, and the shell having a compensated shape that has a volume exceeding that of the target object; and
subjecting the shell containing the powder and/or the sintered supporting pattern to a hot isostatic pressing (HIP) treatment or a pneumatic isostatic forging (PIF) treatment, the HIP treatment or the PIF treatment conforming the compensated shape to an expected shape of the target object and metallurgically bonding the shell to the powder and/or the sintered support pattern within the sealed enclosure, thereby forming the target object{circumflex over ( )}
wherein the shell comprises an outermost layer, the outermost layer having a density level of greater than 95%: and
wherein the shell comprises at least two layers, and the density levels of the at least two layers gradually reduce from outside to inside.
2. The method according to claim 1 , further comprising:
(A) storing an original three-dimensional space model, wherein the original three-dimensional space model and the target object are in the same shape;
(B) analyzing a shape change of the shell expected from the HIP treatment or the PIF treatment; and
(C) calculating a compensated three-dimensional space model based at least in part on the shape change, the compensated three-dimensional space model corresponding to the compensated shape.
3. The method according to claim 1 , wherein forming the shell comprises:
forming an enclosure comprising an airway tube extending therefrom;
connecting the airway tube to an air-extracting apparatus;
extracting gas from the enclosure so as to form a vacuum within the enclosure; and
sealing the enclosure so as to form the sealed enclosure.
4. The method according to claim 1 , further comprising:
selectively mechanically and plastically deforming an outer surface of the shell prior to subjecting the shell to the HIP treatment or the PIF treatment.
5. The method according to claim 4 , wherein selectively mechanically and plastically deforming comprises peening, burnishing, cold extrusion, or warm extrusion.
6. The method according to claim 1 , comprising performing the PIF treatment.
7. The method according to claim 1 , wherein the at least two layers comprises one or more internal layers, at least one of the internal layers comprising a central section and a side section, the central section having a density level greater than the side section.
8. The method according to claim 1 , comprising: forming the sintered supporting pattern using the EBM technology.
9. The method according to claim 1 , comprising performing the HIP treatment.
10. The method according to claim 1 , wherein the target object comprises a turbine engine part.
11. The method according to claim 10 , wherein the turbine engine part comprises a disk, a ring, a blisk, a shaft, a blade, a vane, a case, or a tube.
12. The method according to claim 1 , comprising:
concurrently forming a plurality of target objects according to the method of claim.