US 11,724,298 B1
Forming method of nickel aluminum alloy tubular part with micro flow channels
Ying Sun, Dalian (CN); and Shijian Yuan, Dalian (CN)
Assigned to DALIAN UNIVERSITY OF TECHNOLOGY, Dalian (CN)
Filed by Dalian University of Technology, Dalian (CN)
Filed on Jul. 14, 2022, as Appl. No. 17/865,045.
Claims priority of application No. 202210668195.1 (CN), filed on Jun. 14, 2022.
Int. Cl. B21C 37/08 (2006.01); B32B 15/01 (2006.01); F16L 9/02 (2006.01); F16L 9/19 (2006.01)
CPC B21C 37/08 (2013.01) [B32B 15/017 (2013.01); F16L 9/02 (2013.01); F16L 9/19 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A forming method of a nickel aluminum (NiAl) alloy tubular part with micro flow channels, comprising the following steps in order:
S1, continuously winding a nickel (Ni) flexible substrate and an aluminum (Al) flexible substrate around a same winding center line to form a first nickel-aluminum (Ni—Al) laminated structure with a plurality of layers, wherein an outermost layer and an innermost layer of the first Ni—Al laminated structure are both Ni layers, and treating the first Ni—Al laminated structure into a whole to obtain a laminated tube blank;
S2, fixing a plurality of aluminum wires to an outer surface of the laminated tube blank to obtain a middle tube blank;
S3, continuously winding the Ni flexible substrate and the Al flexible substrate on an outer surface of the middle tube blank to form a second Ni—Al laminated structure having a plurality of layers, wherein an outermost layer and an innermost layer of the second Ni—Al laminated structure are both Ni layers, and treating the second Ni—Al laminated structure and the middle tube blank into a whole to obtain a composite tube blank;
S4, placing the composite tube blank into a mold for hot gas forming to obtain a composite tubular part;
S5, carrying out in-mold first-stage reaction synthesis to make the Ni flexible substrate chemically react with the Al flexible substrate to obtain a first intermediate of the NiAl alloy tubular part;
S6, carrying out in-mold second-stage reaction synthesis to melt all the aluminum wires to obtain a second intermediate of the NiAl alloy tubular part with a plurality of channel structures; and
S7, carrying out hot isostatic pressing treatment on the second intermediate of the NiAl alloy tubular part to obtain the NiAl alloy tubular part with the micro flow channels.