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公开(公告)号：US12172203B2
公开(公告)日：2024-12-24
申请号：US17724879
申请日：2022-04-20
Applicant: Dalian University of Technology
Inventor： Shijian Yuan , Ying Sun
Abstract: An overlapping and progressive forming method for a high-performance multi-element NiAl-based alloy tubular part, including: winding continuously flexible substrates of Ni and Al, and alloying coating continuously or selectively along a width direction or a rolling direction to obtain coated flexible substrates; winding continuously the coated flexible substrates on an outer surface of a core roller according to a sequence of Ni above and Al below to form a Ni/Al laminated structure having a plurality of layers with an outermost layer being a Ni layer, and consolidating with ultrasonic with assistance of a pulse current to combine the continuously wound flexible substrates into a laminated tube blank; and placing the laminated tube blank into a mold, applying a pulse current to both ends of the laminated tube blank for hot fluid high-pressure forming, and synthesizing in-situ to prepare the tubular part with assistance of the pulse current.
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公开(公告)号：US11724298B1
公开(公告)日：2023-08-15
申请号：US17865045
申请日：2022-07-14
Applicant: Dalian University of Technology
Inventor： Ying Sun , Shijian Yuan
CPC classification number: B21C37/08 , B32B15/017 , F16L9/02 , F16L9/19
Abstract: A forming method of a nickel aluminum (NiAl) alloy tubular part with micro flow channels including preparing a laminated tube blank. A step of fixing aluminum wires to an outer surface of the laminated tube blank to prepare a middle tube blank. A step of winding a nickel (Ni) flexible substrate and an Al flexible substrate on an outer surface of the middle tube blank to prepare a composite tube blank. A step of carrying out hot gas forming on the composite tube blank to prepare a composite tubular part. A step of carrying out in-mold first-stage reaction synthesis to make the Ni flexible substrate chemically react with the aluminum (Al) flexible substrate. A step of carrying out in-mold second-stage reaction synthesis to melt all the aluminum wires. A step of carrying out hot isostatic pressing treatment to prepare the NiAl alloy tubular part with the micro flow channels.
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公开(公告)号：US11229939B1
公开(公告)日：2022-01-25
申请号：US17350826
申请日：2021-06-17
Applicant: DALIAN UNIVERSITY OF TECHNOLOGY
Inventor： Zhubin He , Yi Xu , Jiangkai Liang , Ying Sun , Shijian Yuan
IPC: B21D26/027 , B21D37/16 , B21D26/053 , C23C10/28 , C23C26/00 , C21D9/52 , C22C19/03 , C22C14/00
Abstract: The present invention provides a method for manufacturing a curved thin-walled intermetallic compound component by winding a mandrel with metal foil strips, which comprises the following steps: designing a prefabricated blank; preparing a support mandrel; determining thicknesses and layer numbers of foil strips; determining widths of the foil strips; establishing a laying process; pretreating surfaces of the foil strips; laying A foil and B foil; carrying out bulge forming on the prefabricated blank; carrying out diffusion reaction and densification treatment on a bulged component; and carrying out subsequent treatment of a thin-walled component. The present invention can solve the problems that impurities generated in the separation process of a support mould and a laminated foil prefabricated blank influence the final performance of a part, and a single homogeneous intermetallic compound component in thickness direction has poor plasticity and toughness at room temperature.
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4.发明公开公开(公告)号：US20230182188A1
公开(公告)日：2023-06-15
申请号：US17724879
申请日：2022-04-20
Applicant: Dalian University of Technology
Inventor： Shijian Yuan , Ying Sun
CPC classification number: B21C47/045 , C22C19/007 , C22C21/00 , B21C47/063 , B21C47/26 , B21C37/30 , B21C37/14
Abstract: An overlapping and progressive forming method for a high-performance multi-element NiAl-based alloy tubular part, including: winding continuously flexible substrates of Ni and Al, and alloying coating continuously or selectively along a width direction or a rolling direction to obtain coated flexible substrates; winding continuously the coated flexible substrates on an outer surface of a core roller according to a sequence of Ni above and Al below to form a Ni/Al laminated structure having a plurality of layers with an outermost layer being a Ni layer, and consolidating with ultrasonic with assistance of a pulse current to combine the continuously wound flexible substrates into a laminated tube blank; and placing the laminated tube blank into a mold, applying a pulse current to both ends of the laminated tube blank for hot fluid high-pressure forming, and synthesizing in-situ to prepare the tubular part with assistance of the pulse current.
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