公开(公告)号：US11946122B2

公开(公告)日：2024-04-02

申请号：US17263876

申请日：2020-07-23

Applicant: NANJING UNIVERSITY OF AERONAUTICS AND ASTRONAUTICS

Inventor： Dongdong Gu ,  Kaijie Lin ,  Jingfeng Quan ,  Yamei Fang ,  Qing Ge ,  Jie Zhuang ,  Yang Liu ,  Weisong Dong ,  Pengjiang Shuai

IPC: C22C38/00 ,  B22F1/05 ,  B22F1/065 ,  B22F9/04 ,  B22F10/28 ,  B22F10/322 ,  B22F10/36 ,  B22F10/366 ,  B23K26/00 ,  B23K26/342 ,  B33Y10/00 ,  B33Y70/00 ,  B23K103/04

CPC classification number: C22C38/007 ,  B22F9/04 ,  B22F10/28 ,  B22F10/36 ,  B22F10/366 ,  B23K26/0006 ,  B23K26/342 ,  B33Y70/00 ,  B22F1/05 ,  B22F1/065 ,  B22F2009/043 ,  B22F10/322 ,  B22F2301/255 ,  B22F2301/35 ,  B22F2304/10 ,  B23K2103/05 ,  B33Y10/00 ,  B22F2998/10 ,  B22F1/052 ,  B22F2009/043 ,  B22F10/28

Abstract: The present disclosure relates to a micron silver particle-reinforced 316L stainless steel matrix composite, including a 316L stainless steel matrix and silver particles uniformly distributed in the 316L stainless steel matrix. The silver particles have a weight 1% to 5% of the total weight of the composite; and the composite has a density of 7.9 g/cm3 to 8.2 g/cm3 and a relative density of more than 98%. The composite is prepared by the following method: mixing raw materials of a spherical silver powder and a spherical 316L stainless steel powder; subjecting a resulting mixture to mechanical ball milling to obtain a mixed powder; sieving the mixed powder and adding a resulting powder to a powder cylinder of an SLM forming machine; and charging an inert protective gas for printing to obtain the composite.

公开(公告)号：US11826827B2

公开(公告)日：2023-11-28

申请号：US18000830

申请日：2021-10-21

Applicant: NANJING UNIVERSITY OF AERONAUTICS AND ASTRONAUTICS

Inventor： Dongdong Gu ,  Xinyu Shi ,  Yanze Li ,  Donghua Dai ,  Qing Ge ,  Yixuan Sun

IPC: B22F12/53 ,  B33Y30/00 ,  B29C64/35 ,  B29C64/209

CPC classification number: B22F12/53 ,  B29C64/35 ,  B33Y30/00 ,  B29C64/209

Abstract: A coaxial powder-feeding nozzle includes a partition wall-type shell, a powder flow area, a cooling liquid flow area and a shielding gas conveying channel. A powder self-cleaning filter is on the outer side of the partition wall-type shell; the powder self-cleaning filter includes a set of powder collecting tubes on each side of the partition wall-type shell in the axial direction; each set of powder collecting tubes includes at least one powder collecting tube; under the coaction of a suction force applied by a powder collecting system and the self-weight of residual powder, a residual powder inlet of each powder collecting tube causes the residual powder on the opposite side to roll down to the bottom along the wall surface of a metal tube to be processed on the same side, and to be gathered at the front end of the residual powder inlet of the powder collecting tube.