US 11,946,122 B2
Micron silver particle-reinforced 316L stainless steel matrix composite and preparation method thereof
Dongdong Gu, Nanjing (CN); Kaijie Lin, Nanjing (CN); Jingfeng Quan, Nanjing (CN); Yamei Fang, Nanjing (CN); Qing Ge, Nanjing (CN); Jie Zhuang, Nanjing (CN); Yang Liu, Nanjing (CN); Weisong Dong, Nanjing (CN); and Pengjiang Shuai, Nanjing (CN)
Assigned to NANJING UNIVERSITY OF AERONAUTICS AND ASTRONAUTICS, Nanjing (CN)
Appl. No. 17/263,876
Filed by NANJING UNIVERSITY OF AERONAUTICS AND ASTRONAUTICS, Nanjing (CN)
PCT Filed Jul. 23, 2020, PCT No. PCT/CN2020/103772
§ 371(c)(1), (2) Date Jan. 27, 2021,
PCT Pub. No. WO2021/174750, PCT Pub. Date Sep. 10, 2021.
Claims priority of application No. 2020 10153865.7 (CN), filed on Mar. 6, 2020.
Prior Publication US 2022/0112584 A1, Apr. 14, 2022
Int. Cl. C22C 38/00 (2006.01); B22F 1/05 (2022.01); B22F 1/065 (2022.01); B22F 9/04 (2006.01); B22F 10/28 (2021.01); B22F 10/322 (2021.01); B22F 10/36 (2021.01); B22F 10/366 (2021.01); B23K 26/00 (2014.01); B23K 26/342 (2014.01); B33Y 10/00 (2015.01); B33Y 70/00 (2020.01); B23K 103/04 (2006.01)
CPC C22C 38/007 (2013.01) [B22F 9/04 (2013.01); B22F 10/28 (2021.01); B22F 10/36 (2021.01); B22F 10/366 (2021.01); B23K 26/0006 (2013.01); B23K 26/342 (2015.10); B33Y 70/00 (2014.12); B22F 1/05 (2022.01); B22F 1/065 (2022.01); B22F 2009/043 (2013.01); B22F 10/322 (2021.01); B22F 2301/255 (2013.01); B22F 2301/35 (2013.01); B22F 2304/10 (2013.01); B23K 2103/05 (2018.08); B33Y 10/00 (2014.12)] 8 Claims
OG exemplary drawing
 
1. A preparation method of a micron silver particle-reinforced 316L stainless steel matrix composite, comprising the following steps:
(1) mixing raw materials of a spherical silver powder and a spherical 316L stainless steel powder and subjecting a resulting mixture to mechanical ball milling to obtain a mixed powder, wherein, the spherical silver powder has a mass fraction of % to 5% in the mixed powder; and
(2) sieving the mixed powder, adding a resulting powder to a powder cylinder of an SLM forming machine, and printing the resulting powder under a condition of charging an inert protective gas, to obtain the micron silver particle-reinforced 316L stainless steel matrix composite;
wherein the micron silver particle-reinforced 316L stainless steel matrix composite comprises a 316L stainless steel matrix and silver particles uniformly distributed in the 316L stainless steel matrix, wherein, the silver particles have a weight 1% to 5% of the total weight of the micron silver particle-reinforced 316L stainless steel matrix composite; and the micron silver particle-reinforced 316L stainless steel matrix composite has a density of 7.9 g/cm3 to 8.2 g/cm3 and a relative density of more than 98%; and
in step (1), milling balls used in the mechanical ball milling are made of zirconia, a ratio of a total mass of the spherical silver powder and the spherical 316L stainless steel powder to a mass of the milling balls is 1:1, and the ball milling is conducted for 4 h to 6 h.