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 |
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.
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