Patent ID: 11946122
Assignee: NANJING UNIVERSITY OF AERONAUTICS AND ASTRONAUTICS
Field: Materials, metallurgy (Chemistry)
Classification: CPC C  B  Y | IPC B  C

Claim 0:
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.