Microstructure and Properties of WC Particles Reinforced 316L Stainless Steel Composites Prepared by Additive and Subtractive Manufacturing

doi:10.12068/j.issn.1005-3026.2022.02.007

Abstract

Abstract: Using the own-patented technology and equipment for additive/subtractive manufacturing， the effects of laser power(270， 300 and 330W)and WC mass fraction(0， 2.5%， 5%， 10% and 15%)on the densification， microstructure evolution and surface wear resistance of the WC particles reinforced 316L stainless steel composites were investigated. The results show that with the increase of WC mass fraction， the density firstly increases and then decreases， while the hardness and wear resistance increase gradually. Excessive WC particles will cause thermal cracks and reduce the surface quality of the additive parts. When the laser power increases from 270W to 330W， the powders are fully melted， and the non-fusion defects obviously reduce after solidification. When the mass fraction of WC particles is 5% and the laser power is 330W， the density of the additive parts can reach up to 99.6%. The findings indicate that mechanical property， wear resistance and surface quality of the 316L matrix can be significantly improved by the WC reinforcements.

Key words: additive/subtractive manufacturing; particle reinforcement; 316L stainless steel; density; microstructure; mechanical property

CLC Number:

TG141

ZHAO Yu-hui ， GAO Meng-qiu ， ZHAO Ji-bin ， HE Chen. Microstructure and Properties of WC Particles Reinforced 316L Stainless Steel Composites Prepared by Additive and Subtractive Manufacturing[J]. Journal of Northeastern University(Natural Science), 2022, 43(2): 197-205.

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