期刊
POWDER TECHNOLOGY
卷 375, 期 -, 页码 384-396出版社
ELSEVIER
DOI: 10.1016/j.powtec.2020.07.100
关键词
Laser cladding; Microstructure; Titanium carbide; High-energy ball milling; Stainless steel composite
资金
- European Fund for Regional Development
- Walloon Region under convention FEDER Iawatha
Laser cladding was used to fabricate 316L/TiC composite coatings after optimizing the feedstock powder morphology. Firstly, the influences of ball-to-powder ratio (BPR) and milling duration on the morphology were investigated. The BPR of 1: 1 and 2 h of milling was sufficient to attach considerable amount of TiC particles onto 316L particles. Then, the microstructure and hardness behaviors of 15 vol% TiC reinforced 316L coatings were examined. Partial or total dissolution of the original TiC powders led to the formation of a reinforced austenitic microstructure with a hardness increase of 100 HV. This increase is due to a grain refinement effect of the TiC during solidification and the presence of new solidification carbides. Partially dissolved and primary MC globular carbides are well-distributed in the matrix together with few larger MC globular carbides. Furthermore, MC corallike pseudo-primary carbides and MC branched eutectic carbides are observed inside the cells and in intercellular spaces, respectively. (C) 2020 Elsevier B.V. All rights reserved.
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