Journal
SURFACE & COATINGS TECHNOLOGY
Volume 408, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.surfcoat.2020.126789
Keywords
Laser re-melting; Morphology; Microstructure; Microhardness; Wear resistance
Funding
- Green Manufacturing System Integration Project of Ministry of Industry and Information Technology of China [201675514]
- Liaoning Provincial Key Laboratory of Large Equipment Intelligent Design and Manufacturing Technology [18006001]
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This study investigated the effect of laser re-melting on the morphology and mechanical properties of cladding layer, showing that appropriate laser power can improve the morphology and enhance microhardness and wear resistance. Excessive re-melting laser power can lead to defects and deterioration of mechanical properties in the cladding layer.
The aim of this paper is to investigate the effect of laser re-melting on the morphology and mechanical properties of cladding layer under different laser power conditions. In this study, the laser re-melting tests were performed on YCF102 cladding layer with different laser power, and the morphology and microstructure of each cladding layer were researched by optical microscopy. Meanwhile, the microhardness and wear resistance of YCF102 cladding layer after laser re-melting with different laser power were studied. The results show that laser remelting can not only improve the morphology of cladding layer, but also improve the microhardness and wear resistance of cladding layer. However, the excessive re-melting laser power leads to the increase of the number of defects in the cladding layer and the deterioration of the mircrohardness and wear resistance of cladding layer. When the re-melting laser power is 650 W, the cladding layer not only has a small surface roughness and no defects, but also has good mechanical properties.
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