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Materials 2019, 12(5), 793; https://doi.org/10.3390/ma12050793

Computational and Experimental Investigation of Micro-Hardness and Wear Resistance of Ni-Based Alloy and TiC Composite Coating Obtained by Laser Cladding

1
School of Mechanical & Automotive Engineering, Fujian University of Technology, Fuzhou 350118, China
2
School of Engineering + Technology, Western Carolina University, Cullowhee, NC 28723, USA
3
Digital Fujian Industrial Manufacturing IoT Lab, Fuzhou 350118, China
*
Author to whom correspondence should be addressed.
Received: 3 February 2019 / Revised: 26 February 2019 / Accepted: 3 March 2019 / Published: 7 March 2019
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Abstract

The influence of processing parameters on the micro-hardness and wear resistance of a Ni-based alloy and titanium carbide (TiC) composite cladding layer was studied. Mathematical models were developed to predict the micro-hardness and wear resistance of the cladding layer by controlling the laser cladding processing parameters. Key processing parameters were the laser power, scanning speed, gas flow, and TiC powder ratio. The models were validated by analysis of variance and parameter optimization. Results show that the micro-hardness is positively correlated with laser power and TiC powder ratio, where the TiC powder ratio shows the most significant impact. The wear volume decreased with an increasing TiC powder ratio. The targets for the processing parameter optimization were set to 62 HRC for micro-hardness and a minimal volume wear. The difference between the model prediction value and experimental validation result for micro-hardness and wear volume were 1.87% and 6.33%, respectively. These models provide guidance to optimize the processing parameters to achieve a desired micro-hardness and maximize wear resistance in a composite cladding layer. View Full-Text
Keywords: Ni35A + TiC composite; laser cladding; central composite design; micro-hardness; wear resistance Ni35A + TiC composite; laser cladding; central composite design; micro-hardness; wear resistance
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Lian, G.; Zhang, H.; Zhang, Y.; Yao, M.; Huang, X.; Chen, C. Computational and Experimental Investigation of Micro-Hardness and Wear Resistance of Ni-Based Alloy and TiC Composite Coating Obtained by Laser Cladding. Materials 2019, 12, 793.

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