Single-track forming control method for in-situ synthesis of WC by laser cladding

doi:10.13251/j.issn.0254-6051.2022.06.041

Abstract

Abstract: Central composite design of response surface method was adopted to establish a mathematical model between the laser power, scanning speed, gas flow rate, WC powder ratio and the width, height, and cross-sectional area of the clad layer. The validity of the mathematical model was established by the analysis of variance and model verification. The clad width is proportional to the laser power, but inversely proportional to the scanning speed, gas flow rate and powder ratio. The clad height and cross-sectional area is proportinal to the laser power, but inversely proportional to the rising of scanning speed and powder ratio. Finally, the process parameters were optimized with the target of maximizing the clad width and cross-sectional area and minimizing the height. An experimental validation indicates that the error rates between the predicted and actual values for the clad width, height and cross-sectional area are 9.439%, 5.153% and 4.835%, respectively. The average error rate is less than 6.5%, further verifying the accuracy of the established model. The research results provide a theoretical reference for the prediction, control and optimization of process parameters of the forming quality of in-situ synthesis WC by laser cladding.

Key words: laser cladding, central composite design, forming control, multi-objective optimization

CLC Number:

Xiao Shihong, Lian Guofu, Huang Xu, Feng Meiyan. Single-track forming control method for in-situ synthesis of WC by laser cladding[J]. Heat Treatment of Metals, 2022, 47(6): 222-231.

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