Optimization of Laser Cladding Process Parameters of 35CrMoV Piston Rod Based on Grey Correlation Analysis

doi:10.3969/j.issn.1000-1093.2018.10.022

Abstract

Abstract: The laser cladding technology for repairing the worn surface of substrate with 35CrMoV is studied to optimize reasonably the laser cladding process parameter and obtain the cladding layer with excellent compactness and stronger abrasion resistance. The experimental data are processed on the basis of the theoretical model of grey system and the orthogonal test data, of which the scanning speed, laser power and speed of powder delivery are variable. The analytic hierarchy method is used to calculate the multi-target weight, and the grey correlation theory is used to calculate the correlation coefficient of each process parameter for the ideal single target value and the correlation degree to the multiple target value. Single target parameter optimization is converted to the integrate parameter optimization. The scanning line speed is 100 mm/s, the powder delivery speed is 42.8 g/min, and the laser power is 1.8 kW. The optimized results are verified experimentaly. The research shows that, under the the condition of optimal process parameters, the quality of cladding layer is obviously improved, and the wear resistance is increased by 43%. Key

Key words: 35CrMoVpistonrod, lasercladding, processparameter, wearrate, correlation

CLC Number:

TG665

ZHAO Dan-dan, JIAO Feng. Optimization of Laser Cladding Process Parameters of 35CrMoV Piston Rod Based on Grey Correlation Analysis[J]. Acta Armamentarii, 2018, 39(10): 2073-2080.

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