Three-dimensional numerical simulation of transient temperature field and coating geometry in powder feeding laser cladding

被引：0

作者：

机构：

[1] Key Laboratory of Mechanics in Advanced Manufacturing, Institute of Mechanics, Chinese Academy of Sciences

来源：

Yu, G. (gyu@imech.ac.cn) | 1600年 / Science Press卷 / 40期

关键词：

Coating geometry; Laser cladding; Laser technique; Numerical simulation; Transient temperature field;

D O I：

10.3788/CJL201340.1203007

中图分类号：

学科分类号：

摘要：

A three-dimensional numerical model based on the birth-death element method is developed on the basis of characteristics of powder feeding laser cladding. The model, which takes the laser power attenuation by the powder stream and the heating of powder particles in the powder feeding process into account, has the capability of predicting the transient thermal field and coating geometry. Temperature distribution and geometric characteristic of coating during laser cladding process are investigated. The results show that the temperature field and coating geometry keep stable after a short initial stage of the process. Experiments with different powder feeding rates are performed to validate the calculated results. The calculated coating width, height and depth, as well as outline of coating, agree with the experimental ones, so the reliability of the model is proved.

引用

共 14 条

[1]

Vilar R., Laser cladding, Journal of Laser Applications, 11, 2, pp. 64-79, (1999)

[2]

Toyserkani E., Khajepour A., Corbin S., Laser Cladding, pp. 1-40, (2005)

[3]

Wu Y., Yu G., He X., Et al., Research on processing of laser cladding Ta-W alloy coatings, Chinese J Lasers, 38, 8, (2011)

[4]

Ocelik V., de Oliveira U., de Boer M., Et al., Thick Co-based coating on cast iron by side laser cladding: analysis of processing conditions and coating properties, Surface & Coatings Technology, 201, 12, pp. 5875-5883, (2007)

[5]

Cheikh H.E., Courant B., Branchu S., Et al., Analysis and prediction of single laser tracks geometrical characteristics in coaxial laser cladding process, Optics and Lasers in Engineering, 50, 3, pp. 413-422, (2012)

[6]

Ni L., Liu J., Wu Y., Et al., Optimization of laser cladding process variables based on neural network and particle swarm optimization algorithms, Chinese J Laser, 38, 2, (2011)

[7]

Zhang Y., Yu G., He X., Et al., Numerical study of thermal history in laser aided direct metal deposition process, Science China Physics, Mechanics and Astronomy, 55, 8, pp. 1431-1438, (2012)

[8]

Zhang Y., Yu G., He X., Et al., Numerical and experimental investigation of multilayer SS410 thin wall built by laser direct metal deposition, Journal of Materials Processing Technology, 212, 1, pp. 106-112, (2012)

[9]

Wang L., Felicelli S., Gooroochurn Y., Et al., Optimization of the LENS process for steady molten pool size, Materials Science and Engineering, 474, 1-2, pp. 148-156, (2008)

[10]

Jia W., Lin X., Chen J., Et al., Temperature/stress field numerical simulation of hollow blade produced by laser rapid forming, Chinese J Lasers, 34, 9, pp. 1308-1312, (2007)

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