Effects of Heat Accumulation on Temperature Field during Multi-Track Laser Cladding of Preset MCrAlY Coating

Abstract:

To investigate influences of multi-track overlapping on melting of preset MCrAlY coating during laser cladding plasma spraying, a three-dimensional finite element model of the continuously moving temperature field during multi-track laser cladding was constructed using the ANSYS parametric design language (APDL) based on the existing temperature field model during single-track laser cladding. According to analysis results of temperature field, temperature of samples increases gradually during laser cladding due to heat accumulation effect of laser scanning, and the molten pool expands gradually. There are evident differences among different scanning pathways. Therefore, it is impossible to get high-quality cladding coating with uniform melting and small dilution ratio. Molten pools with basically same sizes in different scanning pathways can be gained by decreasing laser power or increasing scanning speed in different tracks one by one. Similarly, differences of molten pools in different scanning pathways can be relieved effectively through preheating of samples. Through a closed-loop control over the highest cladding temperature, a more even cladding coating can be gained through adaptive control of laser power and / or scanning speed.

• Periodical: Materials Science Forum (Volume 1020)
• Pages: 157-163
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.1020.157
• Online since: February 2021
• Authors: Dong Sheng Wang*, Hao Yang, Li Ye Yue, Pei Pei Zhang
• Keywords: ANSYS Finite Element, Laser Cladding, Multi-Track Overlapping, Temperature Field

References

[1] J.C. Heigel, M.F. Gouge, P. Michaleris, T.A. Palmer, Selection of powder or wire feedstock material for the laser cladding of Inconel® 625, J. Mater. Process. Technol. 231 (2016) 357-365.

DOI: 10.1016/j.jmatprotec.2016.01.004

[2] D. Bartkowski, Mły A. narczak, A. Piasecki, B. Dudziak, M. Gościański, A. Bartkowska, Microstructure, microhardness and corrosion resistance of Stellite-6 coatings reinforced with WC particles using laser cladding, Opt. Laser Technol. 68 (2015) 191-201.

DOI: 10.1016/j.optlastec.2014.12.005

[3] Z. Zhang, P. Farahmand, R. Kovacevic, Laser cladding of 420 stainless steel with molybdenum on mild steel A36 by a high power direct diode laser, Mater. Des. 109 (2016) 686-699.

DOI: 10.1016/j.matdes.2016.07.114

[4] J. Liu, H. Yu, C. Chen, F. Weng, J. Dai, Research and development status of laser cladding on magnesium alloys: A review, Opt. Lasers Eng. 93 (2017) 195-210.

DOI: 10.1016/j.optlaseng.2017.02.007

[5] G. Lian, M. Yao, Y. Zhang, C. Chen, Analysis and prediction on geometric characteristics of multi-track overlapping laser cladding, Int. J. Adv. Manuf. Technol. 97 (2018) 2397-2407.

DOI: 10.1007/s00170-018-2107-6

[6] L. Du, D. Gu, D. Dai, Q. Shi, C. Ma, M. Xia, Relation of thermal behavior and microstructure evolution during multi-track laser melting deposition of Ni-based material, Opt. Laser Technol. 108 (2018) 207-217.

DOI: 10.1016/j.optlastec.2018.06.042

[7] K.A. Khor, Y.W. Gu, Effects of residual stress on the performance of plasma sprayed functionally graded ZrO2/NiCoCrAlY coatings, Mater. Sci. Eng., A 277 (2000) 64-76.

DOI: 10.1016/s0921-5093(99)00565-1

[8] Y.Gan, Z.L. Tian, H. Dong, China materials engineering ceremony(Vol.3), Chemical Industry Press, Beijing, 2006. (in Chinese).

[9] Y. Chew, J.H.L. Pang, G. Bi, B. Song. Thermo-mechanical model for simulating laser cladding induced residual stresses with single and multiple clad beads, J. Mater. Process. Technol. 224 (2015) 89-101.

DOI: 10.1016/j.jmatprotec.2015.04.031