Numerical Simulation of the Effects of Scanning Velocity on the Process of Laser Transformation Hardening on the Inner Wall of Pump Barrel

Abstract:

This study establishes a 3-D finite element model for the numerical simulation of laser transformation hardening on inner wall of pump barrel through a finite element code-SYSWELD. The change of thermal mechanical parameters with temperature is considered. The temperature field, metallurgy transformation and distribution of residual stress are predicted. The effect of scanning velocity on the temperature, martensite fraction and distribution of residual stress are studied. The results show that peak temperature in the hardened zone reaches to 1067.0°C and the maximum heating and cooling rate of hardened zone are 1.24×104°C/s and 3.68×103°C/s. After treatment, martensite can be obtained as a main phase in the hardened zone whose fraction increases with the decrease of scanning velocity. Compressive stress could be acquired in the hardened zone while the peak of tensile stress exists in the HAZ.

• Periodical: Advanced Materials Research (Volume 502)
• Pages: 217-221
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.502.217
• Online since: April 2012
• Authors: Zhe Zhang, Bin Han, Yong Wang, Nan Nan Wang
• Keywords: Laser Transformation Hardening, Numerical Simulation, Residual Stress Distribution, Scanning Velocity

References

[1] R. Komanduri, Z.B. Hou, Thermal analysis of laser surface transformation hardening—optimization of process parameters, International Journal of Machine Tools and Manufacture. 44 (2004) 991-1008.

DOI: 10.1016/j.ijmachtools.2004.01.011

[2] Lin Li, The advances and characteristics of high-power diode laser materials processing, Optics and Lasers in Engineering. 34 (2000) 231-253.

DOI: 10.1016/s0143-8166(00)00066-x

[3] Xiu-bo LIU, Gang YU, Jian GUO, et al, Analysis of Laser Surface Hardened Layers of Automobile Engine Cylinder Liner, Journal of Iron and Steel Research, International. 14 (2007) 42-46.

DOI: 10.1016/s1006-706x(07)60010-7

[4] Jay C. Rozzi, Frank E. Pfefferkorn, Frank P. Incropera, et al, Transient, three-dimensional heat transfer model for the laser assisted machining of silicon nitride: I. Comparison of predictions with measured surface temperature histories, International Journal of Heat and Mass Transfer. 43 (2000) 1409-1424.

DOI: 10.1016/s0017-9310(99)00217-3

[5] Y. Tian, Y.C. Shin, Thermal modeling for laser assisted machining of silicon nitride ceramics with complex features, ASME Journal of Manufacturing Science and Engineering. 128 (2006) 425-434.

DOI: 10.1115/1.2162906

[6] Rahul Patwa, Yung C. Shin, Predictive modeling of laser hardening of AISI5150H steels, International Journal of Machine Tools and Manufacture. 47 (2007) 307-320.

DOI: 10.1016/j.ijmachtools.2006.03.016

[7] SYSWELD. Engineering guide of training and Toolbox[M]. ESI Group, France, 2004.

[8] B. Brickstad, B. L. Josefson, A parametric study of residual stresses in multi-pass butt-welded stainless steel pipes, International Journal Of Pressure Vessels And Piping., 75 (1998) 11-25.

DOI: 10.1016/s0308-0161(97)00117-8

[9] M.J. Tobar, C. Álvarez, J.M. Amado, et al, Laser transformation hardening of a tool steel: Simulation-based parameter optimization and experimental results, Surface & Coatings Technology, 200 (2006) 6362-6367.

DOI: 10.1016/j.surfcoat.2005.11.067

[10] Chaowen Li, Yong Wang, Bin Han, Microstructure, hardness and stress in melted zone of 42CrMo steel by wide-band laser surface melting, Optics and Lasers in Engineering. 49 (2011) 530-535.

DOI: 10.1016/j.optlaseng.2010.12.008

[11] P.J. Cheng, S.C. Lin, An analytical model for the temperature field in the laser forming of sheet metal, Journal of Materials Processing Technology. 101 (2000) 260-267.

DOI: 10.1016/s0924-0136(99)00411-2