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Numerical Simulation of Residual Stress Field in Laser Transformation Hardening for GCr15 Steel Components and Experimental Study

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Abstract:

The laser quenching of GCr15 steel by wide band scanning technology was researched. Hardness and depths of laser transformation hardening zones of samples were also measured experimentally. Temperature field and residual stress field in the laser hardening process were numerically simulated by ANSYS software. The calculated results are in good agreement with the experimental results. The distribution of residual stress is closely related to the temperature distribution made by laser heating process. Then the distribution of residual stresses of the laser surface hardened layers was analyzed by using the X-ray diffraction (XRD). Compressive stresses were detected on the surface of the harden layer after the laser transformation hardening process, and the residual stress value of the surface of samples increases with the increasing of laser power. But the residual stress value of surface melting zones of samples is small.

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Periodical:

Advanced Materials Research (Volumes 538-541)

Pages:

1897-1903

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.538-541.1897

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Online since:

June 2012

Authors:

Sheng Lei, Yan Yan, Heng Li, Liu Niu, Zhong Xiang Gui, Yue Bo Wu

Keywords:

Hardness, Laser Transformation Hardening, Microstructure, Stress Field, Temperature Field

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© 2012 Trans Tech Publications Ltd. All Rights Reserved

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