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Laser Surface Hardening of GCr15 Bearing Steel Ring
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Laser Surface Hardening of GCr15 Bearing Steel Ring

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Abstract:

Surface hardening of GCr15 bearing steel ring was carried out using CW CO2 laser. The laser power used was in the range of 300 to 500 Watts. A rectangular beam shape was used to cover the area to be hardened. A three fold increase in the hardness of the transformed zone was achieved. The depth of hardness attained was around 1mm. The depth and width of the laser treated zone were studied as function of laser power and working speed for specific spot size. The microstructure of the transformed zone is also discussed. Subzero cooling technique was applied to convert the retained austenite to martensite.

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Advanced Materials XI View Preview

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Periodical:

Key Engineering Materials (Volume 442)

Pages:

130-136

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.442.130

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Online since:

June 2010

Authors:

R. Akhter, A. Hussain, W.A. Farooq, M. Aslam

Keywords:

Aging, Bearing Steel, GCr15, Hardening, Laser, Subzero Treatment, Tempering

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© 2010 Trans Tech Publications Ltd. All Rights Reserved

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