Abstract
Laser surface hardening processing has been applied to Ck45 steel cylindrical rod specimens using Nd: glass laser.
Laser surface hardening processing parameters examined in the present study included three energies (0.25, 0.51 &0.64) J and
number of laser beam sizes, after investigation found that the melting is occur for Ck45 steel alloy at laser energy equal or above
to 0.64J while the laser surface melting processing don’t take place below this value and no significant effect has been observed
below 0.25J. The Ck45 steel samples were examined using X-Ray diffraction technique to determine the phases of
microstructure. Also examined structural and mechanical properties especially the hardness and wear resistance after laser
processing. It was found that the significant increasing in hardness value at the highest energy (0.64J) and high increasing in the
dry sliding wear resistance after laser surface hardening processing.