Enhancement of Dry Sliding Wear Characteristics of CK45 Steel Alloy by Laser Surface Hardening Processing

摘要

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.