Study on Microstructure Tempering Stability of Cr12MoV Steel Wide-band Laser Quenching
The wide-band laser surface quenching for Cr12MoV steel treated conventionally was carried on by CO2 laser equipment.Subsequently the laser-quenched samples were tempered at various temperature.The results show that laser hardened steel has good microstructure stability at relatively high temperature,especially the secondary hardening occurrs obviously during tempering.The reason for enhancing tempering stability was analyzed by means of SEM observation.