Microstructure, microhardness and tribological properties of ferrous sintered cam materials were investigated under two state (sintered and wide-band laser surface quenched).

Study on residual stress of QT600 nodular cast iron hardened by laser quenching;

Reality and application of laser quenching technique;

Solid-phase welding between 40Cr and T10A after surface laser quenching;

Study on laser hardening with curved rectangular beam;

Study on laser hardening technology of 479Q cam shaft;

Effect of laser hardening technical parameters on hardened depth of 40Cr steel;

Study on mechanical properties of phase transformation layer in QT600 nodular cast iron by CO_2 laser quench;

Some ways, such as fining of raw material combined with laser quench of surface, could make the punch surface layer get super fine particles, so as to improve the punch's comprehensive mechanical performance and wearing capacity.

The development at home and abroad of laser quench for improving the wear-resistant properties of the cylinder liner is introduced.

This paper presents the new research achievements and experiment results of the application of 500 W CW YAG laser quenching for engine cylinder block,and then analyses the advantages of YAG laser quenching compared with CO 2 laser quenching.