4Golnahi H, Mahdieh M H. Trend of laser research devel- opments in global level[J]. Optics Laser Tech. nolo- gy,2006,38(02) :26-29.
5Pedro De La Cruz,Magnus ()den. Effect of laser harden- ing on the fatigue strength and fracture of a B-Mn steel [J]. International Journal of Fatigue, 1998,20(5) ..389-398.