The study of laser deep penetration processing on prefabricated cracks of high carbon steel

This paper describes the testing of laser deep penetration processing on controlled fragmentation high carbon steel (50SiMnVB). The objective this research is to make use defects in zones and optimize quality prefabricated cracks. shows that a deeper central crack appear zone when heat input 60 J/mm, appeared affected by martensite microstructure, microhardness magnitude tensile stress. Furthermore, fracture mode mixed-mode (ductile brittle fracture).