The invention discloses a
laser strengthening technology for the surface of a steel rail of a railway. The
laser strengthening technology includes the steps that the surface of the steel rail is quenched through lasers, and then a
tempering technology is carried out on the steel rail through lasers. Microscopic structures of the steel rail are tempered
martensite structures and are optimized with a
laser processing technology, evenly-refined sorbite-or-troostite-similar tempered structures with the thickness of 0.8 mm to 1 mm can be obtained on the surface of the steel rail, high rigidity (HRC35-50) and high abrasion resistance are achieved, and meanwhile high bending strength and high fatigue strength are achieved; the sticking resistance, the creeping resistance, the squashing resistance, the side abrasion resistance and the corrugation resistance of the steel rail are improved accordingly. By means of the laser strengthening technology, corrugation, side abrasion and block falling of the steel rail are remarkably reduced on the premise that the mechanical performance such as bending strength, breaking tenacity and fatigue strength of the whole steel rail is guaranteed, the stability and the
corrosion resistance of the steel rail are remarkably improved, the service life of the steel rail is remarkably prolonged, the replacement time of the steel rail is prolonged, the maintenance cost of the steel rail is saved, driving resistance is reduced, fuel is saved, and the service period of the steel rail of the railway is prolonged.