Production of the Residual Stress in the Rail and Its Harm

The production cause and the distribution of residual stress had been analyzed through the production process and the application condition of the rail.The results show that the residual stress could be produced either during the production or the service of the rail.The large and irrational residual stress existing in the rail(tensile stress in the rail head and the rail foot,compressive stress in the rail web) would affect the application and the drop hammer properties,resulting in the abrupt fracture of the rail on line or the unqualified the drop hammer test.