Analysis of Causes to Abnormal Wear of Wheel Flanges for Shanghai Metro No.4 Line and Measures for Solution

The materials, mechanical performance and abnormal wear of wheel flange for Shanghai Metro No. 4 Line are described. The effect of wheel-rail system instability, circulation line, wheel and track hardness matching as well as the primary positioning stiffness on the abnormal wear of wheels are researched. The solution measures of improving wheel hardness, periodical end-changing operation of trains as well as installation of wheel flange lubrication equipment are put forward.