Study on Fatigue Property of Wheel Steel Under Different Processing Methods

摘要

The effects of different process routes on fatigue properties of DP600 and FB540 two wheel steels are studied, including the raw material (R), pre drawing (RP), and baking (RPB). With standard tensile specimens as the experimental object, the tensile test and the tension-compression cyclic loading fatigue test have yielded basic parameters of materials, including the material's stress-strain curve and strain life fatigue curve. Simple sample simulation results verify the quasi static analysis method with the feasibility study. After obtaining the basic parameters of the material, according to the basis of the wheel to change wheel shape, the fatigue life of the wheel and the new wheel of modified shape, the quasi-static analysis method for stress and strain on the wheel were undertaken using ANSYS software to study the strain fatigue analysis between the original and new modified wheel. Studying the influence of the bending fatigue life with an original wheel and a diverted wheel, analysis results showed the influence of different material technologies on the material of the original wheel and the diverted wheel. The influence had the same tendency: the wheel modification achieved the goal of losing wheel weight. Finally, experimental verification of the modified wheel, simulation and experimental results show that, simulation results and fatigue life test results were approximate. The crack that appeared in the wheel fatigue experiment had a consistent position with the fatigue life simulation minimum cycle times. The validity of the fatigue strain and fatigue life analysis is verified. This paper provides an effective way to study the influence of material technology on the properties of materials, and it has a certain practical value.