Numerical simulation and experiment on hot forging of high-Mn steel turnout core

The core of railway turnout is generally cast from high manganese steel, but the casting turnout core will produce porosity, cracks, and other casting defects. By analyzing the structure characteristics and forming difficulties of the turnout core, finite element software simulates the forging process, and the influence of forging parameters on the distribution law of the medium effect field, temperature field, die load, and billet damage is systematically studied. In addition, the main parameters (forging temperature, forging speed, and friction between billet and die) are designed and optimized by the response surface method, and the comprehensive optimal solutions are determined. Using the optimum parameters to forge, the forging force of the die and the damage of the forging are reduced. Besides the forming effect, the mechanical properties of the forging are also improved in different amplitudes, and the comprehensive mechanical properties are far better than the core of the casting turnout.