TRAIN WHEELS MANUFACTURING www.train-wheels.com BLOOMCROPPING Using a cutting machine, the cooled round steel is cut into small pieces to obtain wheel moulds. Each wheel mould weighs approximately 450 kg HEATING The cut wheel moulds are heated in a rotary oven to 1300 ℃. PREFORMING Preforming refers to the use of a preforming machine to initially forge the billet after it has been heated to a certain temperature, to make an intermediate billet FORMING Forming by die forging, resulting in a more homogeneous and compact structure of the train wheels. ROLLING Shaping of wheels to standard diameters using roll mills PUNCHING Pressing out the round hole for mounting the axle in the centre of the rail wheel COOLING Allow the wheels to cool down naturally and reach a certain hardness HEATING Heating before quenching increases the plasticity of the metal and reduces the deformation resistance QUENCHING Spray the surface of the wheel with cold water to harden the steel TEMPERING The wheels as a whole were tempered at 520 ± 10°C. Holding for 90 minutes to recrystallise and austenitise the rolled tissue MACHINING Removal of surface oxidation and precise machining of dimensions such as the inner and outer diameters of wheels. BALACING Relates to the stability of the wheel at high speeds, the smaller the value, the higher the stability MARKING Manufacturing year and month, manufacturing unit code, wheel steel grade code, wheel model, inspector's mark, etc. HARDNESS TESTING Checking the load carrying capacity and wear resistance of the wheels to ensure smoothness and safety during travelling If you have any questions related to railway wheels manufacturing, please visit www.train-wheels.co