Pure Bending Fatigue Crack Propagation in Deep-Drawn Steel Cord Filaments

摘要

Wires with diameter 0.25 mm from a carbon steel with 0.70 and 0.90% C for tire cords are studied. The effect of the treatment modes, of the carbon content and of the morphology of pearlite on the fatigue resistance of the wires under pure bending tests at a frequency of 10 Hz is determined. The fracture mechanism of the wires is considered. The influence of the microstructure and of the composition of the wires on the trajectory of fatigue cracks is determined with the help of scanning electron microscopy.