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.

中文翻译：

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深拉钢丝帘线中纯弯曲疲劳裂纹扩展

研究了直径为 0.25 毫米的钢丝，它是由碳钢制成的，用于轮胎帘线的碳含量为 0.70% 和 0.90%。确定了处理模式、碳含量和珠光体形态对在 10Hz 频率下纯弯曲试验下线材的疲劳强度的影响。考虑了线材的断裂机制。在扫描电子显微镜的帮助下确定微观结构和线的成分对疲劳裂纹轨迹的影响。