采用拉-拉疲劳实验研究了连续退火与连续热镀锌590 MPa级冷轧双相钢的疲劳性能,绘制了它们的SN曲线,并采用扫描电镜对其疲劳断裂特征进行了分析.结果表明,连续退火与连续热镀锌冷轧双相钢在应力比R=0.1,加载频率为15 Hz的条件下的疲劳极限分别为217和216MPa,通过对疲劳试样表面的观察发现,表面铁素体/马氏体界面开裂是疲劳失效的主要原因.
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