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首页> 外文期刊>Journal of Iron and Steel Research International >Fatigue Behavior of High Speed Steel Roll Materials for Hot Rolling by Laser Impacting
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Fatigue Behavior of High Speed Steel Roll Materials for Hot Rolling by Laser Impacting

机译：激光冲击热轧高速钢轧制材料的疲劳行为

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摘要

The fatigue behavior of high speed steel (HSS) roll materials for hot rolling was researched under water-cooling conditions by laser impacting. The microstructure of HSS sample and the morphologies of fatigue samples were observed by scanning electron microscope. The phase structure was detected by XRD. The morphology of situ oxide scale was observed by optical microscope, and the expansion coefficient was measured by TGA. The experiment results indicate that the cracks come into being at the carbide-matrix interface, but there are no cracks in the matrix after many times of laser impacting treatment, for the situ sample taken from the fractured roll surface, big carbides are more sensitive to the fatigue, and peel off prior to small ones. The relevant fatigue mechanisms are also discussed.
机译：在水冷条件下，通过激光冲击研究了热轧用高速钢（HSS）轧辊材料的疲劳行为。用扫描电子显微镜观察高速钢试样的显微组织和疲劳试样的形貌。通过XRD检测相结构。用光学显微镜观察原位氧化皮的形貌，并用TGA测量膨胀系数。实验结果表明，裂纹在碳化物-基体界面处形成，但经过多次激光冲击处理后，基体中没有裂纹，对于从断裂的轧辊表面获取的原位试样，大的碳化物对裂纹更敏感。疲劳，并先剥皮。还讨论了相关的疲劳机理。

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