激光喷丸改善零件疲劳性能的研究现状及展望

发布时间：2018-05-04 04:28

本文选题：激光喷丸 + 疲劳性能　；参考：《材料热处理学报》2017年03期

【摘要】：激光喷丸能够提高零件表面硬度、增加压应力幅值及深度,延缓裂纹的萌生和扩展,已成为一种有效改善零件疲劳性能的方法。主要影响激光喷丸零件疲劳性能的因素包括激光能量、喷丸温度及重复喷丸的次数。介绍了激光能量与零件疲劳性能的关系,包括激光能量的传播、转化以及诱导产生的冲击波与零件的相互作用机理。分析了不同处理温度条件下激光喷丸零件的强化机制,并说明了激光喷丸温度与零件服役范围的关系。总结了重复喷丸次数对零件表面强化层的影响。最后从激光喷丸强化机理方面讨论了激光喷丸在改善零件疲劳性能方面的优势,并对进一步的研究方向进行了展望。
[Abstract]:Laser shot peening can improve the surface hardness of parts, increase the amplitude and depth of compressive stress, delay the initiation and propagation of cracks, and become an effective method to improve the fatigue performance of parts. The main factors affecting the fatigue performance of laser shot peening parts include laser energy, shot peening temperature and repeated shot peening times. The relationship between laser energy and the fatigue performance of parts is introduced, including the propagation, transformation of laser energy and the interaction mechanism between the induced shock wave and the parts. The strengthening mechanism of laser shot peening parts under different treatment temperature is analyzed, and the relationship between laser shot peening temperature and service range of parts is explained. The influence of repeated shot peening times on the surface strengthening layer of the parts is summarized. Finally, the advantages of laser shot peening in improving the fatigue properties of parts are discussed from the point of view of laser shot peening strengthening mechanism, and the further research directions are prospected.
【作者单位】：哈尔滨工程大学材料科学与化学工程学院腐蚀科学与表面技术研究所;装甲兵工程学院装备再制造技术国防科技重点实验室;
【基金】：国家自然科学基金重点项目(51535011) 国防“973”计划(61328304)
【分类号】：TG668

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