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激光冲击强化提高主动连杆振动疲劳性能

李启鹏 李应红 何卫锋 刘海雷

李启鹏, 李应红, 何卫锋, 等 . 激光冲击强化提高主动连杆振动疲劳性能[J]. 北京航空航天大学学报, 2012, 38(1): 69-74.
引用本文: 李启鹏, 李应红, 何卫锋, 等 . 激光冲击强化提高主动连杆振动疲劳性能[J]. 北京航空航天大学学报, 2012, 38(1): 69-74.
Li Qipeng, Li Yinghong, He Weifeng, et al. LSP to improve vibration fatigue performance of deflation valve lever[J]. Journal of Beijing University of Aeronautics and Astronautics, 2012, 38(1): 69-74. (in Chinese)
Citation: Li Qipeng, Li Yinghong, He Weifeng, et al. LSP to improve vibration fatigue performance of deflation valve lever[J]. Journal of Beijing University of Aeronautics and Astronautics, 2012, 38(1): 69-74. (in Chinese)

激光冲击强化提高主动连杆振动疲劳性能

基金项目: 国防预研基金资助项目(5132701)
详细信息
    作者简介:

    李启鹏(1982-),男,山东德州人,博士生,dapeng2506@126.com.

  • 中图分类号: V 216.3

LSP to improve vibration fatigue performance of deflation valve lever

  • 摘要: 针对某型发动机放气活门主动连杆转接R处的疲劳断裂问题,进行了主动连杆激光冲击强化工艺研究;完成了原型件和激光冲击强化、喷丸及加大R3种处理工艺后主动连杆振动疲劳对比试验.结果表明,在317MPa的应力水平下,激光冲击强化、喷丸和加大R后主动连杆疲劳寿命分别为原型件的5.24倍、3.89倍及1.36倍;与其它2种工艺相比,激光冲击强化具有强化效果好、工艺稳定性高、易于实现等优点,是截至目前减少主动连杆疲劳断裂故障的最佳处理工艺.主动连杆激光冲击强化后表面粗糙度较小,产生深度约1.4mm的高数值残余压应力层,表层晶粒细化至纳米晶并伴随高密度位错.三者共同作用可以有效缓解转接R处的应力集中,抑制疲劳裂纹在转接R处的萌生和扩展,是主动连杆振动疲劳寿命提高的主要原因.

     

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出版历程
  • 收稿日期:  2010-09-15
  • 网络出版日期:  2012-01-30

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