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用国产10吨“红山”高频疲劳试验机及附加装置组成的微动磨损设备研究了Ti-6Al-4V和Ti-10V-2Fe-3Al合金的微动磨损特点及常温与高温下的微动疲劳性质,探讨了微动损伤机制及初步的防护工艺。试验结果表明,钛合金对微动损伤极为敏感,疲劳寿命大幅度下降,由表层交变切应力作用而导致的疲劳脱层是主要损伤机制。若采用喷丸处理,疲劳强度明显改善,但单纯的喷丸处理对改善微动磨损效果不佳。
The fretting wear characteristics of Ti-6Al-4V and Ti-10V-2Fe-3Al alloy at room temperature and high temperature were studied by using the fretting wear equipment consisting of 10 tons “Hongshan” Dynamic fatigue nature, discussed the fretting damage mechanism and the initial protection process. The experimental results show that the titanium alloy is very sensitive to fretting damage and the fatigue life is greatly reduced. Fatigue delamination caused by the alternating shear stress on the surface is the main damage mechanism. If the shot peening treatment, fatigue strength improved significantly, but the simple shot peening treatment to improve the fretting effect is not good.