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振动时效是继热时效而后发展起来的一种新的时效方法,它是在周期性外力作用下促使工件振动,达到调整、均化残余应力、稳定构件加工尺寸和精度等目的的一种工艺。振动时效由于具有设备简单、处理时间短、节省能源、稳定工件尺寸和消除残余应力作用显著等特点,近年来了得到了较普遍的应用。目前振动时效在国内应用已有20余年,但其应用主要在降低高残余应力,调整、均化残余应力,稳定构件加工尺寸等方面。根据近期研究,发现振动时效对提高焊件疲劳寿命、抗应力腐蚀性能以及金属材料的冲击功也有明显效果。全面综述了振动时效的效果,并对其机理进行了研究。振动时效的过程,实质上是金属材料内部晶体位错运行、增殖、塞积和缠结的过程
Vibration aging is a new aging method developed after thermal aging. It is a kind of technology which can promote the vibration of the workpiece under the action of periodic external force, and achieve the purpose of adjusting, averaging the residual stress and stabilizing the processing dimension and precision of the component. Vibration aging has been widely used in recent years due to its characteristics of simple equipment, short processing time, energy saving, stable workpiece size and significant effect of eliminating residual stress. At present, vibration aging has been applied in China for more than 20 years, but its applications are mainly to reduce high residual stress, adjust residual stress and stabilize the processing dimension of components. According to recent studies, it has been found that vibration aging has obvious effect on improving the fatigue life, stress corrosion resistance and impact energy of metal materials. A comprehensive review of the effect of vibration aging, and its mechanism were studied. Vibration aging process, in essence, is the dislocation of the crystal material within the metal run, proliferation, Cypriot accumulation and entanglement process