Marine shafting is made from 35# bar steel. There is high macro residual stress in the 35 bar steel. During machining, the macro residual stress releases and thus causes considerable deformation of the marine shafting. The vibratory stress relief is introduced to marine shafting. The vibratory stress relief of marine shafting was carried out. The mechanical properties of the marine shafting were measured before and after vibration. Six points vibratory stresses were measured. The macro residual stress was measured before and after vibration. The macro residual stress decreased notably. The mechanical properties changed slightly. The vibratory wave is standing wave. The vibratory stress relief is valid for macro residual stress relieving of the marine shafting. The mechanism of the macro residual stress relieving by vibration on the marine shafting is discussed. The "double-dynamic mechanism" is introduced to explain the course of macro residual stress relieving in the test.
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