发动机气缸套的外表面,沿着连杆摆动方向两侧出现的蜂窝状孔群即为“穴蚀”。发动机工作时,缸套受到振动,使外壁冷却水附层产生局部的高压、高真空,冷却水蒸发形成小真空泡和气泡附着在缸套外壁。有些气泡受振动后会挤入气缸外壁的微观小孔或沟槽中,气泡破裂时会产生较强的压力波,不断冲击气缸外壁,使金属表面产生疲劳破坏,从而出现“穴蚀”。预防或减小穴蚀的破坏作用有几种方 The outer surface of the engine cylinder liner, along the direction of the connecting rod swing honeycomb holes on both sides of the group that is “cavitation.” Engine work, the cylinder liner is subject to vibration, so that the outer wall of the cooling water attached to produce local high pressure, high vacuum, cooling water evaporation to form a small vacuum bubble and bubble attached to the outer wall of the cylinder. Some bubbles will be squeezed into the micro-holes or grooves on the outer wall of the cylinder after being vibrated. When the bubble ruptures, strong pressure waves will be generated and the outer wall of the cylinder will be continuously impacted to cause fatigue damage on the metal surface, resulting in “cavitation”. There are several ways to prevent or minimize cavitation damage