汽缸裂纹产生原因是复杂的 ,涉及到设计、制造及运行等各方面的因素 ,但归纳起来有两种情况 :一是存在易于产生裂纹的薄弱环节 ,如铸造缺陷 ,脆性大的区域等 ;二是应力较大 ,包括铸造应力、热应力和机械应力等。在汽缸上出现裂纹后 ,在裂纹的两端将引起很大的应力集中 ,极易使 The causes of cylinder cracks are complex and involve various factors such as design, manufacture and operation. However, there are two situations to be summed up: First, there are weak links that are prone to cracking, such as casting defects and areas with large brittleness; Is the stress, including casting stress, thermal stress and mechanical stress. Cracks in the cylinder, the ends of the crack will cause a lot of stress concentration, easy to make