灰铸铁汽缸体强度低、塑性差,使用时易发生断裂损坏。为使汽缸体复生,需进行焊补。但焊后,接头处易产生白口组织、切削性能差、并有气孔和裂纹。由于汽缸体结构较复杂,壁薄且不均匀(2～3毫米),更容易产生裂纹。针对汽缸体损坏情况和缺陷 Gray cast iron cylinder body strength is low, poor plasticity, easy to use when the fracture damage. To make the regeneration of the cylinder block, welding repair is required. However, after welding, joints are easy to produce white tissue, poor cutting performance, and porosity and cracks. Due to the complicated structure of the cylinder block, thin and uneven wall (2-3 mm), cracks are more likely to occur. For cylinder damage and defects