1概述气缸体是发动机各个机构和系统的装配基础,其结构和形状较复杂,各装配部件之间精度很高。汽车在行驶中,由于各种原因,如缺油、油质变差及负荷过大等,会发生发动机烧轴瓦,拉伤曲轴及曲轴轴承孔等事故,使发动机不能工作。气缸体的材质一般为优质灰口铸铁,其焊接性能较差,传统曲轴轴承孔拉伤后的修复方法一般有手工电弧焊、氩 1 Overview Cylinder block is the basis for the assembly of the various agencies and systems of the engine, the structure and shape is more complex, the accuracy of the assembly of parts is high. When a car is driving, due to various reasons, such as lack of oil, deteriorating oil quality and excessive load, accidents such as burning of the bearing pad, crankshaft crankshaft, crankshaft bearing hole, etc., can occur, rendering the engine inoperable. Cylinder body material is generally high quality gray cast iron, its welding performance is poor, traditional crankshaft bearing hole after the repair methods are generally manual arc welding, argon