采用MIG堆焊方法在30CrMnSi活塞上堆焊铜合金来代替导向环,通过理论分析、接头宏观检验及油缸试验等方法,得到了合理的工艺参数及工艺流程。采用该工艺参数及工艺流程,成功解决了堆焊铜导向环划伤缸筒的问题,得到一种在特殊结构活塞上功能相当于标准导向环的焊层。 The MIG surfacing method was used to build the 30CrMnSi piston instead of the guide ring by copper alloy surfacing. The reasonable technological parameters and technological process were obtained through theoretical analysis, macroscopic test and cylinder test. By using the process parameters and the process flow, the problem of scratching the cylinder barrel by the copper guiding ring of the surfacing welding is successfully solved, and a welding layer with the function equivalent to a standard guiding ring on a special structure piston is obtained.