对三种不同硬度Cr12Mo V淬硬钢的焊接件进行了显微硬度、铣削力、振动信号测试。结果表明:焊接件的显微硬度存在不均匀性,焊缝处的显微硬度最大。在焊缝处的铣削过程中,铣削力呈现梯形的变化趋势,且焊缝处的铣削力最大。在焊缝处铣削的加速度峰值增大,且容易处于铣削振动加剧状态。 Three different hardness Cr12Mo V hardened steel welding parts were microhardness, milling force, vibration signal test. The results show that the microhardness of the welded parts is inhomogeneous, and the microhardness of the weld is the largest. During the milling process at the weld, the milling force shows a trapezoidal trend, and the maximum milling force at the weld. Milling in the weld peak acceleration increases, and is easy to milling vibration state.