铁路新造货车和在用货车(D、E轴型)几乎全部采用弓型制动梁,这不仅使制造工艺简单化了,而且还减轻了车辆配件的重量,给车辆检修带来一定的方便。但是,经过长期使用我们发现弓型制动梁闸瓦托根部断裂和裂纹开焊现象较突出,尤其在长大坡道运行的货物列车最为明显。以我分局伊图里河列检为例,其位于哈达岭下,岭上最大坡度为26‰,从岭顶到岭下列检,整个就是 The use of bow-type brake beams for almost all of the new and used trucks (D, E-axis) makes the manufacturing process not only simple, but also reduces the weight of the vehicle components and brings some convenience to vehicle maintenance. However, after long-term use, we find that the bow-type brak bar brake shoe root and the crack welds are more prominent, especially the cargo trains running on the uphill ramp are the most obvious. For example, it is located in the Ituri River of our sub-station. It is located under the Hadala Ridge with a maximum gradient of 26 ‰. From the top of the ridge to the next check, the whole is