为合理选择一种最适合盾构刀具耐磨处理的堆焊材料，根据盾构刀具的磨损原理，选取4种耐磨堆焊材料，并对其焊接方法的工艺性能、高温钎焊后堆焊层的硬度、抗脱落性和耐磨性进行试验对比。根据试验结果综合比较发现，KB600耐磨焊丝在950 ℃高温钎焊后硬度大于55 HRC，具有优良的抗脱落性能和耐磨性，是所选材料中最适合盾构刀具堆焊的耐磨材料。

Four types of wearingresistant wires are tested in terms of the welding technical characteristics, the hardness of the welding layers after brazing, the antiloosening capacity and the wearingresistant capacity. The testing results show that the hardness of KB600 wearingresistant welding wires after 950 ℃ brazing is higher than that of 55HRC wearingresistant wires and that KB600 wearingresistant welding wires, which have high antiloosening capacity and good wearingresistant capacity, are the most suitable wearingresistant submerged arc welding wires for cutting tools of shield machines.