研制成功了一种新型铜基自熔性合金粉末，在高强度钢基体上采用等离子喷焊工艺制备焊层。通过研究发现，在一定的工艺规范内焊层不开裂，且也基本不会形成晶界渗透裂纹，在堆焊三层的越厚焊层中也未发现层间缺陷。经拉伸和剪切试验表明，焊层具有较高的机械性能，应用于大直径密封面上，获得了良好的应用效果。 Developed a new type of copper-based self-fluxing alloy powder, high strength steel substrate using plasma spray welding process. Through the research, it is found that the weld layer does not crack in a certain process specification, and also does not form the grain boundary penetration crack, and no interlayer defect is found in the thicker weld layer of the three layers of build-up welding. The tensile and shear tests show that the weld layer has high mechanical properties, applied to large diameter sealing surface, and obtained a good application effect.