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利用激光堆焊方法可以在基体表面获得一层高厚度、高性能的合金堆焊层。通过在45#钢上进行激光堆焊工艺试验,就激光自动送丝堆焊的基本工艺过程进行研究,比较不同堆焊条件下的组织性能,探索激光堆焊的特性。与氩弧堆焊相比,激光堆焊过渡区狭小,激光堆焊层显微组织随比能量Es增加而逐渐变粗大;堆焊层组织明显细化,硬度提高70％;与高速钢相比,激光堆焊层体现出良好的抗磨性能,比高速钢的耐磨性高42.6％。
The use of laser cladding method can be obtained in the substrate surface layer of high-strength, high-performance alloy surfacing layer. Through laser cladding welding test on 45 # steel, the basic process of laser wire feeding surfacing was studied. The properties of different surfacing welding were compared to explore the characteristics of laser surfacing. Compared with argon arc welding, the transition zone of laser welding is narrow, and the microstructure of laser welding layer becomes larger with the increase of specific energy Es. The microstructure of surfacing layer is obviously refined and the hardness increases by 70%. Compared with high-speed steel The laser surfacing layer shows a good anti-wear performance, which is 42.6% higher than the wear resistance of high-speed steel.