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采用YAG固体激光器,在固定脉冲频率和扫描速度条件下对电镀铬后的Inconel690合金管进行激光辐照处理,获得激光熔凝层,研究了不同工作电流下熔凝层的微观结构和形貌;用EDX方法研究了Cr、Ni元素在熔凝层中的扩散行为。结果表明:YAG固体激光器处理Inconel690合金管镀铬层在较高的工作电流下仍然能够获得质量优良的熔凝层,随工作电流的增大,熔凝层深度增加;在不同工作电流下,从管壁外缘至管的内部,Cr、Ni元素分布均匀,浓度梯度较小。
The YAG solid laser was used to laser polish the chrome-plated Inconel690 alloy tube under the condition of fixed pulse frequency and scanning speed to obtain the laser cladding layer. The microstructure and morphology of the fused layer under different working current were studied. The diffusion behavior of Cr and Ni in the melt layer was studied by EDX method. The results show that YAG solid laser treatment of Inconel690 alloy tube chrome plating at high operating current can still get good quality of the fused layer, with the increase of operating current, the depth of the fused layer increases; at different operating currents, from the tube The outer edge of the wall to the interior of the tube, Cr, Ni elements evenly distributed, the concentration gradient smaller.