Pure copper rods were additively fabricated by using a multibeam type laser metal deposition (LMD) device equipped with two blue diode lasers, and the influence of them on the rods was investigated. It is unknown how the rod changes with respect to the process parameters such as the laser power and the powder feeding rate. In this study, the laser power and the powder feeding rate were changed to form a pure copper rod in the LMD method, and the influence of them on the cross-sectional area of the rod was investigated. Moreover, the electrical resistance value of the rod was measured, and the influence of the laser power on the electrical resistivity was investigated. In addition, the elemental analysis of the cross section was performed by an electron probe microanalyzer, and the influence of the laser power was investigated. As a result, the cross-sectional area of the rod is slightly dependent on the powder feeding rate, and even if the powder feeding rate is increased, the cross-sectional area is slightly increased, but when the laser power is increased, the cross-sectional area is significantly increased. Moreover, when the laser power was increased, the electrical resistivity increased. The elemental analysis revealed that the surface of the rod might be oxidized, which suggested that it affected the electrical resistivity.

中文翻译：

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蓝二极管激光器的多束激光金属沉积法形成纯铜棒

使用装有两个蓝光二极管激光器的多光束型激光金属沉积（LMD）装置，添加纯铜棒，并研究了它们对棒的影响。未知棒如何相对于诸如激光功率和粉末进料速率的工艺参数变化。在这项研究中，通过LMD方法改变激光功率和送粉速度以形成纯铜棒，并研究了它们对棒截面积的影响。此外，测量棒的电阻值，并研究激光功率对电阻率的影响。另外，通过电子探针显微分析仪进行横截面的元素分析，并研究了激光功率的影响。因此，杆的截面积在一定程度上取决于粉末的进给速度，即使增加粉末的进给速度，其截面积也略有增加，但是当激光功率增加时，其截面积为显着提高。此外，当增加激光功率时，电阻率增加。元素分析表明，棒的表面可能被氧化，这表明它影响了电阻率。