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为了对激光直接金属沉积成形技术中不同参数进行规范,对Inconel 625球形合金粉末进行了激光直接金属沉积成形试验,对成形参数进行了无量纲化,得到了以接触角为几何形貌评价参数的加工图,并对工艺参数与单道沉积层几何形貌间的关系进行了分析讨论。结果表明,特征能量比为0.5~0.7时,粉末完全熔化且不造成能量剩余,沉积层呈现平滑的椭圆形;送粉速率是控制沉积层高度的首要因素,当送粉速率恒定时,激光功率对熔池深度影响较大。
In order to regulate different parameters of laser direct metal deposition forming technology, laser direct metal deposition forming test was carried out on Inconel 625 spherical alloy powder, the forming parameters were dimensionless, and the contact angle as the evaluation parameter of geometric shape was obtained Processing diagram, and the relationship between the process parameters and the geometry of single sedimentary layer were analyzed and discussed. The results show that when the specific energy-energy ratio is 0.5-0.7, the powder completely melts without any residual energy, and the deposited layer shows a smooth oval shape. The powder feeding rate is the primary factor controlling the height of the sedimentary layer. When the powder feeding rate is constant, the laser power Great impact on the depth of the pool.