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 standard different parameters in the laser direct metal deposition (LDMD) formation technology, the experiment of LDMD formation of Inconel 625 spherical alloy powders and the nondimensionalization of the formation parameters are conducted, and the working diagram with the contact angle as an evaluation parameter of geometric morphology is obtained. The relationship between the geometric morphology of single track deposited layer and the process parameters is discussed. The results show that, when the ratio of characteristic energy is between 0.5 and 0.7, the deposited layer shows a relatively smooth oval because of incomplete melting of powder and less energy redundancy. Feeding rate is the primary factor to control the height of deposited layers. When the feeding rate is constant, the laser power has a great influence on the depth of molten pools.