引入回归正交设计(ORD)方法,利用逐步回归模型得到了激光快速成形(LRF)工艺参数以及它们之间的交互作用对沉积层尺寸影响显著的因素。其中,对沉积层高度影响显著的因素是送粉率和扫描速度,对单道沉积宽度影响显著的因素是光斑直径、扫描速度、激光功率与光斑直径的交互作用。同时也得到了主要影响因素与沉积层尺寸的定量关系,并验证了其准确性。 By introducing the regression orthogonal design (ORD) method, the factor of laser rapid prototyping (LRF) process parameters and the interaction between them have significant effect on the deposit size. Among them, the significant factor influencing the height of the sedimentary layer is the powder feeding rate and scanning speed, and the significant influence on the deposition width of the single channel is the interaction of spot diameter, scanning speed, laser power and spot diameter. At the same time, the quantitative relationship between the main influential factors and the sedimentary layer size was also obtained, and its accuracy was verified.