为了研究不同的扫描策略对激光沉积镍基合金基体的影响，使用ABAQUS软件对4种不同扫描策略下IN718合金基体沉积IN718合金粉末过程进行了数值模拟，并在相同条件下进行了试验验证。热源验证的结果表明热源模型准确有效，数值模拟过程符合实际沉积过程；温度场、应力场、变形场分析结果表明异侧扫描相较同侧扫描、往复扫描相较单向扫描对基体的热影响较小，峰值温度更低，进而产生的残余应力更低，且可以有效减小基体的变形程度；试验验证结果表明数值模拟过程准确有效。最终得出结论：采取异侧往复扫描方式可以有效降低残余应力值，并减小变形。

In order to study the effect of different scanning strategies on laser deposition of nickel-based alloy matrix, the process of deposition of IN718 alloy powder on IN718 alloy matrix under four different scanning strategies was numerically simulated by ABAQUS software, and tested under the same conditions. The heat source verification results show that the heat source model is accurate and effective, and the numerical simulation process accords with the actual deposition process. The analysis results of temperature field, stress field and deformation field show that the thermal influence of different side scanning is less than that of same side scanning and reciprocating scanning is lower than that of unidirectional scanning, and the peak temperature is lower, thus the residual stress is lower, and the deformation degree of the matrix can be effectively reduced. The experimental results show that the numerical simulation process is accurate and effective. It is concluded that the residual stress value and deformation can be reduced effectively by using the reciprocating scanning method on different sides.