介绍了激光增材制造氧化铝增强镍基合金成型件的制备方法。重点介绍多层镍基合金的熔覆成型过程工艺, 并对增材制造的多层氧化铝增强镍基合金的组织与性能特点做出分析, 同时使用氩气保护气避免成型过程中氧化问题。实验选取参数：功率1 500 W; 离焦量450 mm; 送粉速率8 g/min; 单道次向上升移量1 mm。分析结果表明：成型后的沉积层高度范围在6±0.05 mm。试样进行微观扫描分析后能看到气孔数量, 裂纹都极少且组织均匀。分析主要性能参数有：平均抗拉强度878.51 MP, 是普通镍基合金的1.5倍; 平均延伸率接近10%。实验同时对激光增材制造的氧化铝增强镍基合金试样的组织形貌与性能之间的关系进行了深入的研究分析。结果表明, 影响试样拉升性能主要因素有晶体的类型、尺寸以及内部结构力的方向。三者之间有着复杂的正曲线关系, 共同影响着试样的物理性能。

Introduces the preparation method of alumina reinforced Ni-based alloy forming parts by laser additive manufacturing. Focuses on the cladding of Ni-based alloy in multilayer process, and the analysis of the microstructure and properties of the multilayer Alumina reinforced Ni-based alloy by additive manufacturing, while using argon gas to avoid the oxidation problem. The experimental selection parameters: power 1 500 W; defocusing 450 mm; powder feeding rate 8 g/min; single channel upward to 1 mm. The results show that the height of the deposited layer after forming is in the range of 6 mm(±0.05 mm). After microscopic scanning analysis of the sample can see the number of pores, cracks are very small and the organization uniform. Analysis of the main performance parameters as follows: the average tensile strength is 878.51 MP, which is 1.5 times the ordinary Ni-based alloy; average elongation is nearly 10%. At the same time, the relationship between the microstructure and properties of the Alumina reinforced Ni-based alloy sample made by laser additive manufacturing was studied. The results show that the main factors affecting the performance of the sample are the type of crystal, the size and the direction of the internal structure force. There is a complex relationship between the three positive relationship, which affect the physical properties of the sample commonly.