航天领域金属3D打印技术发展方向与产业化建议

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Abstract：This paper firstly summarizes the clasification and technical characteristics of metal 3Dprinting process， analyzes the development trend of extreme lightweight，highly integrated and extremely high performance of the new generation of aerospace equipment such as missiles，rockets and space vehicles in detail，and clarifies the structural characteristics of the novel structure such as special-shaped complexity，macro-micro cros-scaleand function-structure integration. It clarifies the technical advantages of metal 3D printing in the precision controlcontrolled manufacturing of new shape structures.Then，the development and engineering application status of metal3D printing technology in aerospacefield is analyzed.Thecurrent metal 3D printing technology is gradually developing from parts-level manufacturing to system-level and whole-machine level manufacturing. Developed countries abroad have realized the whole arrow，the whole star，rocket engine and other system level or whole machine level3Dprinting，butthe domestic stillstays inthe parts-level printingtechnologyresearch stage，and there is stillabiggapwith foreigncountries intermsof technicallevelandengineeringapplications.Finall，basedon the development andapplicationstatus of metal 3D printing technology，this paper puts forward technical direction and industrialization development suggestions from the aspects of materials，process technology， equipment and production line.

Keywords： metal 3D printing technology; aerospace equipment; the novel structure; technology development directionandindustrialization

1序言

3D打印作为先进制造技术发展方向之一，其本质是数字化控制的增材制造技术。（剩余10629字）