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YAN Dongfang, SHI Chuanwei, WANG Xibao, et al. Current situatio n an d prospect of pure tungsten fabricated by additive manufacturing. [J]. 51(8):93-98(2021)
Tungsten has been widely used in aerospace,medical equipment,weapons and other cutting-edge fields because of its high melting point,high thermal conductivity,low sputtering and other advantages. However,high melting point and low temperature brittleness make tungsten unsui-table for traditional casting and machining. In particular,traditional sintering technology has the disadvantages of low density and low strength. Additive manufacturing technology can not only avoid low temperature brittle fracture in tungsten processing,but also meet the requirements of preparing complex structure. Therefore,additive manufacturing techno-logy will become one of the effective methods for manufac-turing pure tungsten. In this paper,the principle,develop-ment status and existing problems of two additive manufac-turing technologies（selective laser cladding,electron beam selective melting） for manufacturing pure tungsten are sum-marized. This paper analyzes and discusses the great development potential and good application prospect of additive manufacturing technology in pure tungsten manufac-turing,including the monitoring and control of thermal cycle in additive process,the diversification of material morphology,and the integration of structure optimization and advanced manufacturing combined with topology optimization technology.
selective laser meltingselective electron beam meltingspheroidizationfemtosecond laserdensity