3D-printing metal powder material preparation method capable of reducing hollow powder

• Main Authors: LIANG TINGYU, DENG BIN, YUE WEI, XUE GAOJIAN, JIANG YONG, SHENG HONGCHAO, YANG HAIFENG
• Format: Patent
• Language: Chinese; English
• Published: 31.05.2017
• Subjects: ADDITIVE MANUFACTURING TECHNOLOGY; ADDITIVE MANUFACTURING, i.e. MANUFACTURING OFTHREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVEAGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING,STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING; CASTING; MAKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; PERFORMING OPERATIONS; POWDER METALLURGY; TRANSPORTING; WORKING METALLIC POWDER

The invention discloses a 3D-printing metal powder material preparation method capable of reducing hollow powder. The 3D-printing metal powder material preparation method includes A, melting stainless steel or aluminum alloy under protection of micro-positive pressure nitrogen into stainless steel or aluminum alloy liquid; B, taking nitrogen as an atomizing gas, controlling the atomizing pressure as 1.5-2MPa when the aluminum alloy serves as a raw material, controlling the atomizing pressure as 3-4MPa when the stainless steel serves as the raw material, and atomizing the melted stainless steel or aluminum alloy liquid to crush and cool the liquid into spherical or near-spherical stainless steel or aluminum alloy particles; C, collecting the spherical or near-spherical particles obtained in the step B, and treating the spherical or near-spherical particles to obtain 3D-printing metal powder. By the 3D-printing metal powder material preparation method, quantity of the hollow powder is reduced greatly, and 3D pr