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公开(公告)号：US20230271255A1
公开(公告)日：2023-08-31
申请号：US18014066
申请日：2021-07-09
发明人： Pei WANG et al. , Cheng Cheh Dennis TAN , Kaixin Vivian LIN , Kwang Boon Desmond LAU , Wei Hock Gary TEH
CPC分类号： B22F10/28 , B22F1/09 , B22F9/04 , B22F9/08 , B22F10/37 , B22F10/38 , B22F2009/047 , B22F2301/052 , B22F2301/205
摘要： The present disclosure generally relates to a method of fabricating a graded metallic structure by additive manufacturing and the graded metallic structure thereof. The method comprises preparing a material powder in a supply container, the material powder is partitioned into a plurality of longitudinal volumes and comprises different metallic powders, performing an additive manufacturing process comprising supplying layers of the material powder from the supply container, displacing the layers of material powder to a fabrication platform and fusing the layers of material powder on the fabrication platform to form the graded metallic structure, wherein at least one longitudinal volume has a varying transverse cross-sectional area and at least one longitudinal volume has a varying longitudinal cross-sectional area, such that the fused metallic powders in the graded metallic structure are graded along the longitudinal and the transverse. This method is proven to be effective to make graded metal parts with composition gradients in two dimensions.
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公开(公告)号：US20240139812A1
公开(公告)日：2024-05-02
申请号：US18546397
申请日：2022-03-28
CPC分类号： B22F10/28 , B22F1/12 , B22F3/10 , B22F12/58 , C22C38/001 , C22C38/04 , C22C38/22 , C22C38/28 , B33Y10/00
摘要： The present disclosure generally relates to a method for fabricating a nitrogenous steel material (200). The method comprises preparing a material powder in a powder reservoir (120) of an additive manufacturing apparatus (100). The material powder comprises: a metal powder comprising iron; and an alloying powder comprising nitrogen. The method further comprises performing an additive manufacturing process under atmospheric pressure, the additive manufacturing process comprising: displacing layers of the material powder from the powder reservoir (120) to a build platform (130) of the additive manufacturing apparatus (100); and fusing the layers of material powder on the build platform (130) to fabricate the nitrogenous steel material (200).
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