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AECC Aviation Power Wins Patent for “Concave-Structure SLM Powder Spreading and Doctor Blading Device”, with Patent Grants Up 621% Year-on-Year

2026-07-18 · Impact score: 27

AECC Aviation Power Co., Ltd. (stock code: 600893) received a patent on July 17, 2026, titled “A Powder Spreading and Doctor Blading Device and Method for Laser Selective Melting (SLM) of Concave Structures.” The invention is in the additive manufacturing field and includes a powder spreading mechanism and a doctor blade system: the spreading mechanism uses a straight-groove roller to quantitatively extract powder from a storage hopper and transfer it to an internal powder falling cavity, with the roller rotating in sync with the SLM machine’s motion trajectory; the doctor blade works in tandem with the spreading mechanism for synchronized powder deposition and leveling. This technology is suited for local powder bed coating and laser selective melting of concave geometric features, enabling SLM formation at specific local areas without compromising the original part structure. As of this year, the company has secured 101 new patent grants, a 621.43% increase year-on-year. The patent addresses the technical bottleneck of local powder coating in concave regions during SLM processes, placing higher demands on powder flowability and particle size distribution uniformity.

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航发动力获“凹形结构SLM撒粉刮粉装置”发明专利，今年专利授权同比增长621%

航发动力（600893）于2026年7月17日获得一项名为“一种凹形结构激光选区熔化的撒粉刮粉装置及方法”的发明专利授权。该发明属于增材制造技术领域，装置包括撒粉机构和刮刀装置：撒粉机构通过直纹凹槽滚子从粉末存放仓定量取粉并传送至落粉内腔，滚子与SLM设备运动轨迹同步旋转；刮刀装置配合撒粉机构进行同步撒粉和刮粉。该技术适用于凹形特征结构局部铺粉和激光选区成形，在不破坏零件原有结构的前提下进行局部位置的SLM成形。今年以来航发动力新获得专利授权101个，较去年同期增加621.43%。该专利解决了SLM工艺中凹形结构局部铺粉的技术瓶颈，对粉末流动性、粒度分布均匀性提出了更高要求。

🧪 Related Material Grades

Metal powder grades mentioned in this article — specs, live prices & verified suppliers

316L Stainless Steel Powder

15-45 µm / 15-53 µm

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17-4PH Stainless Steel Powder

15-45 µm / 15-53 µm

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Ti-6Al-4V (Grade 5) Titanium Powder

15-45 µm / 15-53 µm / 45-105 µm

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AlSi10Mg Aluminum Alloy Powder

15-45 µm / 20-63 µm

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Inconel 718 Nickel Superalloy Powder

15-45 µm / 15-53 µm

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18Ni300 Maraging Steel Powder

15-53 µm

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