2023 Fiscal Year Final Research Report
Building strategy for quality assurance of built part based on understanding the phenomenon in powder bed fusion
| Project/Area Number |
21K03790
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 18020:Manufacturing and production engineering-related
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| Research Institution | Kanazawa University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
阿部 諭 金沢大学, 設計製造技術研究所, 研究協力員 (30882584)
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| Project Period (FY) |
2021-04-01 – 2024-03-31
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| Keywords | 粉末床溶融結合法 / 金属粉末 / 高速度カメラ / 温度測定 / スパッタ / ヒューム / 再利用粉末 |
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| Outline of Final Research Achievements |
Melting and solidification of metal powder around the laser-irradiated area during a laser-based powder bed fusion process was observed using a high-speed camera to establish the building strategy for the quality assurance of built part, and the influence of laser conditions, powder characteristics, and building environment on the scattering of spatter and fume was investigated. As results, the principal building conditions affecting the built part quality and the scattering of spatters and fumes were identified. In addition, the building experiment was performed based on the established building strategy, and the restraining of deformation and the improvement of mechanical properties of built part was achieved.
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| Free Research Field |
付加製造法
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| Academic Significance and Societal Importance of the Research Achievements |
付加製造法で得られた部品が社会実装されない要因の1つは，造形物の品質保証が難しく，熱源による入熱条件，使用する材料の特性，造形環境など考慮すべき造形条件因子が多いことに加え，各因子が相互に影響を及ぼすために造形現象の理解が困難なためである．本研究では，粉末床溶融結合法の溶融池周辺で生じる粉末挙動について，考え得る全ての条件因子を検討し，造形不具合の主因の1つである溶融池から飛散するスパッタやヒュームを抑制する造形戦略を構築した．これらは，造形物の品質保証を実現するための条件設定指針の確立に寄与でき，粉末床溶融結合法だけでなく，他の付加製造法で同様の造形戦略を構築することに応用できる．
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