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成果報告書詳細
管理番号20180000000113
タイトル*平成29年度中間年報 SIP(戦略的イノベーション創造プログラム)/革新的設計生産技術 高付加価値設計・製造を実現するレーザーコーティング技術の研究開発
公開日2018/6/26
報告書年度2017 - 2017
委託先名国立研究開発法人日本原子力研究開発機構 国立大学法人大阪大学
プロジェクト番号P14030
部署名IoT推進部
和文要約
英文要約Title:SIP(Cross-Ministerial Strategic Innovation Promotion Program) / Innovative Design/Manufacturing Technologies Development of laser coating methods for realization of high value-added design and manufacturing (FY2014-FY2018) FY2017 Annual Report

1-(1) Computational science numerical simulations for melting and solidifying phenomena of various metals by a laser irradiation: A general-purpose three-dimensional thermohydraulics numerical simulation code SPLICE was developed at JAEA (Japan Atomic Energy Agency) and designed to deal with gas-liquid-solid consolidated incompressible viscous flows with a phase change process in various laser applications, such as coating etc. The SPLICE code was applied to the laser coating processes with/without the welded pond. The result obtained in this numerical simulation is very encouraging in the sense that the SPLICE code would be used as one of the efficient tools for simulating the complex phenomena related to the laser coating processes.
1-(2) Elucidation of a laser coating phenomena: In order to achieve high quality coating, operand observation of melt solidification phenomenon in metal under vacuum using synchrotron radiation imaging technique was performed at BL22XU in SPring-8. In FY2017, we observed its behavior with respect to a metal ball of 60 micrometre in diameter which is close to the size of the powder finally used for the coating. By irradiating in a vacuum, it was confirmed that the copper ball was not oxidized and it was melted and spread in the substrate with a very high quality state. In addition, it was confirmed that there was no difference in melting phenomenon depending on the size, because it was observed that the copper ball gradually became small with spreading over the substrate.
1-(3) Development of high-quality laser coating technology for processing resistant materials:Osaka University and Industrial Research Institute of Ishikawa improved stabilization of the powder feeder and ON/OFF controllability of the oscillator installed in the multi-beam type direct injection laser coating apparatus. In addition, WC-Co film was able to be coated without voids. Stellite 6 and many kind of Fe based powders such as SPM23, SPM30, SPM60, SPC5, FeCrB were offered in this year from Sanyo Special Steel Co. Furukawa Electric Co. and Osaka University designed a configuration of a laser control system consist of a CW fiber laser, a pulsed fiber laser and an electrical pulse generator with tunable delay. Those lasers are control via the electrical pulse generator.
2 Research and development of molten pool type laser coating technology: In the goal of 2017, laser coating technique was evaluated with corrosion resistance and abrasion resistance to compare with a conventional technology. The results confirmed that corrosion resistant and wear resistant of the laser coating sample were improved.
3 Research and development of non-molten pool type laser coating process: Three dimensional CAD/CAM system was developed for non-molten pool type laser coating machine. Using this system, the defective part of the product was measured with a three-dimensional digitizer, converted to 3D-CAD data, a path was created in the same CAM system, and a repair sample was demonstrated. Furthermore, laser coating applications to fine mold dies and jigs was tried, and their practicality were showed. It was made cleared that a laser coating film can be deposited on a copper shaft using a multi-color laser coating apparatus.
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