613 アルミニウム鋳造品の表面改質(OS コーティング・溶射)

概要

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To reduce the defects of aluminum cast, several fusion processes including welding, laser and plasma were used. However, these fusion processes suffered from secondary defects as porosity and as cracks in the surface modified zone. This paper describes a novel surface modification process using friction phenomenon called friction thermomechanical process (hereafter referred as FTMP). In this process, a non-consumable rod is forced to contact with the substrate while rotating. The friction heat, generated at the interface between the rod and substrate, makes substrate metal plasticized. The coarse cast microstructures on the substrate surface have been continuously refined due to dynamic recrystallization. As a result, surface modification can be performed by FTMP, where the zone within 2 mm depth from surface can be treated with hardness increment and refined microstructures where cast defects eliminated.
一般社団法人日本機械学会の論文
2001-11-02