抄録
From cutting chips of 6061 aluminum alloy, recycled materials' plates were fabricated by extrusion and rolling. Three kinds of cutting chips, which were dry-cutting chips without cutting oil, wet-cutting chips with cutting oil and clean chips obtained by washing of the wet-cutting chips, were used for the recycling process. Moreover, non-recycled materials' plates which processed by the same extrusion and rolling using virgin materials of the same alloy as the case of the recycled materials were prepared for comparison. These four kinds of plates were characterized by carrying out ultimate analysis by fluorescent X-ray spectrometer and infrared absorption spectrometer, optical microscopic and SEM observation, tensile test, and corrosion test. Consequently, a significant difference in structures, tensile properties, and corrosion resistance was not recognized among three kinds of recycled materials, it became clear that cutting oil and detergent hardly influence the characteristics. Moreover, it was found that recycled materials had smaller crystal grain than that of non-recycled materials, and excelled in both strength and corrosion resistance. The conclusion that recycling of the cutting chips by extrusion and rolling was very promising in 6061 aluminum alloys was obtained.
