TY - CONF
T1 - Improvement of wear resistance of stainless steel by laser-induced local surface treatment
AU - Ezura, Atsushi
AU - Yoshimine, Hikaru
AU - Ohkawa, Koki
AU - Katahira, Kazutoshi
AU - Komotori, Jun
N1 - Funding Information:
We wish to thank Dr. T. Matsumoto from Industrial Technology Center of Tochigi Prefecture, for his advice on the analyses of the XRD. The part of this work was supported by JSPS KAKENHI Grant Number 15H03547 and the Amada Foundation.
PY - 2015/10/18
Y1 - 2015/10/18
N2 - To improve the wear resistance of small machine parts such as a microscale gears, we developed a new surface treatment process; a laser-induced local surface treatment. Disk-shaped austenitic stainless steel (SUS316L) objects were soaked in Al(NO3)3 solution and then irradiated by a nano-pulse fiber laser beam. Treated surfaces were observed with a scanning electron microscopy and analyzed with an energy dispersive X-ray spectrometer. The effect of the defocus amount, tribology behavior and wear resistance on the characteristics of the treated surface were examined. The surface roughness of the treated specimens with the defocus range from -1 to -2 mm was lower than that of the treated specimen without defocus. The thickness of the treated layer decreased when the defocus amount was increased within the abovementioned range of values. However, when treatment was performed with a defocus amount of -3 mm, no noticeable change was observed on the treated surface this was because of the difference in laser-energy density. The friction coefficient of the laser-treated specimen with the defocus level of -1 mm was much lower than that of the untreated specimen. This implies that the wear resistance of austenitic stainless steel can be improved with the developed surface treatment method.
AB - To improve the wear resistance of small machine parts such as a microscale gears, we developed a new surface treatment process; a laser-induced local surface treatment. Disk-shaped austenitic stainless steel (SUS316L) objects were soaked in Al(NO3)3 solution and then irradiated by a nano-pulse fiber laser beam. Treated surfaces were observed with a scanning electron microscopy and analyzed with an energy dispersive X-ray spectrometer. The effect of the defocus amount, tribology behavior and wear resistance on the characteristics of the treated surface were examined. The surface roughness of the treated specimens with the defocus range from -1 to -2 mm was lower than that of the treated specimen without defocus. The thickness of the treated layer decreased when the defocus amount was increased within the abovementioned range of values. However, when treatment was performed with a defocus amount of -3 mm, no noticeable change was observed on the treated surface this was because of the difference in laser-energy density. The friction coefficient of the laser-treated specimen with the defocus level of -1 mm was much lower than that of the untreated specimen. This implies that the wear resistance of austenitic stainless steel can be improved with the developed surface treatment method.
KW - Alloy layer
KW - Austenitic stainless steel
KW - Laser processing
KW - Local surface treatment
KW - Wear resistance
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M3 - Paper
AN - SCOPUS:84974593877
T2 - 8th International Conference on Leading Edge Manufacturing in 21st Century, LEM 2015
Y2 - 18 October 2015 through 22 October 2015
ER -