DLC被覆処理を施したステンレス鋼の疲労特性

概要

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This study was conducted to investigate the effect of diamond-like carbon (DLC) coating on the fatigue properties of stainless steel SUS 304. For the DLC coating, unbalanced magnetron sputtering (UBMS) method was used. The generated surface layer of about 2μm thickness was composed with the DLC layer possessing a high hardness and an intermediate layer to improve the adhesion to the substrate. The DLC coating at a relatively low temperature had no influence to the microstructure so that the mechanical properties of the stainless steel were unchanged. The results of plane-bending fatigue test showed that the DLC coating improved the fatigue strength by 18%. From the detailed observation on the fracture surface, it was suggested that the improvement of the fatigue strength was made through the suppression of fatigue crack initiation from the surface due to the existence of the surface layer with a high adhesion and strength.
一般社団法人日本機械学会の論文
2006-10-25