T. Maruyama, T. Kobayashi, Kansai University, Suita, Japan; K. Akagi, Graduate School of Kansai University, Suita, Japan
A carbon steel substrate including 0.45 mass% carbon was blasted by white alumina grit (WA #30). The blasting angle to the substrate plane was changed from 30 to 90 degree. The amount of the residual grit was evaluated by the extraction of all residual grit on the blasted substrate. A mixed acid solution was used to dissolve the substrate surface, where the residual grit was removed from the surface, remaining non-dissolved. The penetration depth was evaluated by measuring of the difference between the substrate thickness before and after the extraction treatment. The residual grit amount and the penetration depth increased with increasing blasting angle. The residual grit amount was 2.0-12.0 g/m2, and the penetration depth was 0.026-0.034 mm. In case of the blasting angle increase from 30 to 90 degree, the increase ratio of the residual grit amount was 6.0, although the increase ratio of perpendicular components of impact energy by blasting was 2.0.
Summary: A carbon steel substrate was blasted by white alumina grit (WA #30). The blasting angle to the substrate plane was changed. The amount of the residual grit and the penetration depth was evaluated.
The residual grit amount and the penetration depth increased with increasing blasting angle. The residual grit amount was 2.0-12.0 g/m
2, and the penetration depth was 0.026-0.034 mm. In case of the blasting angle increase from 30 to 90 degree, the increase ratio of the residual grit amount was 6.0, although the increase ratio of perpendicular components of impact energy by blasting was 2.0.
