2021 Volume 21 Issue 3 Pages 240-246
A rapid heating test was performed using an electric furnace to evaluate the exothermic behavior of riser sleeve materials for casting in accordance with the real casting process. Rapid heating was performed by quickly inserting the riser sleeve sample into a muffle furnace at holding temperatures of 200, 400, 600, 800, and 1000 oC. The sizes of the samples were 10 mm × 10 mm × 18 mm, 20 mm × 20 mm × 18 mm and 30 mm × 30 mm × 18 mm. At a furnace temperature of 1000 oC, when the temperature of the sample was 350 oC, the resin in the sample oxidized. When the temperature of the sample was 900 oC, aluminum oxidized. Moreover, when the temperature was over 900 oC, thermite reaction occurred. The chain exothermic reaction occurred when the temperature of the riser sleeve sample reached over 1372 oC. and the efficient exothermic reaction occurred in the riser sleeve sample for casting.
