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고크롬 백주철재 소실모형 주조시 표면 결함 발생에 미치는 모형밀도 및 감압의 영향
이규희 ( Kue Hee Lee ),유국종 ( Kook Jong Yoo ),백응률 ( Eung Ryul Baek ),최현진 ( Hyun Jin Choi ),이경환 ( Kyung Whoan Lee ) 한국주조공학회 2002 한국주조공학회지 Vol.22 No.6
N/A The effect of mold density and evacuation on surface defect of high chromium cast iron upon EPC process was investigated. Under evacuation of 0.1~0.3 atm, surface defects were carbon defect, burn on and misrun. Carbon defect was augmented by increasing mold density from 0.011 g/㎤ to 0.03 g/㎤ under evacuation of 0.1~0.3 atm, but carbon defect was decreased by increasing evacuation from 0.1 to 0.3 atm. Burn-on wasn`t found under evacuation of 0.1 atm regardless of mold density, but burn-on was augmented by increasing evacuation from 0.2 to 0.3 atm and decreased by reducing mold density. Misrun was only found under 0.1 atm evacuation and 0.011 g/㎤ mold density.