pISSN : 1598-706X / eISSN : 2288-8381
한국주조공학회지 (22권6호 309-314)
The Effect of Mold Density and Evacuation on Surface Defect in Lost Form Casting of High Chromium Cast Irons
고크롬 백주철재 소실모형 주조시 표면 결함 발생에 미치는 모형밀도 및 감압의 영향
Kue-Hee Lee, Kook-Jong Yoo, Eung-Ryul Baek, Hyun-Jin Choi*, Kyung-Whoan Lee*
yeungnam University, *Korea Institute of Industrial Technology
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/cm3 to 0.03 g/cmi‘ under evacuation of 0.1 ~0.3 atm, but carbon defect was decreased by increasing evacuation from 0.1 to 0.3 atm. Bum-on wasn't found under evacuation of 0.1 atm regardless of mold density, but bum-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/cm3 mold density.
EPC process, high chromium cast Iron, surface defect, mold density, evaluation, carbon defect, Bum-on, Misrun
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