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Vol.43, No.2, 103 ~ 108, 2005
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| Title |
| Optimal Casting Process Design of High-Si Corrosion-resistant Irons by Using Taguchi Method |
| 신제식 Je Sik Shin , 이상목 Sang Mok Lee , 문병문 Byung Moon Moon , 김정철 Jung Chul Kim , 한동운 Dong Woon Han , 백승한 Seung Han Baik |
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| Abstract |
| In this study, Taguchi method, one of the design tools of experiments, was applied to optimize casting process parameters of the high silicon corrosion-resistant iron. Three casting process parameters such as melting temperature, rare earth metal (mischmetal) addition, and pouring temperature were chosen. Using SN (signal-to-noise) ratio calculated from ultimate tensile strength of each experimental casting run, the relationship between the casting parameters and mechanical properties was statistically evaluated. The casting condition of a melting temperature of 1,650℃, 0.2% rare earth metal addition, and a pouring temperature of 1,350℃ led to an excellent ultimate tensile strength above 11 kgf/mm², which is beyond the industrial criterion. The effects of the casting parameters on mechanical properties and corrosion resistance were further confirmed by combined analysis of fractography, hydrogen content determination, microscopic test, and acid resistance test. (Received August 23, 2004) |
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| Key Words |
| High silicon corrosion-resistant iron, Casting process parameter, Tensile strength, Taguchi method, Design of experiment, Rare earth metal |
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