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Vol.47, No.3, 169 ~ 175, 2009
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| Title |
| Effect of Subzero Treatment on the Damping Capacity of Austempered Ductile Cast Iron |
| 성장현 Jang Hyun Sung , 강창룡 Chang Yong Kang , 이해우 Hae Woo Lee , 김윤규 Yun Kyu Kim , 조덕호 Duck Ho Jo , 한현성 Hyun Sung Han |
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| Abstract |
| The effect of sub zero treatment on the damping capacity in austempered ductile cast iron investigated. Austenite transformed in to martensite by subzero treatment, and with the decrease of subzero treatment temperature, volume fraction of martensite increased. Damping capacity of austempered ductile cast iron was highly increased by subzero treatment, with the decrease of subzero treatment temperature, damping capacity was slowly increased. With the decrease of subzero treatment time, damping capacity was rapidly increased to 30 min. and then slowly increased. With the increase of volume fraction of martensite, damping capacity rapidly increasing to 5% and then slowly increased. |
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| Key Words |
| subzero treatment, damping capacity, retained austenite, austempered ductile cast iron, ε martensite |
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