| SGCI(spheroidal graphite cast iron), CVGCI(CV graphite cast iron) and FGCI (flake graphite cast iron) were made as cast, SGCI was rolled and the resonant frequency, damping coefficient, hardness and tensile strength were investigated. As the reduction rate of as rolled SGCI increases, the resonant frequency decreases and damping coefficient increases. As the graphite nocularity increases in as cast iron, the resonant frequency increases and damping coefficient decreases. Above 30% reduction rate, as roiled SGCI shows the better damping capacity than that of as east CVGCI and above 60% reduction rate, as rolled SGCI shows the better damping capacity than thats of as cast FGCI As the reduction rate of as rolled SGCI increases, the hardness and tensile strength increase. |
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