Vibration Damping Characteristics and Mechanical Properties of Composite Sheets Consisting of Rolled Spheroidal Graphite Cast Irons and Mild Steels

概要

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Laminated composites with 3-and 5-layers consisting of a mild steel and spheroidal graphite cast irons (steel/cast iron/ steel, steel/ cast iron/steel/cast iron/steel) were fabricated using diffusion bonding. The laminated composites were hot rolled and the final reductions were 88% and 92%. The main results obtained are as follows; (1) When the hot rolling of 92% reduction were carried out for the laminated composites, cracks were not observed in the cast iron and on the bond interface between the mild steel and the cast iron. By the hot rolling, spheroidal graphites in the cast iron became flaky in shapes. (2) The tensile strength of the rolled composite sheets with pearlitic structure was higher than that of the mild steel. In case of ferritic structure the strength of the composite sheet with 3-layers was a little lower than that of the mild steel, but the strength of the composite sheet with 5-layers was higher than that of the mild steel. (3) The specific damping capacity of the composite sheet with 5-layers was higher than that of the mild steel and it increased with an increasing reduction and the number of layers. (4) The damping effect of the sound pressure of the gear made of the rolled composite sheet with 9-layers was very high in comparison with that of the gear made of the mild steel.
社団法人溶接学会の論文
1992-04-01