CAST IRON MATERIAL EXCELLENT IN VIBRATION DAMPING CAPACITY AND PRODUCING METHOD THEREFOR

PROBLEM TO BE SOLVED: To provide a cast iron material excellent in vibration damping capacity in which vibration damping capacity is increased and to provide a method for producing the same. SOLUTION: This cast iron material excellent in vibration damping capacity has a hyper-eutectic composition, m...

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Bibliographische Detailangaben
Hauptverfasser:	MANABE TOSHIHITO, AKITA NORIHIRO
Format:	Patent
Sprache:	eng
Schlagworte:	ALLOYS CASTING CASTING OF METALS CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES CHEMISTRY FERROUS OR NON-FERROUS ALLOYS METALLURGY METALLURGY OF IRON PERFORMING OPERATIONS POWDER METALLURGY PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OFWROUGHT-IRON OR STEEL TRANSPORTING TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a cast iron material excellent in vibration damping capacity in which vibration damping capacity is increased and to provide a method for producing the same. SOLUTION: This cast iron material excellent in vibration damping capacity has a hyper-eutectic composition, moreover, in which many graphite and many fine pores are formed, and the porosity is set to 2.0 vol.% or more. In the method for producing the cast iron material excellent in vibration damping capacity, a producing stage in which molten metal having a hyper-eutectic composition is produced, an adding stage in which an aluminum series addition material is added to the molten metal, a holding stage in which the molten metal is held in a molten state after the addition of the aluminum series addition material and a solidifying stage in which the molten metal subjected to the holding stage is solidified are performed in succession to produce a cast iron material having a hyper-eutectic composition, moreover, in which many graphite and many fine pores are formed, and the porosity is 2.0 vol.% or more. Furthermore, the area ratio of pearlite can be increased by increasing the content of manganese in the matrix.