成長した球状黒鉛鋳鉄の摩耗特性
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概要
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Various properties of grown nodular graphite cast iron around wear characteristic were investigated and furthermore the iron was compared with sintered iron for structural parts (SMF4020) whose inner structure was similar to grown iron to promote the probability of utilization as new industrial materials. The resutls obtained were summarized as follows :1) Density of the iron decreased and damping capacity increased with the growth, but higher mechanical properties were kept even after 10% linear growth (tensile strength; 70kgf/mm2, BHN; 180).2) Wear resistance increased with the growth and melting wear vanished in the range of high friction speed and furthermore adhesive wear vanished in 10% grown iron. Those depended on the results that the iron grew due to the mechanism of irreversible graphite migration and fine graphite nodules redistributed in the matrix and the area of lubrication increased.3) Wear resistance of all grown irons was superior to that of sintered iron in all friction speed and amount of wear was about from 1/2 to 1/3 that of sintered iron on the average.4) It was thought that grown nodular graphite iron might be new industrial materials which could be partially replaced with sintered iron. Especially, 2% grown iron was thought to have a bright prospect as it had high tensile strength (80kgf/mm2), high damping capacity (5 times that of as-cast iron), high wear resistance (3 times that of sintered iron at the maximum) and cheaper cost for manufacture.
- Japan Foundry Engineering Societyの論文
Japan Foundry Engineering Society | 論文
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