マグネシウム合金の射出成形技術に関する基礎研究 : マグネシウム合金粒子充填層のかさ密度に与える温度,見掛け圧力および時間の影響

概要

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The present study investigated experimentally the effects of temperature, pressure and time upon bulk density of packed bed of magnesium alloy particles. The test particles made of AM 50A or AZ 91D were poured into a cylindrical vessel and were applied a given superficial pressure for six hours under a constant temperature condition. The superficial pressure was changed between 2.5MPa and 10MPa, and the temperature was varied from 95.5℃ to 457℃. The bulk density increased after the pressure was applied and then it reached to a terminal value in cases that the temperature was below 100℃. Continuous increase in the bulk density due to creep deformation was observed in cases that the temperature was over 150℃, and it became remarkable in cases that the temperature was over 250℃. The bulk density at a certain time was increased with an increase in the temperature and the superficial pressure. The increasing rate of the bulk density could be expressed as a function of temperature, superficial pressure and the bulk density.
一般社団法人日本機械学会の論文
2006-04-25