焼結鉄の弾性率に及ぼす成形圧力および焼結温度の影響

概要

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The effects of compacting pressure and sintering temperature on elastic moduli of sintered irons for reduced and atomized iron powders were investigated. The elastic moduli were mainly depended on porosity. The porosity decreased exponentially with increasing compacting pressure and was independent on sintering temperature. However, hecause the pore surface becomes smooth and the open porosity decreases with increasing sintering temperature, Young's modulus and shear modulus increased slightly at the equal porosity. It is clarified that the critical porosity exists where the downtrend of elastic moduli changes and increases with sintering temperature. Furthermore, the new equations of elastic moduli against kinds of iron powder, compacting pressure and sintering temperature that can be controlled on manufacturing of sintered parts, were deduced. The good correlation between calculated data by using of the equation with considering of the critical porosity and experimental data was obtained.
社団法人日本機械学会の論文
2002-05-25