自動車足回り用高強度アルミニウム鍛造合金の開発

摘要

Aluminum suspension parts are widely used for improvement of driving performance of motor vehicle without increasing mass and less fuel consumption. Strengthening of aluminum alloy is effective for mass reduction. But, increasing the strength of material brings the reduction of the toughness and corrosion resistance in general. A new Al-Mg-Si alloy was developed for forging stocks of suspension arm. This new alloy, SG210 exhibits higher strength without reduction of charpy impact value and corrosion resistance compared with 6061 alloy by controlling not only chemical composition but also microstructure.%(1)足回り部品用アルミニウム鍛造用合金の高強度化rnこ際しては，靭性や耐食性を同時に確保することが必要rnである。そのためには，成分の調整以外に組織の制御にrnよる高強度化，すなわちファイバー状の組織に制御するrnことが好ましい。