Al-Mg-Si系のアルミニウム合金板の熱間プレス成形

概要

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An improvement of a press formability of heat-treatable aluminium alloys sheets by a hot-deep drawing process was investigated.The process consisted of a rapid heating by using the heat convection from a heated steel plate,the deep-drawing with cold- or hot-tools and a water-quenching by a water-spray was proposed.The process was conducted continuously that the sheet was heated above 540℃,and then formed by the press-machine within the range of 30 and 100 mm・s^-1 and quenched by the water-spray within 1s immediately after the press.The limiting draw ratio was increased by 30% from 2.0 to 2.3 by using the heated tools for the pressing.But the press with non-heated die was not able to form the cup.It was found that the proposed process is useful for improvement of formability of heat-treatable aluminium alloys sheets by 30% in limiting draw ratio.