Joining of dissimilar alloy porous aluminum by press forming with reciprocated press die

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  • プレス加工およびプレス型の横方向の往復運動による異種合金ポーラスアルミニウムの接合
  • プレス カコウ オヨビ プレスガタ ノ ヨコホウコウ ノ オウフク ウンドウ ニ ヨル イシュ ゴウキン ポーラスアルミニウム ノ セツゴウ

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Abstract

<p>In this study, two-layered porous aluminum consisting of A1050 commercial-purity aluminum and ADC12 Al-Si-Cu aluminum alloy was fabricated by joining A1050 and ADC12 porous aluminum with foaming process. As a joining method, press forming immediately after foaming of the two types of porous aluminum that were foamed at the same time was introduced. In addition, to promote material flow during joining, the pressing die was reciprocated in the horizontal direction during press forming. Preliminary experiments showed that the A1050 and ADC12 precursors can be foamed at the same time by applying black toner to the surface of the A1050 precursor. From the joining experiments, although the pressed surface and A1050 part of the porous aluminum was densified at an amplitude of 40 mm, it was found that a two-layered porous aluminum with good pore structures can be obtained at an amplitude of 5 mm. By the four-point bending test of the obtained two-layered porous aluminum, we observed pores of the porous aluminum on the fracture surface. This finding indicates that strong bonding can be obtained by press forming immediately after foaming with a reciprocation of the pressing die.</p>

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