単ロール急冷凝固法により作製した純アルミニウムおよびＡｌ‐Ｓｉ合金箔の表面状態に及ぼすロール面仕上げの影響

Abstract

Effects of the polishing condition of the roll on the roll contacting surface of the foil manufactured by the single roll method were investigated. The surface of roll made of copper was polished by #240, 600, 1200 emery paper, in direction either parallel to rotating direction or to lateral direction. Three specimens, 99.99 mass%Al, Al-2 mass%Si and Al-12 mass%Si were examined at a roll speed of 1500rpm (24m/s)and 3500rpm (55m/s). The wetting pattern on the roll contacting side surface of the foil consists of the uncontacting area and directly contacting area with the roll. Triangle shaped depressions pointing the rotating direction are found on the uncontacting area. The polishing direction does not affect the direction of the depressions while small depressions are not observed in the case of the roll polished in the lateral direction. The roll should hence be polished in the lateral direction. The effects of the polishing condition and direction on the wetting pattern, on the roughness of the roll contacting surface of the foil, and on the contact area between foil and roll are not greater than those of the roll speed.