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鋁硅中間合金是熔配各种牌号鋁合金所必需的重要合金。由于硅的比重比鋁小,所以在熔制鋁硅中間合金时一般都是將硅块用鋁箔包起来,沉入到氧化鋁薄膜下面的鋁液中去熔化。这样就可以避免硅浮在鋁液表面,生成二氧化硅,从而使熔点变高,发生不易熔化的情况。去年第四季度由于买不到鋁箔,又找不到代用品,我們將廢坩堝的底做成鐘罩形,鑽上几个孔,并用鉄棒一端車出螺絲用螺帽固紧廢坩堝底(如附
Aluminum-silicon master alloy is a melting alloy with various grades of aluminum alloy necessary for the important alloy. Because the specific gravity of silicon is smaller than that of aluminum, silicon ingots are usually wrapped in aluminum foil while melting the aluminum-silicon intermediate alloy, and the metal is sunk into the molten aluminum under the aluminum oxide film. In this way, it is possible to prevent the silicon floating on the surface of the aluminum liquid to generate silicon dioxide, so that the melting point becomes high and melting does not easily occur. In the fourth quarter of last year, because we could not buy the aluminum foil and could not find any substitutes, we made the bottom of the waste crucible into a bell-shaped shape, drilled a few holes, and screwed out the screws at the end of the crucible to fasten the waste crucible bottom If attached