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鋁合金鑄錠的质量优劣,在很大程度上取决于鑄錠內气孔夹渣的含量多寡及其分布状态。氧化膜的弄脏度超过0.1(毫米~2/厘米~2)为废品,在检查的断口上发現有一个0.5毫米~2的气孔則为不合格品。 鋁合金凝固时要放出大量气体,当气体来不及逸出时,就形成了气孔或疏松。从图1可見,凝固时氢在鋁中的溶解度突然降低,从而增加了气孔和疏松的产生机会。图2也說明了随着鋁合金中气体含量
The quality of aluminum ingot ingot depends to a large extent on the amount of stomatal slag inclusions in the ingot and its distribution. Oxide film dirties of more than 0.1 (mm ~ 2 / cm ~ 2) for the scrap, in the inspection of the fracture was found to have a 0.5 mm ~ 2 stomata is a nonconforming product. Aluminum alloy solidification to release a large amount of gas, when the gas escape too late, it formed a stomatal or loose. As can be seen from Figure 1, the hydrogen solubility in aluminum suddenly decreases during solidification, thereby increasing the chances of porosity and porosity. Figure 2 also shows the gas content in the aluminum alloy