铸造分为一般铸造及高压铸造，我们常说的压铸是指高压压铸，是用压铸机将熔化的铝合金高速的压入模具中，并在高压下快速冷却成形。而一般铸造又分为砂铸，重力铸造，低压铸造，脱蜡铸造，差压铸造，陶瓷型铸造，石膏型铸造等。
所以铸造铝合金便是用一般铸造办法得到的铝合金，而压铸铝合金便是用高压压铸工艺办法得到的铝合金。
世界上各国关于铸造铝合金及压铸铝合金的命名办法是不同的，中国GB标准中将铸造铝合金用ZL+3位数字表示，例ZL101便是铸造铝合金，压铸铝合金用YL+3位数字表示，例YL102；日本JIS标准中将铸造铝合金用4位字数来描述，例AC4C，A代表铝，C代表一个系列，4C代表分类别；压铸铝合金用ADC+2位数字表示，比如用的广泛的ADC10，ADC12；ASTM标准中铸造铝合金用A+3位数字表示，其间3位数字的值大于359时为压铸铝合金，小于等于359时为铸造铝合金;例用得广泛的A380是压铸铝合金，而A356是铸造铝合金,首要用于重力铸造。
铸造铝合金容易作阳极，而压铸铝合金很难作。但压铸铝合金作电镀相对要好些。
文章源自：铜合金铸造厂 www.xin-mu.com
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