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合金熔制工艺中最基本的特性要求是化学成份的均匀性。反射炉中熔制的复化铝合金化学成份极不均匀,熔炼过程中的不稳定熔炼工艺,落后的搅拌方法造成个别组元的含量波动很大,甚至在一个熔次中也是如此。以前的复化铝合金ΓOCT标准只是间接地考虑了搅拌方法的缺点,标准中允许合金中个别组元含量在30～100%的范围内波动。这同样也是正在生效的ΓOCT1583—73标准的固有缺点。
The most basic characteristic of the alloy melting process is the chemical composition uniformity. Refined furnace melting complex aluminum alloy chemical composition is very uneven, unstable melting process smelting process, behind the mixing method caused a significant variation in the content of individual components, even in a fusion level is also true. The previous ΓOCT standard for composite aluminum alloys merely considered indirectly the shortcomings of the mixing method, which allowed the individual component content in the alloy to fluctuate in the range of 30 to 100%. This is also an inherent disadvantage of the ΓOCT1583-73 standard that is in force.