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对石墨漂浮现象如何判断?

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球墨铸铁在炼钢时,对石墨漂浮现象如何判断?如何区分“石墨漂浮”和出现碎块装石墨?
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炼钢?笔误吧。石墨漂浮,一般有聚集现象,碎块石墨,一般没有明显聚集现象,可以通过金相检验的偏振光效应区分是否是球墨
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