铸件

QT液的结膜温度是多少?

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QT铁液1380就倒不出来了,挂包严重.原材料没问题.炉工操作失误,多加增碳剂4公斤,造成这种情况.球化后饱合的碳应该上浮除渣时应该被清除的,怎么还会影响温度呢?

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调整配料,加大废钢量.
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从铁碳相图可知,C高,液相线温度也高,流动性肯定就差了.以前炉工将增碳剂加重复了,C达到了4.4%,茶壶包嘴都堵死了,和1楼情况差不多.
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c量过高过共晶球铁,这个估计石墨漂浮严重不能浇注了,除非很薄的件.
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