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macroscopic inclusion
tech.
宏观包裹体
macroscopic inclusions
met.
低倍夹杂
;
宏观夹杂
(【技】在钢坯或钢材酸浸试片上通过低倍检验显露出的夹杂物。该类夹杂物主要分为三种类型:①外来金属,如误人钢水内的金属条、块、片及未来得及熔化的脱氧合金残余;②外来非金属夹杂,如未来得及浮出残留在钢水中的熔渣及耐火材料;③翻皮,即下注时钢锭模内形成的半凝固膜卷人钢中的残留物。)
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