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首页> 外文会议>Association for Iron amp; Steel Technology(AIST) Process Metallurgy, Product Quality and Applications Proceedings; 20040926-29; New Orleans,LA(US) >Precipitation in Ferrite During Isothermal Aging of X80 Steel
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Precipitation in Ferrite During Isothermal Aging of X80 Steel

机译：X80钢等温时效过程中铁素体的析出

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摘要

In Nb microalloyed steels one of the strengthening mechanisms is precipitate of Nb(C, N). As well, steel made from scrap can contain up to 0.4% Cu, which can also potentially precipitate in ferrite. However, most research has shown that steel with Cu levels below 0.5% does not precipitate out Cu under normal processing conditions. In this work, the microstructure of such steels, processed by a variety of thermomechanical treatments, have been characterized by field emission scanning electron microscopy (FE-SEM). At low ageing temperatures, simulating the coiling stage in steel hot rolling, many fine Cu precipitates were observed in ferrite compared to a few relatively large Nb containing precipitates. These results will be rationalized, and the consequences discussed.
机译：在Nb微合金钢中，强化机制之一是Nb（C，N）的析出。同样，由废钢制成的钢可能含有最多0.4％的铜，铜也可能在铁素体中沉淀。但是，大多数研究表明，铜含量低于0.5％的钢在正常加工条件下不会从铜中析出。在这项工作中，已通过场热扫描电子显微镜（FE-SEM）对经过各种热机械处理的此类钢的显微组织进行了表征。在低时效温度下，模拟钢热轧的卷取阶段，与少量相对较大的含Nb的析出物相比，在铁素体中观察到许多细小的Cu析出物。这些结果将被合理化，并讨论后果。

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