Structural Evolution of Thin Lamellar Cementite during Cold Drawing of Eutectoid Steels

Structural Evolution of Thin Lamellar Cementite during Cold Drawing of Eutectoid Steels
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共析钢冷拔过程中薄层状渗碳体的结构演变

DOI:
10.1016/j.proeng.2014.10.062
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发表时间:
2014
期刊:
Procedia Engineering
影响因子:
--
通讯作者:
Andrzej
Andrzej
中科院分区:
--
文献类型:
--
作者:
Gerstein;Gregory;Nürnberger;Florian;Dudzinski;Wlodzimierz;Grygier;Dominika;Schaper;Milenin;Andrzej

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共析钢丝在等温温度下进行热处理,不仅产生珠光体显微组织,而且产生贝氏体和马氏体。这些线随后被拉伸到增加的应变水平。用扫描电镜和透射电镜观察了显微组织的演变。在不同的拉伸阶段的片层间距的测量揭示了变薄和分支的片层。除此之外,热处理的类型影响薄片的外观和细小碳化物的形成。采用数值模型计算了变形条件和层间距。根据科学文献中的各种模型,分析了方解石的转化和溶解、方解石的分支和沿沿着位错的扩散。
Eutectoid steel wires are heat treated at isothermal temperatures to generate not only pearlitic microstructures but also bainite and martensite. These wires are subsequently drawn to increasing strain levels. The microstructural evolution is observed using scanning electron microscopy SEM and transmission electron microscopy TEM. Measurements of the lamellar spacing at different drawing stages reveal a thinning and a branching of the lamellae. In addition to this, the type of heat treatment influences the appearance of the lamellae and the formation of fine carbides. A numerical model was employed to compute the deformation conditions and the interlamellar spacing. The transformation and dissolution of cementite, branching of cementite and diffusion along dislocations were analysed with respect to various models from the scientific literature.
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DOI: --
发表时间: 2014
期刊:
影响因子: --
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