冷变形共析钢的显微组织与织构探讨-《郑州大学学报(工学版)》

文章信息/Info

作者:: 姚旭升; 刘沿东; 蒋奇武; 等.; 东北大学,材料各向异性与织构教育部重点实验室,辽宁,沈阳,110004, 鞍钢集团,冷轧硅钢厂,辽宁,鞍山,114002

Keywords:: cementite; co-analysis steel; deformation texture; Orientation distribution function (ODF).

摘要:: 为了探讨共析钢冷变形显微组织和织构,对严重塑性变形的共析钢进行一定的热处理获得了一定形状与亚微米尺寸的渗碳体样品,然后对上述样品进行不同形变量轧制,获得了显微组织与织构的分析样品,采用场发射扫描电镜(FE-SEM)和织构衍射仪(XRD)对轧制样品进行显微组织和形变织构的分析.研究结果表明:对冷轧高碳钢的退火,可以发现层片状渗碳体数量减少,粒状渗碳体数量增多,形成了两种形状的渗碳体与铁素体共存的复相显微组织样品.冷轧过程中,铁素体晶粒被拉长并逐渐发展为纤维状;渗碳体晶粒大小与形状变化不大,分布较均匀.随着形变量的增加,共析钢中主要织构逐渐形成了由<110>//RD(轧向)的α-纤维织构和<111>//ND(轧面法向)的γ-纤维织构组成,晶粒取向逐渐聚集到{558}<110>以及{001}<110>等主要织构组分类型.

Abstract:: In order to explore the cold deformation microstructure and texture of the precipitated steel, the conformed steel with severe plastic deformation was subjected to certain heat treatment to obtain cementite samples of a certain shape and submicron size, and then the above samples were rolled with different deformation variables to obtain the analysis samples of microstructure and texture, and the microstructure and deformation texture of the rolled samples were analyzed by field emission scanning electron microscopy (FE-SEM) and texture diffractometer (XRD). The results show that the annealing of cold-rolled high-carbon steel shows that the number of lamellar cementite decreases and the number of granular cementite increases, forming a complex microstructure sample in which two shapes of cementite and ferrite coexist. During the cold rolling process, the ferrite grains are elongated and gradually develop into fibrous; The grain size and shape of cementite do not change much, and the distribution is relatively uniform. With the increase of deformation variables, the main textures in the co-analysis steel gradually formed a α-fiber texture consisting of <110>//RD (rolling direction) and γ-fiber texture of <111>// ND (rolling face normal), and the grain orientation gradually gathered to the main texture component types such as {558}<110> and {001}<110>.