Microstructure, texture and grain boundaries character distribution evolution of ferritic stainless steel during rolling process
Microstructure, texture and grain boundaries character distribution evolution of ferritic stainless steel during rolling process
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DOI：
10.1016/j.jmatprotec.2008.06.012
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发表时间：
2009-03
影响因子：
6.3
通讯作者：
Haitao Yan;H. Bi;Xin Li;Zhou Xu
中科院分区：
文献类型：
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作者：
Haitao Yan;H. Bi;Xin Li;Zhou Xu
为了更好地了解铁素体不锈钢的织构、显微组织和晶界特征分布演变，采用x射线衍射和电子背散射衍射技术研究了Cr含量为11wt%的铁素体不锈钢（热轧板、冷轧板和退火板）的织构、显微组织和晶界特征分布。冷轧热轧薄板的织构具有贯穿厚度的织构梯度。冷轧钢板中心层出现α-纤维织构，这是由于理想的平面应变变形所致。在接近地表的地方，检测到一个由剪切变形引起的大体方向。在退火过程中，由于再结晶过程形成了γ-纤维。冷轧钢板的显微组织随钢板厚度的变化呈非均匀性，退火钢板的显微组织随钢板厚度的变化呈均匀性。晶界特征分布结果表明，冷轧薄板退火后存在大量低角度晶界和大量高角度晶界及重合点阵。上述结果表明，织构的变化与晶界类型密切相关。
In order to better understand the texture, microstructure and grain boundaries character distribution evolution of ferritic stainless steel, the texture, microstructure and grain boundaries character distribution of ferritic stainless steel (hot rolled sheet, cold rolled sheet and annealing sheet) with 11wt%Cr content were studied using X-ray diffraction and electron back scattered diffraction technique. The texture of the hot and cold rolled sheets has a through-thickness texture gradient. In the center layer of the hot and cold rolling sheet, α-fiber texture was observed which was attributed to ideal plane strain deformation. Close to the surface a Gross orientation was detected which was attributed to shear deformation. During annealing, the γ-fiber was formed attributed to recrystallization process. The microstructure of the hot and cold rolled sheets was non-homogeneous through the sheet thickness, while, the microstructure of annealing sheets was homogeneous through the sheet thickness. Grain boundaries character distribution results show that there are many low angle grain boundaries in hot and cold rolled sheets and many high angle grain boundaries and coincidence site lattice after annealing. The above results indicated that the changes in texture are closely related to the grain boundaries type.