论文部分内容阅读
为研究超纯铁素体不锈钢的再结晶退火对板材抗皱性的影响,采用拉伸试样表面粗糙度测量、X射线衍射(XRD)和电子背散射衍射(EBSD)技术对再结晶程度不同的板材表层和中心层的起皱程度、显微组织和织构进行了检测分析。结果表明,再结晶程度不同的板材具有不同的表面抗皱性;晶粒细小,尺寸均匀度好的再结晶退火组织有利于提高板材的表面抗皱性;退火钢板中心层再结晶程度较表层深,且起皱严重。分析认为:超纯铁素体不锈钢板材中心层再结晶形成的强点突出的γ纤维织构以及大范围的γ纤维取向团簇是造成板材表面起皱的重要原因;表层由于再结晶程度较弱,形成的γ纤维织构在γ取向线上分布均匀、无明显织构强点,显微组织也较为精细,因此对板材的起皱形貌具有缓解和覆盖的作用。
In order to study the effect of recrystallization annealing of ultrapure ferritic stainless steel on the wrinkle resistance of sheet metal, the surface recrystallization of tensile specimens was measured by X-ray diffraction (XRD) and electron backscatter diffraction (EBSD) The degree of wrinkling, microstructure and texture of the surface and center of the sheet were tested. The results show that the recrystallized sheets with different degree of recrystallization have different surface wrinkle resistance. The recrystallized annealed microstructure with fine grain size and uniform size is favorable to improve the wrinkle resistance of the sheet. The recrystallization degree of the annealed steel sheet is deeper than the surface layer Wrinkles serious. The analysis shows that the prominent γ-fiber texture formed by the recrystallization of the central layer of the ultrapure ferritic stainless steel sheet and the wide range of γ-fiber orientation clusters are the important reasons for the sheet surface wrinkling. The surface recrystallization degree is weak , The γ fiber texture formed is evenly distributed in the γ-orientation line, and has no obvious strong point of texture and the microstructure is fine. Therefore, the wrinkle appearance of the plate material has the effect of mitigating and covering.