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采用热模拟方法及EBSD技术,研究Fe-3 wt%Si电工钢在不同温度下组织的动、静态再结晶及晶粒取向特征,特别是少量奥氏体对铁素体动、静态再结晶组织及取向的影响。结果表明,不同温度形变的组织主要分三类:形变长条铁素体、珠光体和等轴细小铁素体。长条形变铁素体内发生动态回复或连续式的动态再结晶,奥氏体周围的铁素体动态再结晶加速,部分以传统的不连续方式动态再结晶。铁素体、奥氏体都可发生静态再结晶。奥氏体的静态再结晶在1050℃以上明显,铁素体的静态再结晶随温度的升高逐渐进行,最显著的再结晶发生在1050℃。不同温度形变的样品,其形变晶粒取向主要以<111>和<100>为主,小等轴铁素体晶粒除与大形变铁素体取向相近外,出现了<110>取向及其它取向。
The dynamic and static recrystallization and grain orientation characteristics of Fe-3wt% Si electrical steel at different temperatures were studied by means of thermal simulation and EBSD techniques, especially the small amount of austenite on ferrite dynamic and static recrystallization microstructure And the impact of orientation. The results show that the different temperature deformation of the organization is divided into three categories: deformation of long ferrite, pearlite and small equiaxed ferrite. Dynamic strain recrystallization occurs in the long deformed ferrite, and the dynamic recrystallization of ferrite around the austenite accelerates. Some of them recrystallize dynamically in the traditional discontinuous mode. Ferrite, austenite can occur static recrystallization. The static recrystallization of austenite is obvious at 1050 ℃. The static recrystallization of ferrite gradually proceeds with the increase of temperature. The most significant recrystallization occurs at 1050 ℃. In the samples with different temperature deformations, the orientation of the deformed grains mainly consists of <111> and <100>, and the small equiaxed ferrite grains have <110> orientation and other orientation.