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晶粒取向硅钢的磁性和晶体织构直接相关,因此,在研制过程中,往往需要进行有关晶粒取向和晶体织构的大量检测工作。实践表明,蚀坑金相法是测定晶粒取向极为便捷而有效的方法,其测量精度也可达到实用要求。本文介绍了用蚀坑法观测热轧板织构及二次再结晶晶粒位向。用上述方法,沿热轧板纵断面测定了织构及其在断面不同深度处的分布及变化情况。对于变压器钢的研究者和生产者而言,重要的是了解二次再结晶晶粒取向的散乱程度。文中阐述了试样的制备,并介绍了根据蚀坑几何参数测定晶粒取向的便捷方法。选择了三个角度参数以确定晶粒位向:θ—轧向与[001]在轧面上投影间的夹角;φ—[001]与轧面间的夹角;ω—[110]与轧面间的夹角。导出了蚀刻[100]面系时形成的三角形和矩形蚀坑的几何参数与φ、ω的函数关系,并编成数据表,以便根据蚀坑几何参数确定相应的φ和ω值。根据所得θ,φ和ω值即可绘出反映晶粒取向度的{100}极图。
The grain-oriented silicon steel is directly related to the magnetic texture and crystal texture. Therefore, a large amount of testing on grain orientation and crystal texture is often required in the development process. Practice shows that etching pits metallographic method is very convenient and effective method for the determination of grain orientation, the measurement accuracy can reach practical requirements. In this paper, the texture of the hot rolled plate and the orientation of the secondary recrystallized grains are observed by the pit method. Using the above method, the distribution of the texture and its distribution at different depths of the cross section and the variation thereof were measured along the longitudinal section of the hot rolled sheet. For researchers and producers of transformer steels, it is important to understand the degree of disordering of secondary recrystallized grains. The article describes the preparation of the sample, and introduces the convenient method of determining the grain orientation according to the geometric parameters of the pit. Three angle parameters were selected to determine the grain orientation: the angle between the θ-rolling direction and the [001] projection on the rolling surface; the angle between φ- [001] and the nip; ω- [110] and The angle between the rolling surface. The geometrical parameters of the triangular and rectangular pits formed as a function of etch [100] surface are derived as a function of φ, ω and compiled into a data table to determine the corresponding φ and ω values based on the geometrical parameters of the etch pits. From the resulting values of θ, φ, and ω, a {100} pole figure that reflects the degree of grain orientation can be plotted.