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3%Si-Fe中适量碳的存在,对细化热轧板晶粒,稳定初次再结晶基体都起到有利的作用.一旦初次再结晶完成后,碳作为“有利元素”的历史作用即告结束,它的继续存在不仅阻碍二次再结晶的顺利进行,更严重恶化成品磁性,特别是使磁时效极为显著.所以,二次再结晶以前的脱碳对于成品的质量至为重要. 本实验对脱碳过程进行了较详细的研究,导出了给定条件下脱碳速率的经验公式.根据此公式可由给定的脱碳时间,预测碳含量,反之亦然.同时,对脱碳过程中晶粒的正常长大也进行了研究,并给出了描述晶粒长大速率的公式.基于上述研究,讨论了二次再结晶前的碳含量、脱碳时间(晶粒尺寸)与材料最终磁性的相关性.磁性与碳含量、脱碳时间的函数关系用平面图形显示.利用此图形可直观、便捷地选择获得最佳性能的脱碳工艺.
The presence of a suitable amount of carbon in 3% Si-Fe plays an advantageous role in refining the hot-rolled plate grains and stabilizing the primary recrystallization matrix. Once the primary recrystallization is completed, the historical role of carbon as a “favorable element” , Its continued existence not only hinder the smooth progress of secondary recrystallization, more serious deterioration of the finished product magnetism, especially the magnetic aging is extremely significant.So, before the secondary recrystallization decarburization of the quality of the finished product is important.This experiment The decarburization process is studied in more detail and the empirical formula for the decarburization rate under a given condition is deduced.The carbon content can be predicted from the given decarburization time and vice versa.At the same time, The normal growth of the grains is also studied, and the formula describing the rate of grain growth is given.Based on the above studies, the carbon content before decrystallization, decarburization time (grain size) Magnetic Correlation Magnetic properties as a function of carbon content, decarburization time are displayed graphically on a flat graph that provides an intuitive and easy way to choose the decarbonization process for optimal performance.