工程科学学报2016，Vol.38Issue(1)：71-76,6.DOI:10.13374/j.issn2095-9389.2016.01.010
无取向电工钢脱碳组织的动力学分析
Kinetic analysis of decarburized microstructure in non-oriented electrical steel
摘要
Abstract
Decarburization of non-oriented electrical steel in the two-phase region is a known method to acquire a columnar ferrite structure which may effectively ameliorate the microstructure homogeneity of materials.In this paper,the growth process of columnar grains was analyzed from the kinetics point of view.The results show that the columnar structure formation involves two stages:nucleation and directed growth.Directed growth is a sort of interface migration process caused by both reaction-diffusion and recrystallization growth,and fits a parabolic law.The growth rate and the annealing temperature do not show a monotonic functional relationship,but the growth rate reaches a maximal value when the temperature is 900 ℃.At last,we get the size constraint condition of columnar nuclei on the basis of the derived growth rate formula,which may present some significance for guiding the design of relevant decarburization parameters in industrial production.关键词
电工钢/脱碳/柱状晶/动力学分析Key words
electrical steel/decarburization/columnar crystals/kinetic analysis分类
矿业与冶金引用本文复制引用
夏冬生,谢利..无取向电工钢脱碳组织的动力学分析[J].工程科学学报,2016,38(1):71-76,6.基金项目
国家自然科学基金资助项目(51071024) （51071024）
