Modeling decarburization kinetics of grain-oriented silicon steel  

作　　者：Hai-Wen Luo Rui Xiang Ling-Feng Chen Li-Mei Pan 

机构地区：[1]Research Center of Electrical Steels, Central Iron & Steel Research Institute [2]School of Materials Engineering and Science, University of Science and Technology Beijing [3]Department of Silicon Steels, Qian’an Iron & Steel Corp. ShouGang Group

出　　处：《Chinese Science Bulletin》2014年第15期1778-1783,共6页

摘　　要：A mathematic model has been presented to predict the decarburization kinetics of grain-oriented silicon steel sheet in the gas mixture of N2–H2–H2O during annealing.This model is based on the carbon flux balance between the oxidation reaction at the surface and the carbon diffusion inside the steel sheet.It can be numerically solved to quantify the influences of annealing temperature and atmosphere on decarburization kinetics when the boundary conditions are properly determined.In case that a humid gas mixture is employed during annealing,the most influential process parameter is temperature rather than compositions of the gas mixture,because the diffusion of carbon in ferrite is the rate-limiting step.Therefore,a higher temperature is required for the efficient decarburization of the thicker silicon steel sheet using the industrial continuous annealing production line.A mathematic model has been presented to predict the decarburization kinetics of grain-oriented sili- con steel sheet in the gas mixture of N2-Ha-H20 during annealing. This model is based on the carbon flux balance between the oxidation reaction at the surface and the car- bon diffusion inside the steel sheet. It can be numerically solved to quantify the influences of annealing temperature and atmosphere on decarburization kinetics when the boundary conditions are properly determined. In case that a humid gas mixture is employed during annealing, the most influential process parameter is temperature rather than compositions of the gas mixture, because the diffusion of carbon in ferrite is the rate-limiting step. Therefore, a higher temperature is required for the efficient decarburi- zation of the thicker silicon steel sheet using the industrial continuous annealing production line.

关 键 词：取向硅钢 晶粒取向 动力学 脱碳 连续退火生产线 气体混合物 建模 退火温度 

分 类 号：TG156.2[金属学及工艺—热处理]