表面技术2018，Vol.47Issue(1)：135-141,7.DOI:10.16490/j.cnki.issn.1001-3660.2018.01.021
粉末渗锌工艺中锌扩散的数值模拟
Diffusion Numerical Simulation of Zinc in Sherardizing
摘要
Abstract
The work aims to predict diffusion process of sherardizing in the method of numerical simulation. Based on analysis of sherardizing mechanism and formation process of Fe-Zn coatings as well as the Fick's second law, the sherardizing model with zinc as the main diffusion element was established in finite difference method. Variation of thickness and content of Zinc layer as a function of time and temperature in a certain temperature range and time was calculated and compared with the experimental measurements in the same conditions to validate reliability of this model. Firstly, the sherardizing samples were incubated at 360, 375, 390 ℃ for 4, 6, 8 hours, respectively. Secondly, phase thickness and Zn content of alloy layer in the sam-ples were measured with scanning electron microscopy/energy-dispersive spectrometer and SmileView software, the measure-ments were compared with the results of numerical simulation. Content variation of various phases measured by the experiments coincided with calculation result. The phase thickness and total thickness of the alloy layer were close to calculation results. The model could favorably reflect the variation of Zinc layer content and thickness as a function of time and temperature, it could also be used to calculate and simulate variation of Zinc layer thickness and content in certain temperature range and certain time.Therefore, this model is of general validity to predict the zinc diffusion during sherardizing and can be used to guide the sherar-dizing process.关键词
粉末渗锌/数值模拟/有限差分/扩散/模型/Fick第二定律Key words
sherardizing/numerical simulation/finite difference/diffusion/model/Fick's second law分类
矿业与冶金引用本文复制引用
高海云,李小波,冯文营,彭淀..粉末渗锌工艺中锌扩散的数值模拟[J].表面技术,2018,47(1):135-141,7.基金项目
国家自然科学基金(51071181)Supported by the National Natural Science Foundation of China(51071181) （51071181）
