Hydrogen permeability of slags containing calcium fluoride  

作　　者：董艳伍 姜周华 梁连科 李正邦 

机构地区：[1]School of Materials and Metallurgy,Northeastern University [2]Central Iron and Steel Research Institute

出　　处：《Journal of Central South University》2011年第4期1063-1067,共5页中南大学学报（英文版）

基　　金：Project(50904015) supported by the National Natural Science Foundation of China;Project(N090402012) supported by the Fundamental Research Funds for Central Universities of China

摘　　要：To investigate the hydrogen permeability of calcium fluoride used for electroslag remelting （ESR） process, ＂Gas-slag- metal＂ osmosis process under argon atmosphere saturated with water vapor at 318 K was used to study the hydrogen permeability of slag containing calcium fluoride. The results indicate that the conventional slag, consisting of 70% CaF2 and 30% A1203, has the lowest hydrogen permeability. A parameter EH was proposed for evaluation of the hydrogen permeability of slags containing calcium fluoride. The hydrogen permeability decreases with increasing EH to a certain extent. An appropriate choice of slag for the ESR process can be obtained. These results also suggest that the hydrogen pick-up in steel after remelting might be reduced when a slag with low hydrogen permeability is used.To investigate the hydrogen permeability of calcium fluoride used for electroslag remelting(ESR) process,"Gas-slag-metal" osmosis process under argon atmosphere saturated with water vapor at 318 K was used to study the hydrogen permeability of slag containing calcium fluoride.The results indicate that the conventional slag,consisting of 70% CaF2 and 30% Al2O3,has the lowest hydrogen permeability.A parameter EH was proposed for evaluation of the hydrogen permeability of slags containing calcium fluoride.The hydrogen permeability decreases with increasing EH to a certain extent.An appropriate choice of slag for the ESR process can be obtained.These results also suggest that the hydrogen pick-up in steel after remelting might be reduced when a slag with low hydrogen permeability is used.

关 键 词：electroslag remelting hydrogen permeability DIFFUSION calcium fluoride SLAG 

分 类 号：TF14[冶金工程—冶金物理化学]