Effect of NaF and CaO/SiO2 on the Hydrogen Dissolution in the CaO-SiO2-FeOt Based Flux System

被引：5
|
作者：
Chung, Sung Hoon [1 ]
Park, Jun-Yong [1 ]
Park, Sea-Jung [2 ]
Chang, Woong-Seong [2 ]
Sohn, Il [1 ]
机构：
[1] Yonsei Univ, Dept Mat Sci & Engn, Seoul 120749, South Korea
[2] Res Inst Ind Sci & Technol, Pohang, South Korea
来源：
ISIJ INTERNATIONAL | 2013年 / 53卷 / 01期
关键词：
NaF; CaO/SiO2; hydrogen solubility; welding flux; FTIR; Raman; SILICATE MELTS; IRON; SPECTRA; STEEL;
D O I：
10.2355/isijinternational.53.27
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The compositional effect of NaF and CaO/SiO2 on the hydrogen solubility in the NaF-CaO-SiO2-FeOt welding flux system at 1 823 K is presented. At a CaO/SiO2 of 1.3, higher NaF decreased the hydrogen solubility and at a CaO/SiO2 of 1.5, higher NaF had relatively little effect on the hydrogen solubility in the flux. The hydrogen solubility with CaO/SiO2 showed a parabolic behavior showing a minimum near unit basicity and increasing with higher basicity. FTIR (Fourier transform infra red) and Raman spectroscopy of as-quenched flux samples showed the addition of NaF and higher CaO/SiO2 depolymerized the flux structure. At low and intermediate basicities from 0.9 to 1.3, higher NaF decreased the incorporated hydroxyl sites of Si(OH) and FeO(OH), which correlates well to lower hydrogen values.
引用
收藏
页码：27 / 33
页数：7
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