CaF2-CaO-Al2O3-MgO渣中MgO含量和CaO/Al2O3比对含Mg GH3128合金中Mg氧化行为的影响
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第一作者：王鹏飞
通讯作者：龚伟,姜周华
合写作者：张宇,李帝阅
发表刊物：冶金与材料交易B
期号：12
卷号：55B
DOI码：10.1007/s11663-024-03319-4
刊物所在地：美国
摘要：Mg can refine and disperse carbides in GH3128 alloy, but it is easily oxidized by certain slag components during electroslag remelting, resulting in severe oxidation loss. To address this, CaF2–CaO–Al2O3–MgO slags with varying MgO contents and CaO/Al2O3 (C/A) ratios were designed. Slag-metal reaction experiments were conducted using a crucible in a resistance furnace at 1923 K, and thermodynamic and kinetic analyses were used to understand how these slags affect the oxidation loss of Mg. The results indicate that increasing the MgO content from 8 to 14 wt.pct and the C/A ratio from 0.7 to 1.3, the activity of MgO increases while the activity of Al2O3 decreases, thereby reducing the oxidation loss ratio of Mg from 80.43 to 67.35 pct and
from 83.52 to 63.54 pct, respectively. A higher MgO content inhibits the diffusion of MgO generated at the slag-metal interface into the slag. A higher C/A ratio enhances the bonding between CaO and Al2O3, thereby inhibiting the diffusion of Al2O3 from the slag to the slag-metal interface. A slag composition of 50 wt.pct CaF2, 22 wt.pct CaO, 17 wt.pct Al2O3, and 11 wt.pct MgO is suitable for remelting Mg-containing GH3128 alloy.
项目来源：国家自然科学基金面上项目
论文类型：SCI JCR Q2
学科门类：工学
文献类型：JCR 二区
一级学科：冶金工程
页面范围：5211-5220
ISSN号：1073-5615
是否译文：否