含镁GH3128高温合金的电渣重熔用CaF2-CaO-Al2O3-MgO渣系的理化性能
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第一作者：王鹏飞
通讯作者：龚伟
合写作者：姜周华,张宇,李星彤,李帝阅
发表刊物：炼铁和炼钢
DOI码：10.1177/03019233241262837
刊物所在地：英国
摘要：During electroslag remelting, Mg in the electrode reacts with some components in the slag, resulting in its serve oxidation loss. The CaF2−CaO−Al2O3−MgO slags with high MgO content are generally used for remelting Mg-containing Fe- and Ni-based alloys. However, there is a scarcity of foundational data available on the physical and chemical properties of the slags, posing a challenge in developing a suitable slag for remelting Mg-containing GH3128 superalloy. Hence, this paper conducted a comprehensive study on the melting temperature, viscosity, and reactivity of four known slags. The results show that D2 slag (50%CaF2–20%CaO–20%Al2O3–10%MgO) has the lowest melting temperature of 1588 K due to containing fewer high-melting-point phases and possesses lower viscosity because of simpler aluminate structures. Additionally, the D2 slag has the highest activity ratio, enabling the superalloy to achieve the highest equilibrium Mg content of 0.0174%. The D2 slag exhibits a heightened MgO activity and facilitates the release of more Mg2+ ions, thereby exerting a pronounced inhibitory effect on the diffusion of Mg2+ ions from the slag–metal interface to the slag. The superalloy attains a highest Mg yield of about 30%. Therefore, the D2 slag emerges as the most suitable choice for remelting the Mg-containing GH3128 superalloy.
项目来源：国家自然科学基金面上项目
关键字：Mg-containing GH3128 superalloy, electroslag remelting, CaF2–CaO–Al2O3–MgO slag, melting temperature, viscosity, reactivit
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
ISSN号：0301-9233
是否译文：否