Al2O3和MgO耐火材料与高温合金界面反应差异性研究

doi:10.3969/j.issn.1001-1935.2026.03.001

耐火材料 ›› 2026, Vol. 60 ›› Issue (3): 185-191.DOI: 10.3969/j.issn.1001-1935.2026.03.001

• 研究开发 • 下一篇

Al₂O₃和MgO耐火材料与高温合金界面反应差异性研究

郭佳¹⁾, 陈光耀²⁾, 邓少文²⁾, 廖厚劲²⁾, 王恩会³⁾, 侯新梅³⁾, 李重河²⁾

1)首钢工学院北京 100043;
2)上海大学材料科学与工程学院上海 200072;
3)北京科技大学碳中和研究院北京 100083

收稿日期:2025-05-26 出版日期:2026-06-15 发布日期:2026-06-23
通讯作者: 陈光耀,男,1987年生,博士,副教授。E-mail:cgybless1@shu.edu.cn
作者简介:郭佳:女,1978年生,博士,高级工程师。E-mail:18611757307@163.com
基金资助:
国家重点研发计划(2022YFB3404501);国家自然科学基金(52025041,U2341267, 52374360, 52450003和52472031)。

Comparative study on the interaction Between Al₂O₃/MgO refractory and Ni-based superalloys

Guo Jia, Chen Guangyao, Deng Shaowen, Liao Houjin, Wang Enhui, Hou Xinmei, Li Chonghe

First author’s address:Shougang Institute of Technology, Beijing 100043, China

Received:2025-05-26 Online:2026-06-15 Published:2026-06-23

摘要/Abstract

摘要： Al₂O₃和MgO作为镍基高温合金熔炼用常用耐火材料,其与合金熔体的界面反应直接影响到合金纯净度。分别采用Al₂O₃和MgO坩埚真空感应熔炼高温合金GNPM01铸锭,通过X射线衍射仪、扫描电子显微镜及氧氮分析仪对比研究了两种坩埚与合金熔体接触前后的相组成、显微形貌及金属中氧含量的变化规律,进而对比分析了高温合金与Al₂O₃、MgO坩埚间的界面反应。结果表明:Al₂O₃坩埚在熔炼高温合金时,其内壁剥落及溶解是造成合金氧和夹杂物污染的主要原因,而由于合金中Al和Cr元素对氧有较强亲和力,在合金熔体表面易形成Al₂O₃和Cr₂O₃的浮渣;而MgO坩埚与高温合金界面反应,MgO溶解产生的氧易与合金中Al反应生成Al₂O₃,随之进一步与基体生成MgAl₂O₄夹杂,虽然减少了合金中Al₂O₃夹杂污染和氧污染,但生成的MgAl₂O₄会进一步进入合金熔体中形成夹杂污染。

关键词: 坩埚, 感应熔炼, 镍基高温合金, 界面反应, 浮渣

Abstract: Al₂O₃ and MgO are the common refractory for melting Ni-based superalloys.In addition,their interaction with the alloy melts could directly affect the purity of the alloys.In this study,Superalloy GNPM01 ingots were VIM using Al₂O₃ and MgO crucibles,respectively.The phase composition,microstructure,and variations in oxygen content in the alloy before and after contact between the two crucibles and the alloy melt were comparatively investigated using X-ray diffraction (XRD),scanning electron microscopy (SEM),and oxygen/nitrogen analyzers.Furthermore,the interfacial reactions between the superalloy and Al₂O₃/MgO crucibles were systematically analyzed.The results indicates that the spalling and the dissolution of the Al₂O₃ refractory was the main causes for the oxygen and inclusion contaminations in the alloy.Due to strong affinity of Al and Cr in the alloy melt for oxygen,Al₂O₃ and Cr₂O₃ slags were easily formed on the surface of the alloy melt.In contrast,during the interaction between MgO refractory and the alloy melt,the oxygen generated from the dissolution of MgO tended to react with Al in the alloy to form Al₂O₃,which then further reacted with the matrix to form MgAl₂O₄ inclusions.This reduces the contamination from Al₂O₃-type inclusion and oxygen in the alloy,but the formation of MgAl₂O₄ could further enter the alloy melt,resulting in inclusion contamination.

Key words: crucible, induction melting, Ni-based superalloys, interfacial reaction, sludge

中图分类号:

TQ17

郭佳, 陈光耀, 邓少文, 廖厚劲, 王恩会, 侯新梅, 李重河. Al₂O₃和MgO耐火材料与高温合金界面反应差异性研究[J]. 耐火材料, 2026, 60(3): 185-191.

Guo Jia, Chen Guangyao, Deng Shaowen, Liao Houjin, Wang Enhui, Hou Xinmei, Li Chonghe. Comparative study on the interaction Between Al₂O₃/MgO refractory and Ni-based superalloys[J]. Refractories, 2026, 60(3): 185-191.

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Al₂O₃和MgO耐火材料与高温合金界面反应差异性研究

Comparative study on the interaction Between Al₂O₃/MgO refractory and Ni-based superalloys

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