摘要
真空感应熔炼制备的自耗电极中夹杂物为不规则形状Al_(2)O_(3)-MgO氧化物。本文通过电渣重熔,对比研究了常规渣和稀土渣对高温合金中夹杂物的影响。结果表明:采用常规渣电渣重熔后,夹杂物仍然为Al_(2)O_(3)-MgO,但是MgO平均含量(质量分数)从21.08%增加至45.21%,部分夹杂物转变为球形。采用稀土渣电渣重熔后,约56.5%的夹杂物转变为细小圆整的稀土夹杂物(Al-Ce-Mg-Ca-O),夹杂物数量比常规渣电渣重熔的合金减少约24.5%;约79.1%稀土夹杂物被尺寸较小的初生碳化物包裹,形成稀土氧化物-碳化物双层复合结构,说明稀土夹杂物可以细化初生碳化物。
Inclusions in the consumable electrode fabricated by vacuum induction melting are unregular Al_(2)O_(3)-MgO.In this paper,a comparative study on the effects of traditional slag and rare earth bearing slag on inclusions of a superalloy during electroslag remelting was conducted.The results show that inclusions are still Al_(2)O_(3)-MgO after electroslag remelting(ESR)with traditional slag.However,the average MgO content(mass fraction)increases from 21.08%to 45.21%,and some inclusions transform to spherical ones.When the rare earth bearing slag is used during ESR,about 56.5%of inclusions transform to fine spherical Al-Ce-Mg-Ca-O type,and the number of inclusions decreases by about 24.5%.About 79.1%of Al-Ce-Mg-Ca-O type inclusions are enclosed by primary carbides to form oxide-carbide double-layer microstructure,which means that ESR with rare earth bearing slag can refine carbides.
作者
高小勇
陈金岩
唐龙博
任威旺
张立峰
GAO Xiaoyong;CHEN Jinyan;TANG Longbo;REN Weiwang;ZHANG Lifeng(School of Mechanical Engineering,Yanshan University,Qinhuangdao 066004,China;School of Mechanical and Materials Engineering,North China University of Technology,Beijing 100144,China)
出处
《中国有色金属学报》
北大核心
2026年第1期213-222,共10页
The Chinese Journal of Nonferrous Metals
基金
国家自然科学基金资助项目(52274398)
国家重点研发计划资助项目(2023YFB3709900)。
