氧化铝坩埚与高温合金的界面反应机制  

Interfacial Reaction Mechanism between Alumina Crucible and Nickle-based Superalloy

作　　者：姜卫国 郭万军 董琳[1,2] 刘飞扬 李延昭 李强 谢冬柏[1,2] 王瑞春 任玉艳 Jiang Weiguo;Guo Wanjun;Dong Lin;Liu Feiyang;Li Yanzhao;Li Qiang;Xie Dongbai;Wang Ruichun;Ren Yuyan(School of Intelligent Manufacturing,Weifang University of Science and Technology;Weifang Key Laboratory of High-temperature Materials and Single Crystal Components Fabrication Technology for Advanced Engine System;Jiangsu JITRI Novel Metal Research Institute Co.,Ltd.)

机构地区：[1]潍坊科技学院智能制造学院 [2]潍坊市先进动力系统用热端材料及单晶部件制备重点实验室 [3]江苏集萃先进金属材料研究所有限公司

出　　处：《特种铸造及有色合金》2023年第3期308-313,共6页Special Casting & Nonferrous Alloys

基　　金：国家自然科学基金资助项目(51674235)。

摘　　要：研究了真空感应熔炼过程中氧化铝坩埚与高温合金的界面反应过程。结果表明,高温合金熔炼过程中,合金中的Cr、Al等元素与坩埚内壁中的SiO_(2)反应生成Si及Cr_(2)O_(3),生成的Si进入到熔体中形成Al_(4)Si、Cr_(3)Ni_(2)Si等硅化物,在高温真空环境下挥发并在熔体液面以上的坩埚壁上形成沉积层;生成的Cr_(2)O_(3)与熔体液面以下坩埚壁中的Al_(2)O_(3)反应生成粉红色的Al_(2)O_(3)-Cr_(2)O_(3)固溶体反应层,反应层厚度随坩埚内熔体深度的增加而增大。随坩埚使用次数的增加,合金熔体表面浮渣明显增多。The interfacial reaction between alumina crucible and superalloy during vacuum induction melting was investigated.The results indicate that the Cr and Al elements of superalloy can react with SiO_(2) inside the inner wall of crucible to form Si and Cr_(2)O_(3).The generated Si is diffused into superalloy to form Al_(4)Si and Cr_(3)Ni_(2)Si silicide,which can volatilize under high vacuum atmosphere,and deposite on the surface of the crucible wall above melt to form sedimentary layer.The generated Cr_(2)O_(3) reacts with Al_(2)O_(3) inside the inner wall of crucible below melt to form Al_(2)O_(3)-Cr_(2)O_(3) solution layer,of which the thickness is increased with the increase of the melt depth.The slag amounts on the surface of melt are increased apparently with crucible usage.

关 键 词：真空感应熔炼 高温合金 氧化铝坩埚 界面反应 

分 类 号：TG27[金属学及工艺—铸造] TG132.32[一般工业技术—材料科学与工程]