定向高温合金UGTC47与硅基陶瓷型芯界面反应研究  

Interfacial Reaction between UGTC47 Directional Superalloy and Silicon-based Ceramic Core

作　　者：戴睿卿 玄伟东 张强 余旭 樊志明 段方苗 白小龙 王保军 任忠鸣 DAI Ruiqing;XUAN Weidong;ZHANG Qiang;YU Xu;FAN Zhiming;DUAN Fangmiao;BAI Xiaolong;WANG Baojun;REN Zhongming(State Key Laboratory of Advanced Special Steel,Department of Material Science and Engineering,Shanghai University,Shanghai 200444;China United Heavy Duty Turbine Technology Co.,Ltd.,Beijing 100061)

机构地区：[1]上海大学材料科学与工程学院,省部共建高品质特殊钢冶金与制备国家重点实验室,上海200444 [2]中国联合重型燃气轮机技术有限公司,北京100061

出　　处：《特种铸造及有色合金》2025年第1期112-117,共6页Special Casting & Nonferrous Alloys

基　　金：国家自然科学基金资助项目(52274386,92060104)。

摘　　要：在空心涡轮叶片的铸造过程中,合金熔体在高温下长时间与陶瓷材料接触,容易发生界面反应,影响叶片品质。探究了1 530℃时不同保温时间下UGTC47合金与SiO_(2)陶瓷型芯的界面反应及其形成规律。使用Miedema数值模型计算合金的组元活度和反应生成热以探讨界面反应发生的可行性。结果表明,UGTC47合金中的Hf元素与陶瓷型芯中的SiO_(2)发生置换反应生成HfO_(2)层,Al元素发生氧化反应生成Al_(2)O_(3)层,两种反应层厚度随着时间的延长分别从5.82μm和2.31μm增加到11.13μm和2.95μm。Interfacial reaction easily occurs due to contact of alloy melt with ceramic materials for a long time during the casting process of hollow turbine blades,which affects the quality of blades.The interfacial reaction between UGTC47 alloy and silica ceramic core at 1530℃ for different holding time as well as the formation law was investigated.The component activity and reaction formation heat were calculated by Miedema numerical model to explore the feasibility of interfacial reaction.The results indicate that Hf in UGTC47 alloy substitutes with SiO_(2) in the ceramic core to form HfO_(2) layer,and Al is oxidized to form Al_(2)O_(3) layer.With the reaction proceeding,the thicknesses of both reaction lay⁃ers are increased from 5.82μm and 2.31μm to 11.13μm and 2.95μm,respectively.

关 键 词：UGTC47高温合金 SiO_(2)陶瓷型芯 保温时间 热力学 界面反应 

分 类 号：TG249.5[机械工程—精密仪器及机械] TG132.32[金属学及工艺—铸造]