首页 | 本学科首页   官方微博 | 高级检索  
     

K417G高温合金大间隙钎焊的组织演变与性能的研究
引用本文:程准,李小强,屈盛官,朱德智,李晖云.K417G高温合金大间隙钎焊的组织演变与性能的研究[J].稀有金属材料与工程,2021,50(9):3262-3269.
作者姓名:程准  李小强  屈盛官  朱德智  李晖云
作者单位:华南理工大学 国家金属材料近净成形工程技术研究中心,华南理工大学 国家金属材料近净成形工程技术研究中心,华南理工大学 国家金属材料近净成形工程技术研究中心,华南理工大学 国家金属材料近净成形工程技术研究中心,东莞市精研粉体科技有限公司
基金项目:广东省产学研重大专项(2014B010129002);广东省自然科学基金重点项目(2018B030311051);东莞市引进创新科研团队计划(201536000200027)
摘    要:采用低熔点的含硼镍基合金粉末与高熔点镍基合金粉末的混合粉末作为钎料,在真空热压炉中对K417G镍基高温合金进行大间隙钎焊连接。研究了钎料成分对接头显微组织演变规律的影响,分析了接头的强化机制。结果表明,提高钎料中高熔点合金粉的含量,可有效减少焊缝中硼化物的形成量,提高焊缝组织均匀性。当钎料中高熔点合金粉含量为95 wt.%时,硼元素扩散均匀,获得弥散分布的颗粒状的M3B2 型硼化物,接头的室温和600 °C抗拉强度为971 MPa和934 MPa,达到了母材的强度。此外,原位析出于接头界面处的细小弥散碳硼化物M23(C,B)6与基体的共格关系是实现高质量大间隙钎焊连接的重要因素。

关 键 词:K417G高温合金  大间隙钎焊  钎料  显微组织  抗拉强度
收稿时间:2020/9/29 0:00:00
修稿时间:2020/11/23 0:00:00

Microstructural evolution and mechanical properties of wide gap brazing of K417G superalloy.
Cheng Zhun,Li Xiaoqiang,Qu Shengguan,Zhu Dezhi and Li huiyun.Microstructural evolution and mechanical properties of wide gap brazing of K417G superalloy.[J].Rare Metal Materials and Engineering,2021,50(9):3262-3269.
Authors:Cheng Zhun  Li Xiaoqiang  Qu Shengguan  Zhu Dezhi and Li huiyun
Affiliation:National Engineering Research Center of Near-net-shape Forming for Metallic Materials,South China University of Technology,National Engineering Research Center of Near-net-shape Forming for Metallic Materials,South China University of Technology,National Engineering Research Center of Near-net-shape Forming for Metallic Materials,South China University of Technology,National Engineering Research Center of Near-net-shape Forming for Metallic Materials,South China University of Technology,Dongguan Hyper Tech Co Ltd
Abstract:In recent years, with the development of industrial production, the repair and bonding of wide gaps has always been a key technology. In this study, a gap (width of 20 mm) was bonded by wide gap brazing technology. The K417G superalloy was used as the base metal, and a mixture of low-melting powder (LMP) and high-melting powder (HMP) was used as the filler metal. In this research, K417G superalloy was brazed by different contents of LMP + HMP mixed powder. The microstructure evolution and mechanical properties of joint was analyzed. With increasing the ratio of HMP in the filler metal, the borides in the joint was decreased and the uniformity of composition and microstructure of joint was improved. When the ratio of HMP in the filler metal increased to 95 wt.%, B can be uniformly diffused into the HMP and brittle borides at the interface were significantly reduced. The tensile strength of the joint at room temperature and 600 °C was 971 MPa and 934 MPa, reaching the strength of base metal. In addition, the fine particles of M23(C, B)6 carbon-boride are coherently precipitated in-situ in the joint and uniformly dispersed, facilitating excellent repair.
Keywords:K417G superalloy  Wide gap brazing  Filler metal  Microstructure  Tensile strength
点击此处可从《稀有金属材料与工程》浏览原始摘要信息
点击此处可从《稀有金属材料与工程》下载全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号