Hastelloy X高温合金活性扩散钎焊接头的微观结构

杨斯楠; 刘岩; 丁坤英; 王志平

doi:10.12073/j.hj.20190820001

Hastelloy X高温合金活性扩散钎焊接头的微观结构

1. 中国民航大学天津民用航空器适航与维修重点实验室, 天津 300300;
2. 中国科学院上海硅酸盐研究所, 上海 201800

基金项目:

中国民航大学天津市民用航空器适航与维修重点实验室开发基金资助项目(2017SW05)

详细信息

作者简介:
杨斯楠,1994年出生,硕士研究生;主要从事焊接和热处理研究.

通讯作者:
王志平,1963年出生,博士,教授

中图分类号: TG454
计量
- 文章访问数: 24
- HTML全文浏览量: 9
- PDF下载量: 24
出版历程
- 收稿日期: 2019-08-19

Microstructure of Hastelloy X superalloy’s joints by activated diffusion brazing

1. Civil Aviation University of China, Tianjin Key Laboratory of Civil Aircraft Airworthiness and Maintenance, Tianjin 300300, China;
2. Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201800, China

摘要

摘要: 采用Ni-Cr-Fe基钎料对Hastelloy X高温合金进行了活性扩散钎焊。通过扫描电镜、能谱分析、X射线衍射等测试手段分析了接头微观结构和相组成，并且研究不同焊接温度和保温时间对接头微观结构演变的影响。结果表明，焊接接头主要包括凝固区、扩散区和基体区，其中凝固区主要由γ固溶体和复杂硼化物M₃B₂(M=Cr，Mo)组成;而扩散区则由γ固溶体和3种不同形态的Cr，Mo的硼化物组成。随着焊接温度的升高和保温时间的延长，扩散区晶内析出的硼化物逐渐减少，同时在晶间处的析出相增多。在1 170℃，30 min条件下，接头的最大硬度出现在凝固区的析出相位置，约为406 HV1。
- Hastelloy X /
- 活性扩散钎焊 /
- 微观结构 /
- 显微硬度
Abstract: Hastelloy X superalloy was bonded with Ni-Cr-Fe based brazing filler metal by activated diffusion brazing(ADB). Microstructure and phase composition of brazed joints were analyzed by scanning electron microscopy,energy dispersive spectrometer and X-ray diffraction,and effects of brazing temperatures and holding times on microstructure evolution of brazed joints were investigated. The results showed that the brazed joint mainly includes solidification zone,diffusion zone and base material. The solidification zone was mainly composed of γ solid solution phase and complex boride M₃ B₂(M=Cr,Mo),while the diffusion zone was made up of γ solid solution phase and three different forms of Cr and Mo borides. With the increase of brazing temperature and the extension of holding time,the number of boride precipitated in the grain interior of the diffusion zone gradually decreased,while the number of precipitating phase increased at the grain boundary. The maximum hardness value of the joint bonded at 1 170℃ for 30 min appeared at the position of precipitation phase in the solidification zone,which was about406 HV1.
- Hastelloy X /
- activated diffusion brazing /
- microstructure /
- microhardness

HTML全文

参考文献(8)

[1]	刘悦,熊建坤,赵海燕,等.Hastelloy X和Haynes 230激光焊接头的组织性能[J].焊接学报,2017,38(8):82-86.
[2]	刘平,顾小龙,贺艳明,等.采用金箔钎焊连接石墨与Hastelloy N合金[J].焊接学报,2018,39(9):109-112.
[3]	李小强,程准,邱昊,等.镍基高温合金焊接修复技术的研究进展[J].材料导报,2017,31(29):541-545.
[4]	Su C Y,Chou C P,Chang W J,et al.Effect of mechanical properties using different filler metals on wide-clearance activated-diffusion-brazed Ni-based superalloy[J].Journal of Material Engineering and Performance,2000,9(6):663-668.
[5]	Lugscheider E,Ferrara S,Janssen H,et al.Progress and developments in the field of materials for transient liquid phase bonding and active soldering processes[J].Microsystem Technologies,2004,10(3):233 -236.
[6]	Arafin M A,Medraj M,Turner D P,et al.Transient liquid phase bonding of Inconel 718 and Inconel 625 with BNi-2:modeling and experimental investigations[J].Materials Science and Engineering A,2007,447(1-2):125-133.
[7]	Ghasemi A,Pouranvari M.Intermetallic phase formation during brazing of a nickel alloy using a Ni-Cr-Si-Fe-B quinary filler alloy[J].Science and Technology of Welding and Joining,2018,24(4):342-351.
[8]	Ghasemi A,Pouranvari M.Microstructure evolution mechanism during brazing of Hastelloy X superalloy using Ni-Si-B filler metal[J].Science and Technology of Welding and Joining,2017,23(5):441-448.