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材料工程  2015, Vol. 43 Issue (5): 21-26    DOI: 10.11868/j.issn.1001-4381.2015.05.004
  材料与工艺 本期目录 | 过刊浏览 | 高级检索 |
CuMnNiCo钎料钎焊MGH956合金接头组织及力学性能研究
李小强, 敖敬培, 李子阳, 李力, 屈盛官
华南理工大学 国家金属材料近净成形工程技术研究中心, 广州 510640
Microstructure and Mechanical Property of MGH956 Superalloy Joint Brazed with CuMnNiCo Filler Metal
LI Xiao-qiang, AO Jing-pei, LI Zi-yang, LI Li, QU Sheng-guan
National Engineering Research Center of Near-net-shape Forming for Metallic Materials, South China University of Technology, Guangzhou 510640, China
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摘要 采用自制的CuMnNiCo钎料对氧化物弥散强化(ODS)合金MGH956进行钎焊实验,分析了钎焊过程中各种组织的形成过程,研究了不同的钎焊温度对接头组织和性能的影响.结果表明:在1000~1050℃保温20min工艺下钎焊MGH956合金,均可获得良好的钎焊成形效果,钎焊接头由钎缝中心区的Cu-Mn基固溶体和两侧扩散反应区的Fe-Mn基固溶体组成,并含有三种不同的化合物相.钎焊温度为1030℃和1050℃时,接头的室温拉伸断裂发生在钎缝中心处,断口主要呈沿晶脆性断裂特征.钎焊温度的提高使沿晶界分布的脆性(Mn,Ni)-Si相减少,有利于改善钎焊接头强度,钎焊接头的室温抗拉强度最高可达到母材强度的75%.
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李小强
敖敬培
李子阳
李力
屈盛官
关键词 ODS合金钎焊铜基钎料接头组织    
Abstract:CuMnNiCo filler metal was developed to braze MGH956 oxide dispersion strengthened (ODS) superalloy. The microstructural evolution was analyzed during brazing. The effects of different brazing temperatures on microstructures and properties of the joints were investigated. The results show that sound joints can be obtained at 1000-1050℃ for 20min. The brazing joints consist of Cu-Mn based solid solution in the central zone of brazed seam and Fe-Mn based solid solution at the diffusion reaction zone of both sides of brazed seam, with formation of three different compounds. When brazed at 1030℃/1050℃, the room temperature (RT) tensile fracture of the joints occurs at the center of seam, exhibits mainly the intergranular brittle fracture feature. By increasing the brazing temperature to reduce (Mn,Ni)-Si brittle phase distributed along the grain boundary, the strength of brazed joints can be improved. The RT tensile strength of joint reaches up to about 75% of the base material.
Key wordsODS superalloy    brazing    copper based filler metal    joint microstructure
收稿日期: 2013-08-07     
1:  TG454  
通讯作者: 李小强(1972-),男,教授,博士生导师,主要从事异种金属材料连接及粉末冶金方面研究,联系地址:广东省广州市五山路华南理工大学机械与汽车工程学院(510640),Lixq@scut.edu.cn     E-mail: Lixq@scut.edu.cn
引用本文:   
李小强, 敖敬培, 李子阳, 李力, 屈盛官. CuMnNiCo钎料钎焊MGH956合金接头组织及力学性能研究[J]. 材料工程, 2015, 43(5): 21-26.
LI Xiao-qiang, AO Jing-pei, LI Zi-yang, LI Li, QU Sheng-guan. Microstructure and Mechanical Property of MGH956 Superalloy Joint Brazed with CuMnNiCo Filler Metal. Journal of Materials Engineering, 2015, 43(5): 21-26.
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