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材料工程  2017, Vol. 45 Issue (5): 86-93    DOI: 10.11868/j.issn.1001-4381.2016.001397
  研究论文 本期目录 | 过刊浏览 | 高级检索 |
镍基钎料钎焊K465高温合金大间隙接头组织与性能研究
潘晖, 赵海生
北京航空材料研究院 焊接与塑性成形研究所, 北京 100095
Research on Microstructure and Mechanical Properties of Wide-gap Brazed Joints of K465 Superalloy Using Nickel-base Brazing Filler Metal
PAN Hui, ZHAO Hai-sheng
Welding and Plastic Forming Division, Beijing Institute of Aeronautical Materials, Beijing 100095, China
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摘要 K465镍基高温合金为母材,FGH95镍基合金粉为预填粉末,采用预填高熔点粉末的方法对0.5mm大间隙接头进行钎焊,研究不同保温时间对钎缝组织与接头性能的影响。结果表明:1220℃保温0.5h获得的钎缝组织由合金粉颗粒及颗粒间的相构成,颗粒内为γγ'两相组织,颗粒间为γγ'两相为基体的硼化物、硅化物及γ+γ'共晶组织;随钎焊保温时间延长,合金粉颗粒长大,化合物相及γ+γ'共晶组织合并、总量减少;钎焊保温时间为0.5~16h时,接头平均持久寿命由31.59h提高至54.58h,但不易获得高性能等温凝固接头。
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潘晖
赵海生
关键词 钎焊K465镍基高温合金组织力学性能    
Abstract:The joint clearance with 0.5mm was brazed with pre-filled high-melting powder method, by using K465 nickel-base superalloy as base metal, FGH95 nickel-base superalloy powder as pre-filled powder. The effects of different holding time on microstructure and mechanical properties were investigated. The results show that the brazing seam microstructure of the joints brazed at 1220℃ for 0.5h composes of alloy powder particles and phases among the particles. The microstructure is a two-phase structure of γ and γ' inside the powder particles, and among the particles are γ and γ' two-phase based borides, silicides and γ+γ' eutectics. With the increase of holding time, the powder particles grow bigger, the compounds and γ+γ' eutectics merge together, leads to the decrease of the amount of compounds and γ+γ'eutectics. The holding time is prolonged from 0.5h to 16h, the average rupture life increases from 31.59h to 54.58h, but it is not easy to achieve the isothermally solidified joints with good mechanical properties.
Key wordsbrazing    K465 nickel-base superalloy    microstructure    mechanical property
收稿日期: 2016-11-23      出版日期: 2017-05-17
中图分类号:  TG454  
通讯作者: 潘晖(1969-),女,高级工程师,硕士,研究方向:航空材料钎焊与扩散焊,联系地址:北京市81信箱20分箱(100095),E-mail:panhui23@gmail.com     E-mail: panhui23@gmail.com
引用本文:   
潘晖, 赵海生. 镍基钎料钎焊K465高温合金大间隙接头组织与性能研究[J]. 材料工程, 2017, 45(5): 86-93.
PAN Hui, ZHAO Hai-sheng. Research on Microstructure and Mechanical Properties of Wide-gap Brazed Joints of K465 Superalloy Using Nickel-base Brazing Filler Metal. Journal of Materials Engineering, 2017, 45(5): 86-93.
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http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2016.001397      或      http://jme.biam.ac.cn/CN/Y2017/V45/I5/86
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