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AgCuNiLi釬焊TiC金屬陶瓷與GH3128界面結(jié)構(gòu)及接頭性能
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哈爾濱工業(yè)大學(xué) 先進(jìn)焊接與連接國家重點實驗室,哈爾濱工業(yè)大學(xué) 先進(jìn)焊接與連接國家重點實驗室,哈爾濱工業(yè)大學(xué) 先進(jìn)焊接與連接國家重點實驗室,哈爾濱工業(yè)大學(xué) 先進(jìn)焊接與連接國家重點實驗室

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中圖分類號:

TG454

基金項目:

國家自然科學(xué)基金項目（面上項目，重點項目，重大項目）


Interfacial microstructure and properties of TiC cermet and GH3128 joint brazed using AgCuNiLi
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State Key Laboratory of Advanced Welding and Joining,Harbin Institute of Technology,State Key Laboratory of Advanced Welding and Joining,Harbin Institute of Technology,State Key Laboratory of Advanced Welding and Joining,Harbin Institute of Technology,State Key Laboratory of Advanced Welding and Joining,Harbin Institute of Technology

Fund Project:

The National Natural Science Foundation of China (General Program, Key Program, Major Research Plan)

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    摘要:

    采用AgCuNiLi釬料對TiC金屬陶瓷與GH3128鎳基高溫合金進(jìn)行釬焊。研究結(jié)果表明：當(dāng)釬焊溫度為840℃,保溫10min時,接頭典型界面結(jié)構(gòu)可以表示為：TiC金屬陶瓷/(Cu,Ni)/Ag(s,s)+Cu(s,s)/(Cu,Ni)/GH3128。隨著釬焊溫度的升高或保溫時間的延長,TiC金屬陶瓷附近的(Cu,Ni)固溶體層厚度增大,且向釬料內(nèi)部呈樹枝狀長大,釬料內(nèi)部的Ag-Cu共晶組織逐漸減少。界面機理分析表明：釬料中Li的加入能促進(jìn)界面上(Cu,Ni)固溶體的形成；但(Cu,Ni)固溶體的繼續(xù)長大則受釬料中Cu元素的擴(kuò)散程度控制。當(dāng)加熱溫度由810℃升高到960℃,接頭抗剪強度呈現(xiàn)先增大,然后緩慢減小的變化趨勢。當(dāng)加熱溫度為880℃、保溫時間為10min時,接頭抗剪強度達(dá)到最大值204MPa。

    Abstract:

    TiC cermet and GH3128 nickel-based superalloy was brazed using AgCuNiLi filler alloy. The results show that the interfacial microstructure of the joint brazed at 840°C for 10min is TiC cermet/(Cu,Ni)/Ag(s.s)+Cu(s.s)/(Cu,Ni)/GH3128. With the increase of temperature and holding time, the (Cu,Ni) solid solution at the TiC cermet side thickens and grows in the form of dendrite crystal; besides, the eutectic microstructure in the brazing alloy decreases. The analysis on the interfacial microstructure shows that the addition of Li in the alloy promotes the forming of the (Cu,Ni) solid solution. However, the continuing growth of the (Cu,Ni) solid solution is controlled by diffusion of the Cu element in the brazing alloy. Shear strength of the joint increases gradually and then decreases slowly with the increase of the brazing temperature. The highest shear strength of 204MPa was obtained when the specimens were brazed at 880°C for 10min.

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引用本文

張麗霞,雷敏,楊智燁,馮吉才. AgCuNiLi釬焊TiC金屬陶瓷與GH3128界面結(jié)構(gòu)及接頭性能[J].稀有金屬材料與工程,2017,46(11):3410~3415.[Zhang Lixia, Lei Min, Yang Zhiye, Feng Jicai. Interfacial microstructure and properties of TiC cermet and GH3128 joint brazed using AgCuNiLi[J]. Rare Metal Materials and Engineering,2017,46(11):3410~3415.]
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  • 收稿日期:2016-09-20
  • 最后修改日期:2016-12-14
  • 錄用日期:2017-01-06
  • 在線發(fā)布日期: 2017-12-13
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