ss/δ-Ti2Ni/Tiss/TZM；隨保溫時間的延長,焊縫寬度逐漸變小,其中連續(xù)的Tiss層厚度基本無變化,中間的δ-Ti2Ni層厚度有所降低；同時,TZM母材向焊縫中的溶解量增加。保溫時間較短時,焊縫中殘留有未溶解的TZM塊,延長保溫時間使母材溶解更充分。當保溫時間為10 min時,接頭平均抗剪強度最高為92.6 MPa,斷裂發(fā)生于δ-Ti2Ni層,為脆性沿晶斷裂。"/>

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Ti-28Ni釬料真空釬焊TZM合金接頭界面組織與力學性能
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哈爾濱工業(yè)大學,哈爾濱工業(yè)大學,哈爾濱工業(yè)大學,哈爾濱工業(yè)大學,哈爾濱工業(yè)大學

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TG454

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國家科技重大專項資助(項目號2014ZX04001131),國家自然科學基金資助(項目號51405099)


Interfacial Microstructure and Properties of TZM Alloy Joints Brazed Using Ti-28Ni Filler Metal
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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,State Key Laboratory of Advanced Welding and Joining

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    摘要:

    在釬焊溫度為1040 ℃時,采用Ti-28Ni(質(zhì)量分數(shù),%)釬料實現(xiàn)了TZM合金的真空釬焊連接。采用SEM、EDS等方法分析了接頭界面的微觀組織結(jié)構(gòu),并研究了保溫時間對TZM合金接頭界面結(jié)構(gòu)和性能的影響規(guī)律。結(jié)果表明,接頭的典型界面組織結(jié)構(gòu)為：TZM/Tiss/δ-Ti2Ni/Tiss/TZM；隨保溫時間的延長,焊縫寬度逐漸變小,其中連續(xù)的Tiss層厚度基本無變化,中間的δ-Ti2Ni層厚度有所降低；同時,TZM母材向焊縫中的溶解量增加。保溫時間較短時,焊縫中殘留有未溶解的TZM塊,延長保溫時間使母材溶解更充分。當保溫時間為10 min時,接頭平均抗剪強度最高為92.6 MPa,斷裂發(fā)生于δ-Ti2Ni層,為脆性沿晶斷裂。

    Abstract:

    TZM alloy was successfully brazed using Ti-28Ni as filler metal at 1040℃. The effect of holding time on interfacial microstructure and mechanical properties of brazed joints was studied and the typical microstructure of joint was detected using SEM, EDS. As a result, the typical interfacial microstructure was: TZM/Tiss/δ-Ti2Ni/Tiss/TZM. As increased the holding time, the width of the braze seam decreased, the continuous width of Tiss basically did not change, and the width of central δ-Ti2Ni layer decreased to some extent. Meanwhile, the diffusion of TZM into base materials enhanced. When the holding time was relatively short, there was undissolved TZM block in the weld joints, and the base metal could dissolve thoroughly while extending the holding time. The highest average shear strength of 92.6 MPa was achieved when the holding time was 10 min, and the fracture happened at δ-Ti2Ni layer, which was intergranular brittle fracture.

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田驍,趙洪運,宋曉國,韓桂海,馮吉才. Ti-28Ni釬料真空釬焊TZM合金接頭界面組織與力學性能[J].稀有金屬材料與工程,2018,47(3):927~931.[Tian Xiao, Zhao Hongyun, Song Xiaoguo, Han Guihai, Feng Jicai. Interfacial Microstructure and Properties of TZM Alloy Joints Brazed Using Ti-28Ni Filler Metal[J]. Rare Metal Materials and Engineering,2018,47(3):927~931.]
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  • 收稿日期:2016-03-01
  • 最后修改日期:2016-04-15
  • 錄用日期:2016-04-27
  • 在線發(fā)布日期: 2018-04-11
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