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焊接溫度和保溫時(shí)間對Ni-14Cr-10P-xTi釬料焊接C/C復(fù)合材料組織和性能的影響
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中南大學(xué) 粉末冶金國家重點(diǎn)實(shí)驗(yàn)室

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Effect of welding temperature and holding time on microstructure and properties of Ni-14Cr-10P-xTi brazing filler C/C composites
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Powder Metallurgy Research Institute, Central South University

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    摘要:

    用真空熔煉、惰性氣體霧化的方法制備Ni-14Cr-10P金屬粉末，再加入Ti粉和高分子聚合物高速攪拌分散制備了Ni-14Cr-10P-xTi膏狀活性釬料。用制備的焊膏在真空釬焊爐中釬焊C/C復(fù)合材料，然后測試了釬焊接頭的剪切強(qiáng)度，采用SEM、EDS、XRD等方法對接頭微觀組織進(jìn)行了分析。結(jié)果表明，在釬焊溫度1000℃，保溫時(shí)間30min時(shí)，接頭獲得了最高的剪切強(qiáng)度，然后隨著釬焊溫度的上升、保溫時(shí)間延長，釬焊接頭強(qiáng)度下降；添加Ti元素加快了釬焊強(qiáng)度隨溫度和保溫時(shí)間的增加而下降的速度，結(jié)合微觀組織結(jié)構(gòu)，本文對Ti元素加入后釬焊強(qiáng)度隨溫度和保溫時(shí)間增加而下降更為迅速的原因進(jìn)行了分析。

    Abstract:

    Ni-14Cr-10P metal powder was prepared by vacuum melting and inert gas atomization, and then Ti powder and polymer paste were added and stirred at high speed to prepare Ni-14Cr-10P-xTi paste active solder. The C/C composites were welded in the vacuum brazing furnace with the prepared active solder paste, and then the welded joint shear strength was tested. The microstructure and mechanical properties of the joints were investigated by SEM, EDS and XRD. The results show that the strength of the welded joint decreases with the increase of welding temperature and the holding time；The addition of Ti accelerates the decrease of welding strength with temperature and holding time. Combined with the microstructure, the reason why the welding strength decreases with the increase of temperature and holding time after the addition of Ti element is analyzed.

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易振華,冉麗萍,易茂中.焊接溫度和保溫時(shí)間對Ni-14Cr-10P-xTi釬料焊接C/C復(fù)合材料組織和性能的影響[J].稀有金屬材料與工程,2020,49(1):361~369.[Yi ZhenHua, Ran LiPing, Yi MaoZhong. Effect of welding temperature and holding time on microstructure and properties of Ni-14Cr-10P-xTi brazing filler C/C composites[J]. Rare Metal Materials and Engineering,2020,49(1):361~369.]
DOI：10.12442/j. issn.1002-185X.20181272

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  • 收稿日期:2018-12-21
  • 最后修改日期:2019-03-25
  • 錄用日期:2019-04-10
  • 在線發(fā)布日期: 2020-02-16
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