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焊接温度和保温时间对Ni-14Cr-10P-xTi钎料焊接C/C复合材料组织和性能的影响
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中南大学 粉末冶金国家重点实验室

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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:

    用真空熔炼、惰性气体雾化的方法制备Ni-14Cr-10P金属粉末,再加入Ti粉和高分子聚合物高速搅拌分散制备了Ni-14Cr-10P-xTi膏状活性钎料。用制备的焊膏在真空钎焊炉中钎焊C/C复合材料,然后测试了钎焊接头的剪切强度,采用SEM、EDS、XRD等方法对接头微观组织进行了分析。结果表明,在钎焊温度1000℃,保温时间30min时,接头获得了最高的剪切强度,然后随着钎焊温度的上升、保温时间延长,钎焊接头强度下降;添加Ti元素加快了钎焊强度随温度和保温时间的增加而下降的速度,结合微观组织结构,本文对Ti元素加入后钎焊强度随温度和保温时间增加而下降更为迅速的原因进行了分析。

    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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易振华,冉丽萍,易茂中.焊接温度和保温时间对Ni-14Cr-10P-xTi钎料焊接C/C复合材料组织和性能的影响[J].稀有金属材料与工程,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
  • 录用日期:2019-04-10
  • 在线发布日期: 2020-02-16
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