表面镀镍对Ag基钎料钎焊YG6X与GH4169的影响
Effect of Nickel Plating on the Brazing of YG6X and GH4169 with Ag Based Solder
- 2023年53卷第4期 页码:97-102
DOI: 10.7512/j.issn.1001-2303.2023.04.11
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刘攀,钟素娟,裴夤崟,等.表面镀镍对Ag基钎料钎焊YG6X与GH4169的影响[J].电焊机,2023,53(4):97-102.
LIU Pan, ZHONG Sujuan, PEI Yinyin, et al.Effect of Nickel Plating on the Brazing of YG6X and GH4169 with Ag Based Solder[J].Electric Welding Machine, 2023, 53(4): 97-102.
针对AgCuNiMn系钎料在GH4169合金表面的流动性能较弱的问题,在YG6X/AgCuNiMn/GH4169钎焊体系中,通过对比钎料在有无镍镀层的GH4169表面的润湿形貌及最终润湿角的大小,分析了GH4169表面镀镍对钎料在GH4169表面润湿性能的影响;并借助SEM对有镍镀层钎缝组织进行分析,结合接头拉伸性能试验揭示了镀镍层对接头微观组织与力学性能的影响。研究结果表明,在GH4169表面镀镍能显著提高钎料在合金表面的润湿铺展性能,镀镍后AgCuNiMn钎料在合金表面润湿角最小可达4°;在钎料与高温合金界面处存在约20 μm的镍层反应区,该反应区在提高钎料润湿性能的同时一定程度上阻碍了高温合金母材中Fe、Cr与Nb等元素向钎缝区域扩散,从而降低了接头的拉伸强度,平均抗拉强度为631.6 MPa。
In response to the issue of weak flowability of AgCuNiMn filler metal on the surface of superalloys, in the YG6X/AgCuNiMn/GH4169 brazing system, the wetting morphology and final wetting angle of the brazing materials on the GH4169 surface with or without nickel coating were compared, and the effect of nickel plating on the wetting performance of the brazing materials on the GH4169 surface was analyzed; and with the help of SEM, the microstructure of the brazed joint with nickel coating was analyzed, and combined with the tensile performance test results of the joint, the influence of the nickel coating on the microstructure and mechanical properties of the joint was revealed. The study found that nickel plating on the surface of GH4169 can significantly improve the wetting and spreading performance of the solder on the alloy surface. After nickel plating, the minimum wetting angle of AgCuNiMn solder on the alloy surface can reach 4 °, and there is about 20 μm reaction zone at the interface between the solder and the superalloy. The presence of the reaction zone can improve the wettability of the solder and prevent the diffusion of elements such as Fe, Cr, and Nb from the base metal of the superalloy into the solder joint region, thereby reducing the tensile strength of the joint, with an average tensile strength of 631.6 MPa.
真空钎焊润湿性能镀镍高温合金AgCuNiMn系钎料
vacuum brazingwettabilitynickel coatingsuperalloyAgCuNiMn solder
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