Microstructure Analysis of Brazing Interface between Haynes 214 Alloy and GH5188 Alloy

XU Yanqiang; MEI Han; MA Guanglu; LIU Yue; DONG Jiapeng; ZHAO Wanqi; GUO Wei; LONG Weimin; GUO Wei

doi:10.3969/j.issn.1674-6457.2025.06.008

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Journal of Netshape Forming Engineering ›› 2025, Vol. 17 ›› Issue (6) : 74-81. DOI: 10.3969/j.issn.1674-6457.2025.06.008

Precision Brazing

Microstructure Analysis of Brazing Interface between Haynes 214 Alloy and GH5188 Alloy

XU Yanqiang^1,2, MEI Han¹, MA Guanglu¹, LIU Yue¹, DONG Jiapeng¹, ZHAO Wanqi¹, GUO Wei², LONG Weimin^3*, GUO Wei⁴

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Abstract

The work aims to study the erosion of the brazing interface between Haynes 214 alloy and GH5188 alloy with different filler metals. To meet the welding needs of Haynes 214 alloy honeycomb and GH5188 alloy plates, the brazing process tests were conducted with three different brazing filler metals of HBCo51CrNiSiW, HBNi71CrSi and B-Ni73CrSiB-40Ni-S and the microstructure and composition of the brazing interface were analyzed. When B-Ni73CrSiB-40Ni-S was adopted as the brazing filler metal, the brazing interface microstructure showed good uniformity and no signs of erosion were observed. When HBCo51CrNiSiW and HBNi71CrSi were used as filler metals, the erosion was found at the root of the Haynes 214 alloy honeycomb, and the degree of erosion caused by the HBCo51CrNiSiW filler metal to the Haynes 214 alloy honeycomb was more severe. Further analysis revealed that this erosion was mainly due to element diffusion between the brazing filler metal and the base metal during the high-temperature brazing process. The Si element in the filler metal continuously diffused into the base metal, forming a low-melting eutectic phase with the base metal, resulting in the erosion of the base metal. Based on the above analysis, B-Ni73CrSiB-40Ni-S brazing filler metal exhibits superior performance in welding Haynes 214 alloy honeycomb and GH5188 alloy plates, effectively preventing the occurrence of base metal erosion.

Key words

Haynes 214 alloy / honeycomb / GH5188 alloy / brazing erosion / nickel-based filler metal / cobalt-based filler metal

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XU Yanqiang, MEI Han, MA Guanglu, LIU Yue, DONG Jiapeng, ZHAO Wanqi, GUO Wei, LONG Weimin, GUO Wei. Microstructure Analysis of Brazing Interface between Haynes 214 Alloy and GH5188 Alloy[J]. Journal of Netshape Forming Engineering. 2025, 17(6): 74-81 https://doi.org/10.3969/j.issn.1674-6457.2025.06.008

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