The Paton Welding Journal, 2003, №07

2003 №07 (03)

2003 №07 (05)

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The Paton Welding Journal, 2003, #7, 16-18 pages

Structure of brazed joints in high nickel alloys produced by using arc heating

V.F. Khorunov, S.V. Maksymova, I.V. Zvolinsky

E.O. Paton Electric Welding Institute of the NASU 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine.

Abstract
Structure, chemical heterogeneity and microhardness of structural components of brazed joints made by using arc heating and adhesion-active brazing filler alloys of the Ni-Cr-Zr system were studied. The use of brazing filler alloys of optimal composition and appropriate techniques was found to provide deposited metal of low hardness and avoidance of cracking of the brazed weld and the HAZ. Application of composite brazing filler alloys was proved to be most promising for repair of blades of unweldable superalloys with a high (over 60 %) content of the ′-phase.
Keywords: high nickel alloys, superalloys, ′-phase, arc heating, brazed joint, deposited metal, brazing filler alloy, composite brazing filler alloy, microstructure, cracks

References

1. Jahnke, B. (1982) High-temperature electron beam welding of nickel-base superalloy 1N-738LC. Welding J., Nov., 343–347.
2. Haafkens, M.H., Matthev, J.H.G. (1982) A new approach to the weldability of nickel-base as-cast and powder metallurgy superalloys, Ibid., 25–30.
3. Koren, A., Roman, M., Weisshaus, I. et al. (1968) Improving the weldabilitv of Ni-base superallovs 713C. Ibid., Nov., 348–351.
4. Khorunov, V.F., Ukader, E.M. (1991) Principles for development of eutectic filler metals lor heat-resistant nickel alloy brazing. In: Proc. of Int. Conf. on Joining Welding, Hague, July 1–2, 1991. Oxford: Pergamon Press.
5. Khorunov, V.F., Ivapchenko, V.G., Kvasnitskij, V.V. (1998) Investigation of Ni-Cr-Zr and Ni-Cr-Hf alloys. In: Proc. of Int. Conf on Soldering, Brazing and Diffusion Bonding, Aachen, May, 1998. Aachen.
6. Khorunov, V., Maksymova, S., Samokhin, S. et al. (2000) Brazing filler alloy containing Zr and Hf as depressants. In: Proc. of 3rd Int. Conf. on High Temperature Capillarity, Kurashiki, Nov. 19–22, 2000. Osaka.

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Suggested Citation

V.F. Khorunov, S.V. Maksymova, I.V. Zvolinsky (2003) Structure of brazed joints in high nickel alloys produced by using arc heating. The Paton Welding J., 07, 16-18 .

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