Influence features of alloying elements on structure and phase transformation in solder alloy of Cu−Mn−Fe−Ni−Si system

Authors

  • V. K. Nosenko G.V. Kurdyumov’s Institute of Metal Physics, Ukraine
  • G. P. Brekharya G.V. Kurdyumov’s Institute of Metal Physics, Ukraine
  • V. Z. Balan G.V. Kurdyumov’s Institute of Metal Physics, Ukraine
  • T. Yu. Nikolayeva JSC “Motor Sich”, Ukraine https://orcid.org/0000-0002-5481-024X

Keywords:

solder, alloying element, phase transformations, the differentially-thermal analysis, extrusion

Abstract

Purpose. In connection with development of branches of mechanical engineering, aircraft building and rocket production the soldering of stainless steels and heat resisting alloys gains special value. Improvement of the soldering process goes by the way of working out of new solders and fluxes, reduction of precious metals content, such as silver,  and also researching of optimum environments and soldering methods. The most perspective for this purpose by results of fatigue tests of joints are solders on the copper-manganese base. Methodology. In this work researching of phase structure  of Cu−Mn alloys with a different variation of the alloying elements Fe, Ni, Si content has been carried out by methods of metallography, DTA and SEM analyses as well cast (original) alloys as after extrusion; also ranges of phase transformation have been defined. Findings. Investigations of influence of alloying elements on properties and characteristics of solder from Сu-Мn alloy are resulted in this research. It is revealed that for decreasing of the solder melting temperature it is necessary to increase the content of manganese and silicon to 30 and 3 % respectively at the iron content within 1,5…3 %. More iron content does not raise strength of soldered product considerably, but thus can reduce fluidity of the solder. By results of the differentially thermal analysis, temperatures for extrusion process of the solder alloy are defined. Rolling does not lead to the phase composition change of initial alloys. Practical value. The result of the done work can be used for determination of an optimum content of solder material, which satisfies to technological requirements of the soldering process.

Author Biographies

V. K. Nosenko, G.V. Kurdyumov’s Institute of Metal Physics

Department of Crystallography, Dr. Sc. (Phys./Math.), Prof.

G. P. Brekharya, G.V. Kurdyumov’s Institute of Metal Physics

Department of Crystallography, Dr. Sc. (Phys./Math.), Prof.

V. Z. Balan, G.V. Kurdyumov’s Institute of Metal Physics

Department of Crystallography, Sc. Res.

T. Yu. Nikolayeva, JSC “Motor Sich”

Management Chief Metallurgist, engineer

References

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Published

2016-06-12