The Paton Welding Journal, 2018, №05



2018 №05 (02)

DOI of Article 10.15407/tpwj2018.05.03

2018 №05 (04)

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The Paton Welding Journal, 2018, #5, 12-16 pages
 

Properties of steel-copper bimetal produced by brazing in autonomous vacuum

I.P. Serebryanik, M.G. Atroshenko, M.A. Poleshchuk, A.L. Puzrin And A.V. Shevtsov

E.O. Paton Electric Welding Institute of the NAS of Ukraine 11 Kazimir Malevich Str., 03150, Kyiv, Ukraine. E-mail: office@paton.kiev.ua
 
It is determined that brazing of copper on steel under conditions of autonomous vacuum in a contact zone promotes formation of an area of increased microhardness, which is eliminated by standard for steel heat treatment. It is shown that content of carbon in steel does not have significant effect on properties of a copper–steel transition zone. It is stated that interaction of liquid copper with steel does not result in formation of cracks in the joining zone under conditions of brazing in autonomous vacuum. It is determined that increase of time of contact of liquid copper with steel results in formation of brittle structures that decreases joint impact toughness. Failure of steel-copper joint takes place along copper in static tensile tests. At that strength properties of brazed layer exceed reference data for strained and annealed copper. 7 Ref., 2 Tables, 9 Figures.
Keywords: brazing of copper on steel in autonomous vacuum, steel-copper bimetal, structure and properties of transition zone
 
Received:                27.03.18
Published:               07.05.18
 
 
References

1. Atroshenko, M.G., Poleshchuk, M.A., Shevtsov, A.V. et al. (2015) Physical and mechanical properties of transition zone of bimetal produced by autonomous vacuum brazing of copper on steel. The Paton Welding J., 11, 52–56. https://doi.org/10.15407/tpwj2015.11.07
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4. Grin, A.G., Zharikov, S.V., Zalesny, D.I. (2016) Improvement of self-shielding flux-cored wire for welding of copper with steel. Vestnik Gos. Mashinostroit. Akademii, 2(16), 90–95 [in Russian].
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6. GOST 1050–2013: Metal products from non-alloy structural quality and special steels. General specification [in Russian].
7. GOST 10885–85: Sheet hot rolled two-layered corrosion-resistant steel. Specification [in Russian].

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