Uzlov K.
Doctor of Technical Science, Professor of Materials Science Department,
National Metallurgical Academy of Ukraine, Dnipro, Ukraine
Repiakh S.
Doctor of Technical Science, Professor of Foundry Department, National
Metallurgical Academy of Ukraine, Dnipro, Ukraine
Mazorchuk V.
Candidate of Technical Science (PhD), Associated Professor (Docent) of Foundry
Department, National Metallurgical Academy of Ukraine, Dnipro, Ukraine
Dziubina A.
Post Graduate Student of Materials Science Department, National Metallurgical
Academy of Ukraine, Dnipro, Ukraine
PHASE COMPOSITION, STRUCTURE AND MECHANICAL
PROPERTIES OF INDUSTRIAL BRONZE BrA9Zh3L
ADDITIONALLY DOPED WITH ZINC
Introduction. Ukraine in the ranking of copper and its alloys castings suppliers
is confidently included in the top ten [1]. Steel Founders’ Society of America analysts
believe [1] that in period from 2008 to 2020, copper alloys castings production will
increase by + 76%. One of the main consumers of copper casting is machine building,
in particular the industry of electric vehicles producing. Today it’s looking like the
2020s will be electric car decade [2].
According to BHP Billiton prognosis, till 2035
number of electric vehicles will increase by 11,500% [3]. By 2040, according to
Bloomberg New Energy Finance (BNEF), in the world new cars market, the share of
electric vehicles will be 35% [2]. In means, in nearest future intensive growth of
demand for electrotechnical copper and its alloys only for automotive industry is
expected. This because the fully electric car uses four times more copper than average
car with a gasoline or diesel engine [3].
Hence, rising of copper and its alloys consumption with limited resources of raw
material base will necessarily lead to the need of products from them reliability and
durability increasing. Therefore, investigations are devoted to mechanical properties of
copper alloys parts (in particular bronzes), as well as their reliability and durability in
operation increasing and stabilizing are relevant.
1. Material and Methods. The objects of this study were tin-free foundry bronzes
BrA9Zh3L as per GOST 493 [4] (0,0 … 1,0 wt. %) and such bronzes additionally
doped with zinc in amounts: > 1.0 ... 5.0 wt. %.
Metallographic analysis was performed on mechanically prepared and etched by
3.5 g chlorine iron + 25 ml HCl ethyl alcohol solution micro specimens [5, 6].
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