The Influence of Mg Additive on the Structure and Electrical Conductivity of Pure Copper Castings

• Autorzy: Kranc M. , Sikora G. , Górny M. , Garbacz-Klempka A.

Identyfikatory

DOI

10.1515/afe-2017-0135

• Języki publikacji: EN

Abstrakty

EN

The aim of this paper was to attain defect free, pure copper castings with the highest possible electrical conductivity. In this connection, the effect of magnesium additives on the structure, the degree of undercooling (ΔTα = Tα-Tmin, where Tα – the equilibrium solidification temperature, Tmin – the minimum temperature at the beginning of solidification), electrical conductivity, and the oxygen concentration of pure copper castings have been studied. The two magnesium doses have been investigated; namely 0.1 wt.% and 0.2 wt.%. A thermal analysis was performed (using a type-S thermocouple) to determine the cooling curves. The degree of undercooling and recalescence were determined from the cooling and solidification curves, whereas the macrostructure characteristics were conducted based on a metallographic examination. It has been shown that the reaction of Mg causes solidification to transform from exogenous to endogenous. Finally, the results of electrical conductivity have been shown as well as the oxygen concentration for the used Mg additives.

Słowa kluczowe

EN

solidification process; primary grains; pure copper; copper casting; Mg additive; electrical conductivity

PL

proces krzepnięcia; ziarna pierwotne; miedź czysta; odlewanie miedzi; przewodnictwo elektryczne

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2017
• Tom: Vol. 17, iss. 4
• Strony: 85--90
• Opis fizyczny: Bibliogr. 31 poz., rys., tab., wykr.

Twórcy

autor

Kranc M.

• Foundry Research Institute, Zakopiańska 73, 30-418 Kraków, Poland

autor

Sikora G.

• AGH University of Science and Technology, Faculty of Foundry Engineering, Reymonta 23, 30-065 Krakow, Poland

autor

Górny M.

• AGH University of Science and Technology, Faculty of Foundry Engineering, Reymonta 23, 30-065 Krakow, Poland

autor

Garbacz-Klempka A.

• AGH University of Science and Technology, Faculty of Foundry Engineering, Reymonta 23, 30-065 Krakow, Poland

Bibliografia

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Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017).