Structure and Mechanical Properties of Cu-Alloyed Cast Iron

Abstract:

The effect of Cu addition on structure and mechanical properties of the gray cast iron is studied. Copper is showed to affect the graphitization process. Copper content increase up to 6 ... 7 wt. % reduces the depth of the chill layer.With further increase of coppercontent the alloys tendency to chilling effectincreases.When the cast ironcontains from 0 to ~ 7% Cu, inclusions can’t be detected using only optical microscopy. In the cast iron with 14.7% Cu, distribution of inclusions has two peaks: 30 ... 40 ... 150 microns and 160 microns. Out-of-shape cupric inclusions of the size of ~ 1 micron are detected in the ledeburite cementite.Submicron inclusions are observed in the lamellar pearlite colonies. With increase of copper content up to ~ 7 wt. % cast iron hardness and microhardness of pearlite increases.

• Periodical: Applied Mechanics and Materials (Volume 682)
• Pages: 178-182
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.682.178
• Online since: October 2014
• Authors: N.V. Stepanova, A.A. Razumakov, Е.A. Lozhkina
• Keywords: Bronze, Graphite, Gray Cast Iron, Microhardness, Nanoparticle, Structure

References

[1] E.D. Golovin, V.A. Kuznecov, V. Kumar, P.A. Popeljuh, N.V. Stepanova, Effect of copper on the friction properties of gray cast iron (in Russian), Obrabotka metallov, 1, 54 (2012) pp.81-84.

[2] N.V. Stepanova, A.A. Razumakov, The effect of doping with copper and aluminium on structure, mechanical and friction properties of steel, The 8 international forum on strategic technologies (IFOST 2013): proc., Mongolia, Ulaanbaatar, 2013. Vol. 1. – pp.240-242.

DOI: 10.1109/ifost.2013.6616977

[3] S. Jeon, S. Kim, I. Lee, J. Park, K. Kim, J. Kim, Y. Park, Effects of copper addition on the formation of inclusions and the resistance to pitting corrosion of high performance duplex stainless steels, Corrosion Science 53 (2011) p.1408–1416.

DOI: 10.1016/j.corsci.2011.01.005

[4] Bobro Ju.G. Cast iron alloyed with aluminum, Har'kov, HGU, 1964. -195 p.

[5] Silman G.I. On the mechanisms of copper effect оn structure formation in cast iron / G.I. Silman, V.V. Kamynin, V.V. Goncharov /Metal Science and Heat Treatment Vol. 49, Nos. 7 – 8, 2007 – pp.387-393.

DOI: 10.1007/s11041-007-0072-z

[6] Bobro Ju.G., Platonova L.A. Some features of the copper-doped aluminum cast iron, V kn.: Novoe v metallografii chuguna (New to the cast iron metallography), Kiev: 1981. pp.94-99.

[7] N.P. Ljakishev, State diagrams of metallic systems (in Russian). Handbook 1996, Vol. 1, 992 p.