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http://dx.doi.org/10.7777/jkfs.2012.32.2.091

Influence of Bismuth and Antimony Additions on the Structures and Casting Properties of Lead-free Cu-Zn-Sn Bronze Castings  

Park, Heung-Il (Department of Materials System Engineering, Graduate School, Pukyung National University)
Park, Sung-Ik (Department of Materials System Engineering, Graduate School, Pukyung National University)
Kim, Sung-Gyu (Department of Materials System Engineering, Graduate School, Pukyung National University)
Publication Information
Journal of Korea Foundry Society / v.32, no.2, 2012 , pp. 91-97 More about this Journal
Abstract
The effects of Bi and Sb additions on the microstructures and casting properties in lead-free Cu-Zn-Sn broze were investigated. (1) When only Bi was added to the bronze, Bi was precipitated on the ${\delta}$ phase of ${\alpha}$ dendrite cell boundary. When Bi and Sb were added together, Bi was precipitated on the ${\delta}_A$ which was the Sb-rich area in the ${\delta}$ phase. (2) The addition of Sb accelerated the formation of ${\delta}$ phase, and when Sb, Bi and Pb were added, Bi and Pb were precipitated as mixed solution in the ${\delta}_A$ phase. (3) The combined addition of Sb and Bi resulted in the suppression of shrinkage due to the complementary effects of the mass feeding of ${\alpha}$-dendrite cluster covered with ${\delta}$ phase and sealing of micro-shrinkage in the ${\delta}$ phase by solidification expansion of Bi.
Keywords
Lead-free; Bronze Castings; Bi and Sb additions;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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