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pISSN : 1598-706X / eISSN : 2288-8381


(논문)연구논문

한국주조공학회지 (5권3호 185-192)

Effect of Mold Coatings on the Macrostructures of Cu-5%Sn Alloy

Cu-5% Sn합금(合金)의 주조조직(鑄造組織)에 미치는 도형재(塗型材)의 영향(影響)에 관(關)한 연구(硏究)

Young- Sung CHOI, Chang- Ock CHOI

Dong-A University

Abstract

This study has been carried out to examine into wettability of Cu-5%Sn alloy in Al_2O_3, MgO, SiO_2 and graphite, respectively and investigated into the change in macrostructure of Cu-5%Sn alloy according to kind and mixing rate of mold-coating. The results obtained from the experiment are summerized as follows; 1. Cu Cu-5%Sn alloy, wettabilities of Al_2O_3 and MgO were good, on the other hand, wettabilities of SiO_2 and graphite were bad. 2. The fine equiaxed zone was created because of the role of Al_2O_3 and MgO as preferential nucleation sites. 3. Notwithstanding change of mixing rate of SiO_2 in mold coating the equixed zone was not created. 4. The area of equiaxed zone was varied according to mixing rate in the case of using Al_2O_3 and MgO in mold-coating.

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