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Cu-5% Sn 합금의 주조조직에 (鑄造組職) 미치는 도형재의 (塗型材) 영향에 관한 연구
최영승,최창옥 ( Young Sung Choi,Chang Ock Choi ) 한국주조공학회 1985 한국주조공학회지 Vol.5 No.3
This study has been carried out to examine into wettability of Cu-5%Sn alloy in AL₂O₃, MgO, SiO₂and 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 Al₂O₃and MgO were good, on the other hand, wettabilities of SiO₂and graphite were bad. 2. The fine equiaxed zone was created because of the role of Al₂O₃and MgO as preferential nucleation sites. 3. Notwithstanding change of mixing rate of SiO₂in 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 Al₂O₃and MgO in mold-coating.
고 Mn 강 주강품의 내마모성에 미치는 Ni 첨가의 영향에 관한 연구
이영훈,천병욱,김성한,최창옥 ( Young Hun Lee,Byung Wook Cheon,Sung Han Kim,Chang Ock Choi ) 한국주조공학회 1992 한국주조공학회지 Vol.12 No.2
N/A This study has been performed in increase the wear resistance characteristic and the mechanical properties of high Mn steel castings with an addition of Ni to 1∼4% range. The initial structure of plastic cememtite has been possible to transform perfect austenite with watertoughening treatment. Increasing Ni content, the most wear loss has shown that ore has crushed until 100㎏ and decreased with increasing ore amount at ascast, the similar tendency has shown at heat treatment. Chang of hardness has shown high values that ore has been crushed until 300㎏, both as cast and treatment added 2%Ni.
구상흑연주철의 내마모성에 미치는 Sb 및 Sn 의 영향에 관한 연구
권영훈,김창규,김복석,김성한,천병욱,최창옥 ( Young Hoon Kwon,Chang Gyu Kim,Buk Suk Kim,Sung Han Kim,Byung Wook Cheon,Chang Ock Choi ) 한국주조공학회 1991 한국주조공학회지 Vol.11 No.6
N/A The effect of 0.01∼0.10% Sb and Sn on the wear resistance of ductile cast iron was investigated. The hardness was increased with Sb to 0.10%, but the elongation and the impact value were decreased. The tensile strength was increased with up to 0.05% Sb, however decreased with 0.05%∼0.10% Sb. The hardness and the tensile strength were increased and the elongation was decreased with up to 0.10% Sn. The nodularity of graphite was decreased with above 0.08% Sb however Sn had no effect on that. When the maximum compressive stress was low (42㎏.f/㎟), the weigth loss was decreased with increased hardness and when that was high (54㎏.f/㎟ and 65㎏.f/㎟), the weight loss did not depend upon the hardness. The pearlite stabilization with Sb and Sn increased with the wear resistance of ductile cast iron.