| Title |
Casting & Cu-Ca Alloy and Thixoforming Precess Design for High Efficient Rotor |
| Authors |
이상용(Sang Yong Lee); 문영훈(Young Hoon Moon); 이혜경(Hyae Kyung Yi) |
| ISSN |
1738-8228(ISSN), 2288-8241(eISSN) |
| Keywords |
Thixoforming; STMA process; Cu-Ca alloy; electrical conductivity; rotor |
| Abstract |
The melting range, electrical conductivity, and microstructure of Cu-Ca alloys and thixoforming process design of developed Cu-Ca alloy were investigated. High purity calcium was added to molten copper up to 1.4% by weight. SIMA(Strain induced melting activated) process has been carried out to modify the copper dendrites to spherical shapes. The semisolid range, grain size and electrical conductivity of Cu-Ca alloy were significantly influenced by the content of calcium and prestrain. Thixoforming experiment of developed Cu-Ca alloy were performed. Efficiency of rotor was negative influenced by internal defects. Thixoformed Cu-Ca rotor shows high efficiency to that of die cast Al rotor by optimization of forming process. |