Journal of the Korean Society for Heat Treatment (열처리공학회지)

The Korean Society for Heat Treatment (한국열처리공학회)
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The Effects of Thermo-mechanical Treatment on the Thixoforming Process of Cu-Ca Alloys for High Efficiency Electrical Motors

고효율 전동기용 Cu-Ca 합금의 반응고 성형공정에 미치는 가공열처리의 영향

  • Lee, E.Y. (Dept. of Material Science and Engineering, Andong National University) ;
  • Kang, B.M. (Korea Institute of Machinery and Materials) ;
  • Lee, S.Y. (Korea Institute of Machinery and Materials)
  • 이의열 (안동대학교 신소재공학부) ;
  • 강병무 (한국기계연구원 공정연구부) ;
  • 이상용 (한국기계연구원 공정연구부)
  • Received : 2002.07.30
  • Published : 2003.09.30
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Abstract

The effect of the thermo-mechanical treatment on the microstructural development and the electric conductivity of Cu-Ca alloys are studied for the thixoforming processed rotor of the induction motor The Cu-Ca alloys containing Ca less than 1.0wt% show the electrical conductivity higher than 80% IACS They also show broad melting range over $150^{\circ}C$ which is desirable for the thixoforming process The semi-solid microstructure of cast alloy changes from the dendrite structure to globular structure by prior deformation before reheating. The details of microstructural changes by the thermo-mechanical treatment are discussed.

Keywords