Journal of the Korean Society for Heat Treatment (열처리공학회지)

The Korean Society for Heat Treatment (한국열처리공학회)
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Mechanical and Physical Property Changes of Cu-Ni-Si-Sn-Fe-P Copper Alloy System According to the Heat Treatment Conditions

열처리조건에 따른 Cu-Ni-Si-Sn-Fe-P 석출경화형 동합금계의 물성변화 특성

  • Kim, Seung-Ho (School of Mechanical Engineering, University of Ulsan) ;
  • Yum, Young-Jin (School of Mechanical Engineering, University of Ulsan)
  • 김승호 (울산대학교 공과대학 기계공학부) ;
  • 염영진 (울산대학교 공과대학 기계공학부)
  • Received : 2012.07.15
  • Accepted : 2013.08.29
  • Published : 2013.09.30
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Abstract

The influence of aging treatment, addition elements and rolling reduction ratio on the microstructure, mechanical, electrical and bendability properties of Cu-Ni-Si-P-x (x = Fe, Sn, Zn) alloys for connector material application was investigated. SEM/EDS analysis exhibited that Ni2-Si precipitates with a size of 20~100 nm were distributed in grains. Fe, Sn, Zn elemnets in Cu-Ni-Si-P alloy imporved the mechanical strength but it was not favor in increasing of electrical conductivity. As higher final rolling reduction ratio, the strength and electrical conductivity is increased after aging treatment, but it indicated excellent bendability. Especially, Cu-2Ni-0.4Si-0.5Sn-0.1Fe-0.03P alloy show the tensile strength value of 700MPa and the electrical conductivity was observed to reach a maximum of 40%IACS. It is optimal for lead frame and connector.

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References

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