Korean Journal of Metals and Materials (대한금속재료학회지)

The Korean Institute of Metals and Materials (대한금속재료학회)
권호 표지

A Study on the Traditional Forged High Tin Bronzes and the Rivet Joints in Korea

한국의 전통 방짜유기와 이에 사용된 리벳에 관한 연구

  • Lee, Jae Sung (Department of Metallurgical Engineering, Hongik University) ;
  • Kim, Won Soo (Department of Metallurgical Engineering, Hongik University) ;
  • Park, Jang Sik (Department of Metallurgical Engineering, Hongik University)
  • 이재성 (홍익대학교 조치원캠퍼스 금속공학과) ;
  • 김원수 (홍익대학교 조치원캠퍼스 금속공학과) ;
  • 박장식 (홍익대학교 조치원캠퍼스 금속공학과)
  • Received : 2007.10.16
  • Published : 2008.01.22
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Abstract

Examination of two bronze vessels supposedly from the Koryo dynasty revealed that they consist of bowls and stands that are fixed together using rivet joints made of Cu-Ag alloys. The bowls and stands were forged out of unleaded bronze alloys of approximately 22 weight % Sn before being quenched from the ${\alpha}+{\beta}$ region of the Cu-Sn phase diagram. This specific alloy and the thermo-mechanical treatment constitute two key elements of the unique technical tradition called Bangcha (방짜) that has long been established in Korea. The high Sn content ensures better casting and the thermal treatment causes the brittle ${\delta}$ phase to be avoided in forging as well as in services. The experiment on the laboratory Cu-Ag alloys of varying Ag contents suggested that the Cu-Ag system was the best choice of materials for the rivets at the time in view of their color, availability, ductility and low melting points.

Keywords

Acknowledgement

Supported by : 홍익대학교

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