Journal of the Korean Society for Heat Treatment (열처리공학회지)

The Korean Society for Heat Treatment (한국열처리공학회)
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Cutting Chip Forms on the Cutting Condition and Tempering Temperatures of Lead-free Brass

무연황동의 절삭 칩 형태에 미치는 절삭조건과 템퍼링 온도의 영향

  • Joo, Y.S. (Dept. of Metallurgical Engineering, Pukyong National University) ;
  • Lee, S.B. (Essentech Co. Ltd.) ;
  • Kim, S.Y. (Dept. of Mechanical Engineering, Pukyong National University) ;
  • Joo, C.S. (Dept. of Chemical Engineering, Pukyong National University) ;
  • Jung, B.H (Dept. of Metallurgical Engineering, Pukyong National University)
  • 주영석 (부경대학교 공과대학 금속공학과) ;
  • 이상봉 ((주)에쎈테크) ;
  • 김시영 (부경대학교 공과대학 기계시스템공학과) ;
  • 주창식 (부경대학교 공과대학 화학공학과) ;
  • 정병호 (부경대학교 공과대학 금속공학과)
  • Received : 2011.12.01
  • Accepted : 2011.12.29
  • Published : 2012.01.30
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Abstract

The effects of cutting condition and tempering temperature for the shape of cutting chip were investigated. For this purpose, a lead-free brass containing 1wt.% of Bi extruded at $750^{\circ}C$ in straight turning was used in this study. The cutting chip preferred was mainly found to be loose form of arc chips with curling discontinuity, and these were formed by shear fracture. However, some of fragmental element chip were found to be mixed when tempering temperature was as high as $500^{\circ}C$. The form and size of chip was more affected by feed rate than by tempering temperature and cutting rate. In addition, the cutting surface was observed to be formed more rough in the case of high feed rate and low cutting rate compared to low feed rate and high cutting rate.

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References

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