• Title/Summary/Keyword: Loose arc chip

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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.;Lee, S.B.;Kim, S.Y.;Joo, C.S.;Jung, B.H
    • Journal of the Korean Society for Heat Treatment
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    • v.25 no.1
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    • pp.14-21
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    • 2012
  • 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.