한국소성가공학회:학술대회논문집 (Proceedings of the Korean Society for Technology of Plasticity Conference)

한국소성∙가공학회 (The Korean Society for Technology of Plasticity and materials processing)
권호 표지

SK85 고탄소강의 구상화 거동

Spheroidization Behavior of SK85 High Carbon Steel

  • 하태권 (강릉원주대학교 금속재료공학과) ;
  • 김근준 (강릉원주대학교 금속재료공학과) ;
  • 나길환 (강릉원주대학교 금속재료공학과)
  • Ha, T.K. (Dept. of Metal and Materials Engineering, Kangnung-Wonju National University) ;
  • Kim, K.J. (Dept. of Metal and Materials Engineering, Kangnung-Wonju National University) ;
  • Na, G.H. (Dept. of Metal and Materials Engineering, Kangnung-Wonju National University)
  • 발행 : 2009.10.08
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초록

In the present study, the effect of initial microstructure, cold reduction ratio, and annealing temperature on the spherodization rate of SK85 high carbon steel sheet was investigated. High carbon steel sheet fabricated by POSCO was soaked at $800^{\circ}C$ for 2 hr in a box furnace and then treated at $570^{\circ}C$ for 5 min in a salt bath furnace followed by water quenching to obtain a fine pearlite structure. Cold rolling was conducted on the sheets of fine pearlite by reduction ratios of 20, 30, and 40% and heat treatment for spheroidization was carried out at 600 and $720^{\circ}C$ for the various time intervals from 0.1 to 32 hrs. Area fraction of spheroidized cementite was measured with an image analyzer as a function of cold reduction ratios and duration times.

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