Journal of the Korean Society for Heat Treatment (열처리공학회지)

The Korean Society for Heat Treatment (한국열처리공학회)
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A Study on the Coolingability of Sodium Aqueous Solutions by Quenching

퀜칭시 나트륨계 수용액의 냉각성능에 관한 연구

  • Kim, Ok Sam (Dept. of Mechanical Engineering, Yosu National Fisheries University) ;
  • Choi, Eun Soon (Dept. of Mechanical Engineering, lnha University Graduate School) ;
  • Min, Soo Hong (Dept. of Mechanical Engineering, Inha University)
  • 김옥삼 (여수수산대학 기계공학과) ;
  • 최은순 (인하대학교 기계공학과) ;
  • 민수홍 (인하대학교 기계공학과)
  • Published : 1992.12.31
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Abstract

Coolingability of coolants is important factor in cooling processor heat treatment of steel. Using standard apparatus and method defined in the Korean Industrial Standard three different shapes of probe were designed, ie, cylinderical, spherical and square on shape with same volume of standard probe. Distilled water and sodium aquious solutions with different concentration of NaOH, NaCl and $Na_2CO_3$ were examined. Estimation of coolingability of each quenchants for the probes of cylinderical, spherical or square shape, the cooling rate is greater square, cylinder and sphere in order. Coolingability of sodium aquious solution of NaCl, $Na_2CO_3$ and NaOH is found generally greater then that of distilled water. Effectiveness of ingredients is in the order of $Na_2CO_3$, NaOH and NaCl. In both solutions coolingability increases in 20%, 5%, and 10%in order. Analytical results obtained from Finite Element Method were compared with experimental ones and found as practically satisfactional.

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