열처리공학회지 (Journal of the Korean Society for Heat Treatment)
- 제3권2호
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- Pages.10-19
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- 1990
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- 1225-1070(pISSN)
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- 2508-4046(eISSN)
고주파표면 경화 처리된 0.45% 탄소강의 템퍼링 거동
Tempering Behavior of 0.45% Carbon Steel Treated by a High Frequency Induction Hardening Technique
- Shim, J.J. (Kia Precision Works Technical Center) ;
- Lee, S.Y. (Department of Metallurgical Engineering, Dong-A University)
- 발행 : 1990.06.30
초록
The tempering behavoirs of 0.45% carbon steel treated by automatic progressive high frequency induction hardening equipment have been investigated. In order to examine the correlation of hardness with both tempering temperature and time, simple regression analysis has been made using the statistical quality control package. The maximum surface hardness value of induction hardened zone and its effective hardening depth have been determined to be Hv 810 and 0.76mm, respectively. The hardness obtained after tempering has been shown to vary lineary with tempering time at six different temperatures. The activation energies during tempering have been calculated to be 25.34kcal/mole, 32.73kcal/mole and 49.24kcal/mole for HRcs 60, 50 and 40, respectively, showing that tempering process occurs by a complex mechanism, The tempering hardness equation of
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