소성∙가공 (Transactions of Materials Processing)

  • 제22권1호
  • /
  • Pages.11-16
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  • 2013
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  • 1225-696X(pISSN)
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  • 2287-6359(eISSN)
한국소성∙가공학회 (The Korean Society for Technology of Plasticity and materials processing)
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롤러 레벨링 공정시 후판의 잔류응력 예측 - Part II : 가속냉각 모델을 통합한 모델

Prediction of the Residual Stress for a Steel Plate after Roller Leveling - Part II : Integrated Model with Accelerated Cooling Model

  • Ye, H.S. (Department of Mechanical Engineering, POSTECH) ;
  • Hwang, S.M. (Department of Mechanical Engineering, POSTECH)
  • 투고 : 2012.12.07
  • 심사 : 2013.01.22
  • 발행 : 2013.02.01
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초록

Despite its importance the control of roller leveling has primarily relied on the operator's experience and on operation tables. In order to effectively eliminate various shape defects, the optimal leveling condition for a specific mode of plate deformation needs to be determined as well as a careful evaluation as to whether or not the condition is still appropriate for other modes or not. A numerical model, which considers both computation efficiency and accuracy, has been developed. The variations of residual stress are studied according to the entry and the delivery intermeshes, respectively. The camber deformation decreases linearly as the entry intermesh increases. In contrast the curl deformation does not vary directly with the entry intermesh. Therefore, the optimum intermesh values need to be determined in order to simultaneously minimize both the camber and the curl deformation.

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참고문헌

  1. J. M. Koo, S. R. Ryoo, C. S. Lee, C. G. Sun, H. N. Han, S. M. Hwang, 2007, Prediction of Residual Stresses in a Plate Subject to Accelerated Cooling, ISIJ Int., Vol. 47, No. 8, pp.1149-1158. https://doi.org/10.2355/isijinternational.47.1149
  2. P. C. M. Rodrigues, E. V. Pereloma, D. B. Santos, 2000, Mechanical Properities of an HSLA Bainitic Steel Subjected to Controlled Rolling with Accelerated Cooling, Mater. Scil. Eng., A, Vol. 283, No. 1-2, pp. 136-143. https://doi.org/10.1016/S0921-5093(99)00795-9
  3. A. B Cota, R Barbosa, D. B Santos, 2000, Simulation of the Controlled Rolling and Accelerated Cooling of a Bainitic Steel using Torsion Testing, J. Mater. Process. Technol., Vol. 100, No. 1-3, pp. 156-162. https://doi.org/10.1016/S0924-0136(99)00467-7
  4. S. J. Chen, A. A. Tseng, 1992, Spray and Jet Cooling in Steel Rolling, Int. J. Heat Fluid Flow, Vol. 13, No. 4, pp. 358-369. https://doi.org/10.1016/0142-727X(92)90006-U
  5. S. R. Ryoo, 2008, Effects of Intermesh on the Curl Deformation of Heavy Plates, CAMP-ISIJ, Vol. 13, No. 9, p. 1174.
  6. Y. K. Kim, W. J. Kwak, T. J. Shin, S. M. Hwang, 2010, A New Model for the Prediction of Roll Force and Tension Profiles in Flat Rolling, ISIJ Int., Vol. 50, No. 11, pp. 1644-1652. https://doi.org/10.2355/isijinternational.50.1644