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A study on the prediction of the angular distortion in line heating with high frequency induction heating

고주파 유도가열을 이용한 선상가열 시 각 변형 예측에 관한 연구

  • Received : 2015.01.09
  • Accepted : 2015.02.27
  • Published : 2015.02.28

Abstract

The purpose of this study is to establish the predictive method of the angular distortion caused by the line heating process with high frequency induction heating. In order to do it, the heat input model for the high frequency induction heating system was established through comparing the temperature evaluation results obtained by both FEA and experiment. The critical heating conditions to prevent the degradation of the work piece with various thicknesses were identified by FEA and microstructure test results. Under the critical heating conditions, the extensive line heating tests were performed. According to the test results, it was found that the angular distortion behavior of the heated plates could be defined as the function of heat intensity and the rigidity of heated plate. In addition, it was clarified that the angular distortion strongly depended on the size of test specimen such as the length and the width of the heated plate. Based on these results, the predictive equation for the angular distortion was established with the function of heat intensity, bending rigidity and size of heated plate.

Keywords

Line heating;High frequency induction heating;Angular distortion;Size effect

References

  1. H. T. Lee, S. B. Shin : A Study on the angular distortion and shrinkage by line heating, Proceedings of the 2010 Annual Meeting of KWJS, 162-163 (in Korean)
  2. S. B. Shin, D.J. Lee, K. K. Kim, J. G. Yoon : Effect of line heating variables for forming the curved plate on the behavior f distortion, Proceedings of the 2005 Annual Meeting of KWJS, 291-293 (in Korean)
  3. D. J. Lee, S. B. Shin : A Study on inductive coil design to control longitudinal distortion of built-up T bar, Proceedings of the 2001 Annual Meeting of KWJS, 260-262 (in Korean)
  4. Vander Voort, George F.: Atlas of time-temperature diagrams for iron and steels, (1991), 309
  5. S. B. Shin, H. K. Jin, D.J. Lee : A study on effect of the heated plate size on the distortion acaused by line heating, Proceedings of the 2010 Annual Meeting of KWJS, 148 (in Korean)

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