한국기계가공학회지 (Journal of the Korean Society of Manufacturing Process Engineers)

  • 제16권6호
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  • Pages.87-94
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  • 2017
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  • 1598-6721(pISSN)
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  • 2288-0771(eISSN)
한국기계가공학회 (The Korean Society of Manufacturing Process Engineers)
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실사이드 부품의 롤포밍공정에서 고주파유도가열 부가조건에 따른 기계적 특성 및 미세조직 평가

Characteristics of Mechanical Properties and Micro Structure according to High-Frequency Induction Heating Conditions in Roll Forming Process of a Sill Side Part

  • Kim, Kun-Young (Graduate school of convergence science, Pusan National University) ;
  • Choy, Lee-Jon (Graduate school of convergence science, Pusan National University) ;
  • Shin, Hyun-Il (New Technology department, Sewon Corp, Ltd) ;
  • Cho, Jun-Haeng (New Technology department, Sewon Corp, Ltd) ;
  • Lee, Chang-Hoon (New Technology department, Sewon Corp, Ltd) ;
  • Kang, Myung Chang (Graduate school of convergence science, Pusan National University)
  • 투고 : 2017.11.14
  • 심사 : 2017.11.28
  • 발행 : 2017.12.31
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초록

Hot stamping processes are possible for tensile strength 1.4 GPa but the strength reduction is appeared from the cooling performance unbalance. And the strength of roll forming process is below than that of hot stamping process owing to using the steel which is lower strength of boron steel. In this study, We provide roll forming process asssisted high-frequency induction heating to solve the problem of conventional one. The experiments were carried out at under various sill side part conditions: high-frequency induction heating conditions of 15, 18, 21, 24, 27 and 30 kW. The high-frequency induction heating temperature was checked with Infrared camera and the sill side parts of mechanical properties and microstructure were measured. The heating temperature of high frequency induction was measured to max $850^{\circ}C$ under the coil power of 30 kW. The tensile strength was 1.5 GPa and hardness was 490 Hv. The martensite structure was discovered under coil power of 30 kW. The weight of steel material sill side having thickness 1.5 mm and the boron steel sill side having thickness 1.2 mm were compared to weight effect. The boron steel sill side reduced 11.5% compared to steel. Consequently, manufacturing process of 1.5 giga-grade's sill side part was successfully realized by the roll forming assisted high-frequency induction heating methods.

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참고문헌

  1. Kim, K. Y., Kwak, S. H., Han, G. D., Park, J. S., Cho, J. H., Lee, C. H., Kang, M. C., "Formability Evaluation with the Vacuum Resin Transfer Molding of a CFRP Composite Automobile Seat Cross Part," Journal of the Korean Society of Manufacturing Process Enginee Vol. 16, No. 3, pp. 24-29, 2017.
  2. Han, B. J., Jeong. Y. C., Hwang. K. H., Kang, M. C., "Performance and Feasibility Evaluation of Straight-Type Mixing Head in High-Pressure Resin Transfer Molding Process of Carbon Fiber Reinforced Composite Material," Journal of the Korean Society of Manufacturing Process Enginee, Vol. 16, No. 5, pp. 157-65, 2017. https://doi.org/10.14775/ksmpe.2017.16.5.157
  3. Kang, H., Kyoung, W. M., "Structural Design Optimization of the Aluminum Space Frame Vehicle," Transactions of KSAE, Vol. 16, No. 1, pp. 175-180, 2008.
  4. Zhou, J., Wan, X., Li, Y., "Advanced aluminium products and manufacturing technologies applied on vehicles presented at the EuroCarBody conference" Materials Today: Proceedings, Vol. 2, Issue 10, pp. 5015-22, 2015. https://doi.org/10.1016/j.matpr.2015.10.091
  5. Son, H. J., Kim, S. Y., Oh, B. S., Kim, K. S., "Development of Vehicle Door Side Impact Beam with High Tensile Steel using Roll Forming Process," Journal of the Korean Society of Manufacturing Process Enginee, Vol. 11, No. 6, pp. 82-87, 2012.
  6. Jung, D. W., Kim, D. H., Kim, B. C., "A Study on Development of Automotive Panel of Bumper Reinforcement with High Strength Steel Using Roll Forming Process," Jorunal of the Korean Society for Precision Engineering, Vol. 29, No. 8, pp. 840-844, 2012. https://doi.org/10.7736/KSPE.2012.29.8.840
  7. Lee, I. K., Lee, S. Y., Lee, S. K., Ahn, M. S., "Trimless Blank Design for Hot Stamping Process of a Sill Side," Journal of the Korean Society of Manufacturing Process Enginee, Vol. 15, No. 5, pp. 93-99, 2016.
  8. Kum, J., Park. O., Hong, S., "Tough High Thermal-Conductivity Tool Steel for Hot Press Forming," J. of KSMPE, Vol. 15, NO. 3, pp. 130-134, 2016. https://doi.org/10.14775/ksmpe.2016.15.3.130
  9. Han, S. S., "Formability Test of Boron Steel Sheet at Elevated Temperature for Hot Stamping" Transactions of Materials Processing," Vol. 26, No. 2, pp. 121-125, 2017. https://doi.org/10.5228/KSTP.2017.26.2.121
  10. Merklein, M., Lechler, J., Geiger, M., "Characterisation of the Flow Properties of the Quenchenable Ultra High Strength Steel 22MnB5," CIRP Annals - Manufacturing Technology, Vol. 55, No. 1, pp. 229-232, 2006. https://doi.org/10.1016/S0007-8506(07)60404-1
  11. Mori, K., Bariani, P. F., Behrens, B. A., Brosius, A., Bruschi, S., Maeno, T., Merklein, M., Yanagimoto, J., "Hot stamping of ultra-high strength steel parts," CIRP Annals - Manufacturing Technology, Vol 66, 755-777, 2017. https://doi.org/10.1016/j.cirp.2017.05.007
  12. http://global-autonews.com/skin/board/global_basic/print.php ?bo_table=bd_013&wr_id=752
  13. Jeon, H. B., Song, T. H., Park, H. J., "Surface Hardening Characteristics of High Carbon Steel using High Frequency Induction Hardening," Proceedings of KSME, Vol. 2007, No 11, pp. 74-80, 2007.
  14. Choi, Y. G., Cho, W. S., Jang. W. Y., "Effect of Prior Structure on the Martensitic Transformation in an Fe-Cr-C Steel," Jorunal of Advanced Engineering and Technology, Vol. 2, No 1, pp. 171-176, 2009.
  15. Lee, D. H., Yoon, C. S., and Lim, J. D., "Mechanical Properties of High Stength Sheet Steels for Auto-Body by Induction Heat Treatment," Jorunal of the Korean Society for Heat Treatment, Vol. 17, No. 2, pp. 73-77, 2004.

피인용 문헌

  1. Smart Roll Forming Based on Real-Time Process Data vol.17, pp.5, 2018, https://doi.org/10.14775/ksmpe.2018.17.5.045
  2. Effect on Drive Point Dynamic Stiffness and Lightweight Chassis Component by using Topology and Topography Optimization vol.17, pp.3, 2018, https://doi.org/10.14775/ksmpe.2018.17.3.141