Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
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A Study on Hot Deformation Behavior of Bearing Steels

베어링강의 고온변형 특성에 관한 연구

  • 문호근 (FAG한화베어링㈜ 연구소) ;
  • 이재성 (FAG한화베어링㈜ 연구소) ;
  • 유선준 (포스코㈜ 기술연구소 후판연구팀) ;
  • 전만수 (경상대학교 기계항공공학부)
  • Published : 2003.04.01
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Abstract

In this paper, the stress-strain curves of bearing steels at hot working conditions are obtained by hot compression test with a computer controlled servo-hydraulic Gleeble 3800 testing machine and elongations and reductions of area of the bearing steels are also obtained by hot tensile test with a Gleeble 1500 testing machine. Experiments are conducted under the various strain-rates and temperatures and their results are used to obtain the flow stress information. A rigid thermo-viscoplastic finite element method is applied to the multi-stage hot forging process in order to predict temperature distribution of workpiece. The experimental results and the analysis results are used to obtain an optimal hot forging condition.

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References

  1. Moon, H. K., Chung, J. H., Yoo, S. J., Joun, M. S., 2001, 'Analysis of Internal or External Crack of Bearing Steel during Hot Forging Process,' The KSTP 6th Forging Symposium, pp. 9-20
  2. Altan, T., Boulger, F. W., 1973, 'Flow Stress of Metals and Its Application in Metal Forming Analyses,' Trans. ASME Journal of Engineering for Industry, pp. 1009-1019
  3. Rao, K. P., Hawbolt, E. B., 1992, 'Development of Constitutive Relationships Using Compression Testing of a Medium Carbon Steel,' Trans. ASME. Journal of Engineering Materials and Technology, Vol. 114, pp. 116-123 https://doi.org/10.1115/1.2904131
  4. Rao, K. P., Prasad, Y. K. D. V., Hawbolt, E. B., 1996, 'Hot Deformation Studies on a Low-Carbon Steel : Part I - Flow Curves and the Constitutive Relationship,' Journal of Materials Processing Technology, Vol. 56, pp. 897-907 https://doi.org/10.1016/0924-0136(95)01902-2
  5. Rae, K. P., Prasad, Y. K. D. V., Hawbolt, E. B., 1996, 'Hot Deformation Studies on a Low-Carbon Steel : Part 2 - An Algorithm for the Flow Stress Determination under Varying Process Conditions,' Journal of Materials Processing Technology, Vol. 56, pp. 908-917 https://doi.org/10.1016/0924-0136(95)01903-0
  6. Xia, X., Sakaris, P. and McQueen, H. J., 1994, 'Hot Deformation, Dynamic Recovery and Recrystallization Behavior of Aluminum 6061-SiCp Composites,' Mater. Sci. and Technol., Vol. 10, pp, 487-496 https://doi.org/10.1179/mst.1994.10.6.487
  7. Ko, B. C., Kim, J. H., Yoo, Y. C., 1998, 'The Effects of Temperature and Strain Rate on Flow Stress and Strain of AA5083 Alloy during High Temperature Deformation,' Official Journal of KSTP, Transactions of Materials Processing, Vol. 7, No.2, pp. 168-176
  8. Ko, B. C., Kim, J. H., Yoo, Y. C., 1998, 'High Temperature Deformation Behavior of Al 5083 Alloy Using Deformation Processing Maps,' Official Journal of KSTP, Transactions of Materials Processing, Vol. 7, No.5, pp. 450-458
  9. Lee, K. S., Huh, H., 1997, 'Characterization of superplastic material SPF 8090 Al-Li with the variation of the strain rate and the temperature,' Official Journal of KSTP, Transactions of Materials Processing, Vol. 6, No.5, pp. 425-434
  10. Choi, M. S., Kang, B. S., Yum, J. T., Park, N. K., 1998, 'Prediction of the Behavior of Dynamic Recrystallization in Inconel 718 during Hot Forging using Finite Element Method,' Official Journal of KSTP, Transactions of Materials Processing, Vol. 7, No.3, pp. 197-206
  11. Han, H. K., Kim, S. I., Yoo, Y. C., 2000, 'Prediction on Flow Stress Curves and Microstructure of 304 Stainless Steel,' Official Journal of KSTP, Transactions of Materials Processing, Vol. 9, No. I, pp. 72-79
  12. Han, H. K .. Kim, S. I., lung, T. S., Yoo, Y. C., 2000, 'Effects of Process Variables on Static and Metadynamic Softening of SCM 440,' Official Journal of KSTP, Transactions of Materials Processing, Vol. 9, No. 1, pp. 80-87
  13. Han, H. K., Yoo, Y. C., 2001, 'The Evolution of Dynamically Recrystallized Microstructure for SCM 440,' Official Journal of KSTP, Transactions of Materials Processing, Vol. 10, No. I, pp. 35-41
  14. Bang, W., Lee, C. S., Chang, Y. W., 2001, 'Analysis of Hot Forming Process with Flow Softening by Dynamic Recrystallization,' Official Journal of KSTP, Transactions of Materials Processing, Vol. 10, No.2, pp. 137-143
  15. Bang, W., Jung, J. Y., Chang, Y. W., 2001, 'The Effect of Deformation Heat Compensation in the Hot Forging Analysis of SAF 2507 Stainless Steel,' Official Journal of KSTP, Transactions of Materials Processing, Vol. 10, No.3, pp. 206-213
  16. Jeong, H. S., Cho, J. R., Chao, D. J., Bae, Y. B., 2001, 'A Study on Dynamic and Static Recrystallization Behaviors and Microstructure Evolution Prediction of a Die Steel,' Official Journal of KSTP, Transactions of Materials Processing, Vol. 10, No.4, pp. 338-346
  17. Joun, M. S., Moon, H. K., Shivpuri, R., 1998, 'Automatic Simulation of a Sequence of Hot-Former Forging Processes by a Rigid-Thermoviscoplastic Finite Element Method,' Trans. ASME, Journal of Engineering Materials and Technology, Vol. 120, pp. 291-296 https://doi.org/10.1115/1.2807016
  18. Rebelo, N., and Kobayashi, S., 1980 'A Coupled Analysis of Viscoplastic Deformation and Heat Transfer-II. Applications,' Int. J. Mech. Sci., Vol. 22, pp. 707-718 https://doi.org/10.1016/0020-7403(80)90073-9
  19. Kobayashi, S., Oh, S. I. and Altan, T., 1989, Metal Forming and the finite Element Method, Oxford University Press
  20. Cho, J. R., Park, C. Y. and Yang, D. Y., 1992, 'Investigation of the Cogging Processes by Three-Dimensional Thermo-Viscoplastic Finite Element Analysis,' Proc. Instn. Mech. Engrs., Vol.206, pp. 277-286 https://doi.org/10.1243/PIME_PROC_1992_206_084_02
  21. Joun, M. S., Hwang, S. M., Moon, H. K., 1995, 'Automatic Computer Simulation of Multi-Stage Hot Forging Processes-Flow Analysis, Temperature Analysis and Die Stress Analysis,' Proc. KSME Spring, Vol. 1, pp. 337-340