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Die Life Estimation of Hot Forging for Surface Treatment and Lubricants  

이현철 (부산대학교 일반대학원)
김병민 (부산대학교 정밀 정형 및 금형가공 연구센)
김광호 (부산대학교 무기재료공학과)
Publication Information
Journal of the Korean Society for Precision Engineering / v.20, no.7, 2003 , pp. 26-35 More about this Journal
Abstract
This study explains the effects of lubricant and surface treatment on hot forging die life. The mechanical and thermal load, and thermal softening which is happened by the high temperature of die, in hot and warm forging, cause die wear, heat checking and plastic deformation, etc. This study is fur the effects of solid lubricants and surface treatment condition for hot forging die. Because cooling effect and low friction are essential to the long life of dies, optimal surface treatment and lubricant are very important to improve die life for hot forging process. The main factors, which affect die hardness and heat transfer, are surface treatments and lubricants, which are related to thermal diffusion coefficient and heat transfer coefficient, etc. For verifying these effects, experiments are performed for hot ring compression test and heat transfer coefficient in various conditions as like different initial billet temperatures and different loads. The effects of lubricant and surface treatment for hot forging die life are explained by their thermal characteristics. The new developed technique in this study for predicting tool life can give more feasible means to improve the tool life in hot forging process.
Keywords
Surface treatment; Graphite lubricant; Heat transfer coefficient; Tool life; Tempering parameter; Plastic deformation; Wear model;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 Lange, K., 'Modern metal forming technology for industrial production,' Journal of Materials Processing Technology, Vol. 71, pp. 2-13, 1997   DOI   ScienceOn
2 Olivier Brucelle, Gerard Bernhart, 'Methodology for service life increase of hot forging tools,' Journal of Materials Processing Technology, Vol. 87, pp. 237-246, 1999   DOI   ScienceOn
3 Choi, J. C, Kim, B. M., Kim, S. W., 'Computer-Aided Process Planning and Die Design for Hot Forging of H-Shaped Plane Strain Components,' Journal of the Korean Society of Precision Engineering, Vol. 11, No. 2, Apr, 1994   과학기술학회마을
4 Hiroyuki Saiki, 'Tribology in Warm and Hot Forming,' JSTP International Seminar on Precision Forging, 1997
5 Saiki, H., Marumo, Y., Minami, A., Sonoi, T., 'Effect of the surface structure on the resistance to plastic deformation of a hot forging tool,' Journal of Materials Processing Technology, Vol. 113, pp. 22-27, 2001   DOI   ScienceOn
6 Lee, J. H., Kim, D. J., Kim, B. M., Kim, H. K., 'Wear Analysis of Hot Forging Die Consideration Thermal,' Transactions of Materials Processing, Vol. 9, No. 1, pp. 43-51, 2000
7 P. H. Hansen, N. Bay, 'A flexible computer based system for prediction of wear distribution in forming tools,' Advanced Technology of Plasticity, Vol. 1, pp. 19-26, 1990
8 Kim, T. H., Kim, B. M., Choi, J. C, 'Prediction of die wear in the wire-drawing process,' Journal of Materials Processing Technology, Vol. 65, pp. 11-17, 1997   DOI   ScienceOn
9 Burte, P. R., Im, Y. T. and Altan, T., 'Measurement and Analysis of Heat Transfer and Friction During Hot Forging,' Trans. ASME, Journal of Engineering for Industry, Vol. 112, pp. 332-339, Nov. 1990   DOI
10 Jeong, D. J., Kim, D. J., Kim, J. H., Kim, B. M., Dean, T. A., 'Effects of surface treatments and lubricants for warm forging die life,' Journal of Materials Processing Technology, Vol. 113, pp. 544-550,2001   DOI   ScienceOn
11 Dean, T. A., Silva, T. M., 'Die Temperatures During Production Drop Forging,' Journal of Engineering for Industry, Vol. 101, pp. 385-390, 1979   DOI
12 湯淺紘二, 岡本治郞, '溫間鍛造用 金型の壽命におけろプレスライドモ-ツョンの影響についての考察', 塑性と加工, Vol. 22, No. 241, pp. 133-138,1981
13 Archard, J. F., 'Contact and rubbing of flat surfaces,' Journal of Applied Physics, pp. 981-988, 1953   DOI