Journal of Mechanical Science and Technology

The Korean Society of Mechanical Engineers (대한기계학회)
권호 표지

Thermal and Mechanical Properties of Electro-Slag Cast Steel for Hot Working Tools

  • Moon Young Hoon (Department of Mechanical Engineering/Engineering Research Center for Net Shape and Die Manufacturing Technology, Pusan National University) ;
  • Kang Boo Hyun (Department of Mechanical Engineering, Pusan National University) ;
  • Van Tyne Chester J. (Department of Metallurgical and Materials Engineering, Colorado School of Mines)
  • Published : 2005.02.01
Download PDF
⟨ Previous Next ⟩

Abstract

The thermal and mechanical properties of an electro-slag cast steel of a similar chemical composition with an AISI-6F2 steel are investigated and compared with a forged AISI-6F2 steel. AISI-6F2 is a hot-working tool steel. Electro-slag casting (ESC) is a method of producing ingots in a water-cooled metal mold by the heat generated in an electrically conductive slag when current passes through a consumable electrode. The ESC method provides the possibility of producing material for the high quality hot-working tools and ingots directly into a desirable shape. In the present study, the thermal and mechanical properties of yield strength, tensile strength, hardness, impact toughness, wear resistance, thermal fatigue resistance, and thermal shock resistance for electro-slag cast and forged steel are experimentally measured for both annealed and quenched and tempered heat treatment conditions. It has been found that the electro-slag cast steel has comparable thermal and mechanical properties to the forged steel.

Keywords

References

  1. Baligidad, R. G., Prakash, U. and Krishna, A. R., 1998, 'Effect of Carbon Addition on Structure and Mechanical Properties of Electroslag Remelted Fe-20wt.% Al Alloy,' Material Science and Engineering A, Vol. 249, pp. 97-102 https://doi.org/10.1016/S0921-5093(98)00580-2
  2. Collin, M. and Rowcliffe, D., 2000, 'Analysis and Prediction of Thermal Shock in Brittle Materials,' Acta Materialia, Vol. 48, pp. 1655-1665 https://doi.org/10.1016/S1359-6454(00)00011-2
  3. Dieter, G. E., 1987, Mechanical Metallurgy, 3rd edition, McGraw-Hill, New York, NY, USA
  4. Kim, D. H., Ryu, J. H, Shin, J. H. and Lee, S., 1996, 'Effect of Microstructure on Thermal Fatigue Properties of Roll Materials: I Evaluation of Thermal Fatigue Properties,' Journal of the Korean Institute of Metals and Materials, 34, pp. 29-36. in Korea
  5. Kwon, J. D., Ihn, J. H., Park, J. C. and Choi, S. J., 2002, 'An Evaluation of Cast Stainless Steel (CF8M) Fracture Toughness Caused by Thermal Aging at $430^{\circ}C$,' KSME International Journal, Vol. 16, No.7, pp. 902-910. in Korea
  6. Medovar, B. I., 1989, Special Electrometallurgy : A Review, Harwood Academic Publishers, Chur, Switzerland
  7. Medovar, B. I. and Boiko,G. A., 1991, Electroslag Technology, Springer-Verlag, New York, NY, USA
  8. Moon, Y. H., Kim, J. W. and Van Tyne, C. J., 2003, 'Thermal Shock Resistance of Electro-Slag Cast Steel for Hot Working Tools,' Proceeding of the International Conference on Advances in Materials and Processing Technologies, Dublin, Ireland, July 8-11, pp. 1128-1131
  9. Norstrom, L. A., 1982, 'Performance of Hot-Work Tool Steels,' Scandinavian Journal of Metallurgy, Vol. 11, pp. 33-38
  10. Paton, B. E., Medovar, B. I. and Boiko, G. A., 1980, Electroslag Casting, Naukova Dumka Publishers, Kiev, USSR
  11. Starling, C. M. D. and Branco, J. R. T., 1997, 'Thermal Fatigue of Hot Work Tool Steel with Hard Coatings,' Thin Solid Films, Vol. 308-309, pp.436-442 https://doi.org/10.1016/S0040-6090(97)00600-7