Tempering Heat Treatment Effects on Steel Welds
- 1 Materials Science and Engineering Department, Obafemi Awolowo University, Ile-Ife,Nigeria
- 2 Materials Science and Engineering Department, Obafemi Awolowo University, Ile-Ife,Nigeria
- 3 Mechanical Engineering Department, University of Ibadan, Ibadan, Nigeria
Abstract
This paper reports investigations made on the tempering heat treatment effects on steel welds. The properties of the weld investigated were hardness value and toughness. Micro examination of the samples was also done with optical microscopy. Four (4) different grades of steel rods in 10mm diameter were obtained. The range of the carbon contents of the steel rods was from 0.16 wt% C to 0.33 wt % C. From each grade of the steel materials, grooved specimen of about 150 mm were prepared. The grooves were then filled to create welds using arc welding. A set of the resulting welds were then subjected to tempering heat treatment. The hardness values and toughness of the welds were determined. The microstructural analyses of the welds were carried out as well. The results show that hardness and toughness were dependent on the carbon content. There was also significant microstructural modification due to heat treatment.
- AWS 1997 American Welding Society welding Handbook, 8th ed. New York.
- IIW 1988 International Institute of Welding, Guidelines for the classification of ferrite steel weld metal microstructure constituents using the light microscopy, International Institute of Welding, IIW DOC. IX-1533-88.
- Adedayo, A.V., Ibitoye, S.A., Oyetoyan, O.A. 2010 Annealing Heat Treatment Effects on Steel Welds. Journal of Mineral, Materials Characterization and Engineering, Vol. 9, No. 6 pp 547-557.
- da Trindade Filho V.B., A.S. Guimaraes, J. da C. Payao Filho, R.P. da R. Paranhos 2004 Normalizing heat treatment effects on low alloy steel weld metals. Journal of Brazilian Society of Mechanical Sciences and Engineering, Vol. 26., No. 1
- Grong, O. 1992 Microstructure and properties of steel weld metals in : D.L. Olson and T.H. North (eds. ) Ferrous Alloys Weldments Transaction Technical Publications. Pp 21-46.
- Evans, G.M. 1991 The effects of Nickel on microstructure and properties of C-Mn allweld metal deposits. Welding Research Abroad, 37, Vol. 41
- Adedayo, A.V. 2009 Effects of Carbon Content on Steel Welds. Journal of Research in Technology and Engineering Management, Vol. 2, No. 1 pp131-135
- Higgins, R.A. 1998 Properties of engineering materials, 2nd ed., Viva books, Private Ltd, New Delhi.
- Brophy, J.H., Rose, R.M.; Wulff J., 1964 The structure and properties of materials, thermodynamics, vol.2, John Wiley and Sons, Brisbane, pp 113-114, 188-189
- Rajan, T.V.; Sharma C.P.; Sharma A. 1988 Heat treatment principles and techniques; prentice-Hall of India, Private Ltd. New Delhi, pp289.
- Rajput, R.K. 2006 Engineering materials and metallurgy, 1st ed. S. Chand & Co. New Delhi. pp. 66
- DeGarmo, E.P.; Black, J.T.; Kosher, R.A. 2003 Material and Processes in Manufacturing 9th ed. John Wiley and Sons, New York, pp 84
- DeGarmo, E.P.; Black, J.T.; Kosher, R.A. 1999 Material and Processes in Manufacturing 8th ed. John Wiley and Sons, New York, pp 112