Static Strain Aging Behavior of Low Carbon Steel Drawn Wire

Document Type: Research Paper

Authors

1 Sharif University of Technology

2 sharif University of Technology

Abstract

The static strain aging is a phenomenon that can change the mechanical properties of low carbon steels. Thus, the static strain aging behavior of low carbon steel wires after drawing process is studied. To do so, the wires are austenitized at different temperatures and cooled in different rates. Then the wires are drawn and aged at a specific temperature and time. Before and after aging of each drawn wire, the hardness distribution at its cross section is measured. The increase in hardness due to aging is called aging index. The results show that the hardness of drawn wire is increased from center to surface of its cross section. However, after aging the hardness is decreased from center to surface. In addition, with increasing the austenitizing temperature, the index is increased. Also, with increasing the cooling rate, the index is decreased. Moreover, the aging index is decreased from center to surface.

Keywords


[1] E. O. Hall, Yield Point Phenomena in Metals and Alloys. 1st ed., (1970), NewYork: Macmillan.
[2] D. A. Porter and K. E. Easterling, Phase Transformation in Metals and Alloys. 2nd ed. (1992), UK: Chapman & Hall.
[3] A. Karimi Taheri, T. M. Maccagno and J. J. Jonas, Effect of cooling rate after hot rolling and of multistage strain aging on the drawability of low-carbon steel wire rod, Met. Trans. A. 26, (1995), 1183.
[4] T. Altan, S. I. Oh and H. L. Gegel, Metal Forming, 1st ed. (1983). USA: ASM.
[5] M. S. Rashid, Strain aging kinetics of vanadium or titanium strengthened high-strength low-alloy steels, Met. Trans. A, 7, (1976), p. 497.
[6] Ch. R. Brooks, Principles of the Austenitization of Steels. 1st ed. (1992), England: Elsevier.
[7] W. Hasford and R. Caddle, Metal Forming: Mechanics and Metallurgy, 3rd ed. (2007). NewYork: Cambridge University Press.
[8] K. J. Irvin and F. B. Pickering, Low-carbon steels with ferrite-pearlite structures, J. Iron. Steel. Inst. 201, (1963), p. 944.
[9] R. Philips and J. A. Chapman, Influence of finish rolling temperature on the mechanical properties of some commercial steels rolled to 13/16 in diameter bars, J. Iron. Steel. Inst. June, 615 (1966).