Effect of Thermal-Mechanical Treatment on Texture and Properties of Cold-Drawn Steel Wire

Abstract:

Thermal–mechanical treatment is widely utilized by steelmakers to optimize the properties of high–strength cold drawing eutectoid steel wires. This paper presents the influence of industrial thermal–mechanical treatment utilized in practical manufacturing on microstructure and mechanical properties of drawn pearlitic steels. After post thermal–mechanical processing, drawn pearlitic steel features lower residual stress and improved yield/ultimate tensile strengths, and exhibits a more perfect fiber texture characteristic. Nevertheless, the torsion test of treated steel wire demonstrates that delamination occurs during torsional deformation, which implicates that the studied thermal–mechanical treatment is whereas not the optimum process for manufacturing the high–performance steel wires. The sequential TEM observation shows the remarkable different structure of pearlite lamellae in drawn and treated wires. The local stress concentration resulting from the separately granular cementite precipitation may attribute to the delamination of steel wire after post drawing.

• Periodical: Advanced Materials Research (Volume 629)
• Pages: 192-197
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.629.192
• Online since: December 2012
• Authors: Fan Yang
• Keywords: Cold Drawing, Texture, Thermal Mechanical Treatment, Torsion

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