Paper Title:
Study on Microstructure and Properties of High Strength Construction Steel Bars
  Abstract

In this paper, the microstructure and properties construction steel bars under various quenching and tempering temperature are investigated. Tensile tests show that the maximum tensile strength is1489MPa, elongation 11%, quenching temperature and tempering temperature have effects on the strength and plasticity of the samples, but the latter effect is more pronounced than the former. Steel bars have superior delayed fracture resistance between 390 ~420°C. The microstructure of steel bar is mainly composed of fine tempered sorbite (troostite) with carbide distributed along the lath martensite boundaries. Thus, we draw the conclusion thermal refining is an effective way to improve mechanical properties and delayed fracture resistance of high strength construction steel bars.

  Info
Periodical
Advanced Materials Research (Volumes 368-373)
Chapter
Chapter 11: Innovation and Application of Ecological Architecture Technology
Edited by
Qing Yang, Li Hua Zhu, Jing Jing He, Zeng Feng Yan and Rui Ren
Pages
3787-3790
DOI
10.4028/www.scientific.net/AMR.368-373.3787
Citation
G. Z. Xiao, J. X. Zhao, L. L. Zhuang, "Study on Microstructure and Properties of High Strength Construction Steel Bars", Advanced Materials Research, Vols. 368-373, pp. 3787-3790, 2012
Online since
October 2011
Export
Price
$32.00
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