Paper Title:
Microstructure and Deformation Characteristics of X80 High Deformability Pipeline Steel
  Abstract

Two kinds of X80 high deformability pipeline steels have been processed by applying two-stage cooling process (TSC) and heat treatment on-line process (HOP). The microstructure of TSC steel and HOP steel are polygonal ferrite (PF) + quasi-polygonal ferrite (QF) + granular bainite (GB) multiphase and QF + GB+ martensite-austenite (M/A) multiphase respectively. In HOP steel, the volume of M/A is much more and the size is much larger than that in TSC steel. Some degenerated M/A constituents are also observed in HOP steel. The HOP steel has shown higher tensile strength, lower yield ratio and lower uniform elongation than TSC steel. The strain-nI (instantaneous n-value) curve of HOP steel could be divided into two stages and the TSC’s could be separated to three stages.

  Info
Periodical
Advanced Materials Research (Volumes 299-300)
Edited by
Jianzhong Wang and Jingang Qi
Pages
323-327
DOI
10.4028/www.scientific.net/AMR.299-300.323
Citation
D. L. Meng, Y. L. Kang, S. Y. An, D. X. Xia, "Microstructure and Deformation Characteristics of X80 High Deformability Pipeline Steel", Advanced Materials Research, Vols. 299-300, pp. 323-327, 2011
Online since
July 2011
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Price
$32.00
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