Paper Title:
Study on Fiber Laser Welding for DP780 High Strength Steel
  Abstract

Welding experiments of DP780 high strength steel plate produced by Baosteel with IPG YLR-6000-ST2 fiber laser have been processed. The influence of welding parameters on welding quality has been investigated. As well as microstructure and mechanical character of welding seam have been analyzed. The results show that the joint appearance of DP780 high strength steel welded with IPG YLR-6000-ST2 fiber laser has good performance and the mechanics property is good without fit-up gap. The microstructure of weld bead is columnar crystals, mainly lath-shaped ferrite, needle-like lower bainite and a small amount of martensite. Heat-affected zone is narrow and the grain grows with little size. The measured micro-hardness values of the sample decrease smoothly from weld center to base metal and there does not have softened zone.

  Info
Periodical
Advanced Materials Research (Volumes 328-330)
Chapter
Chapter 1: Manufacturing Technology and Processing
Edited by
Liangchi Zhang, Chunliang Zhang and Zichen Chen
Pages
48-53
DOI
10.4028/www.scientific.net/AMR.328-330.48
Citation
T. Huang, L. J. Xin, Z. Y. Wang, "Study on Fiber Laser Welding for DP780 High Strength Steel", Advanced Materials Research, Vols. 328-330, pp. 48-53, 2011
Online since
September 2011
Export
Price
$32.00
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