Paper Title:
Effects of Titanium Microalloying on Steel Feeding and Contraction
  Abstract

Proper content of titanium, microalloying in steel ZG200-400 smelted in intermediate frequency induction furnace, could effectively increase the volume of concentrated shrinkage cavity, and restrain the forming of shrinkage porosity. The concentrated shrinkage cavity was analyzed quantitatively by stuffing wet gluten and draining water method. The maximal cavity arrived at 0.18wt.% titanium microalloying. By scanning electron microscope (SEM) and energy disperse spectroscope (EDS) analysis, it was found that TiC, acting as heterogeneous nuclei, could refine the structure grains, diminish the strong dendrites, and increase the fluidity and feeding capacity of steel liquid. However, overdoes titanium microalloying easily caused mass nitrides or oxides, which kept solid phases with high meting point in metal liquid to increase its viscosity, decrease the fluidity and enlarged the composition supercooling. So the metal liquid, with poor feeding, left more shrinkage porosity, less concentrated shrinkage cavity in solidification.

  Info
Periodical
Advanced Materials Research (Volumes 163-167)
Edited by
Lijuan Li
Pages
795-798
DOI
10.4028/www.scientific.net/AMR.163-167.795
Citation
H. T. Wang, J. W. Tan, Z. Chu, C. Y. Sheng, "Effects of Titanium Microalloying on Steel Feeding and Contraction", Advanced Materials Research, Vols. 163-167, pp. 795-798, 2011
Online since
December 2010
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Price
$32.00
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