Paper Title:
Study on the Carbides and the Interface Bonding in Surfacing Welding Metal
  Abstract

The interface bonding between the carbides and the solid solution matrix is studied in surfacing welding metal of Fe-Nb-Ti-V-C alloy system. Both the quenched welding droplets and the deposited metal are investigated by means of SEM and TEM. In the deposited metal, the carbides are dispersed, and the matrix is low carbon martensite. According to welding metallurgical characteristics, it is deduced that the carbides are formed during the droplets stage and then transmit into the welding pool. When the welding pool solidify, the carbides serve as nucleation site, so the interface between the carbides and the matrix is clean and free from other reactants. The selected area electron diffraction (SAED) analysis reveals that the mismatch between the two phase is δ= (6.1~8.3)%, and there exist a crystal parallel relationship at the interface: (002)α-Fe // (220)(NbTiV)C. The metallurgical bonding between the carbides and the matrix favors to prevent the carbides to detach from the matrix during wear process, so the surfacing welding metal can achieve good wear-resistance.

  Info
Periodical
Key Engineering Materials (Volumes 353-358)
Edited by
Yu Zhou, Shan-Tung Tu and Xishan Xie
Pages
1692-1695
DOI
10.4028/www.scientific.net/KEM.353-358.1692
Citation
Y. B. Zhang, Y. W. Shi, "Study on the Carbides and the Interface Bonding in Surfacing Welding Metal ", Key Engineering Materials, Vols. 353-358, pp. 1692-1695, 2007
Online since
September 2007
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Price
$32.00
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