ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
The interface bonding between the carbides and the solid solution matrix is studied insurfacing welding metal of Fe-Nb-Ti-V-C alloy system. Both the quenched welding droplets and thedeposited metal are investigated by means of SEM and TEM. In the deposited metal, the carbidesare dispersed, and the matrix is low carbon martensite. According to welding metallurgicalcharacteristics, it is deduced that the carbides are formed during the droplets stage and then transmitinto the welding pool. When the welding pool solidify, the carbides serve as nucleation site, so theinterface between the carbides and the matrix is clean and free from other reactants. The selectedarea 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 todetach from the matrix during wear process, so the surfacing welding metal can achieve goodwear-resistance
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/55/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.353-358.1692.pdf
