Fabrication of composite layer containing TiN and TiC particles on the surface of steel by TIG

Fabrication of composite layer containing TiN and TiC particles on the surface of steel by TIG

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Part of #Fabrication of composite layer containing TiN and TiC particles on the surface of steel by TIG# :

Publishing year : 2012

Conference : Third International Conference on Thermal Treatment of Materials

Number of pages : 7

Abstract: The TIG (Tungsten Inert Gas) welding process has been investigated for the possibility of fabrication of a composite layer containing TiN and TiC on the surface of AISI 1045 steel. In order to do this, once a powder of Ferro-Titanium and sodium silicate adhesive by blowing nitrogen and another time, a powder containing graphite powder and Ferro-Titanium were bound on the surface of the steel in pre deposited state and then surface melting through the TIG process Was conducted. Microstructural examination by optical microscope and SEM (scanning electron microscope), micro hardening and XRD (X-ray diffraction) were performed on the created surfaces. The results show the formation of cubic titanium nitride through a reaction between Ferro-Titanium and Nitrogen and cubic titanium carbide through a reaction between graphite powder and Ferro-Titanium in the melt pool. The studies showed that the carbide and nitride particles were uniformly scattered in the composite coat. Since these particles were created and uniformly scattered in the matrix, the created composite films had high hardness levels (about 50 HRC).