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The aim of the present study was to fabricate Fe-TiC-Al_2O_3 composites on the surface of medium carbon steel.For this purpose,TiO_2-3C and 3TiO_2-4Al-3C-xFe(0 ≤ x ≤ 4.6 by mole) mixtures were pre-placed on the surface of a medium carbon steel plate.The mixtures and substrate were then melted using a gas tungsten arc cladding process.The results show that the martensite forms in the layer produced by the TiO_2-3C mixture.However,ferrite-Fe_3C-TiC phases are the main phases in the microstructure of the clad layer produced by the 3TiO_2-4Al-3C mixture.The addition of Fe to the TiO_2-4Al-3C reactants with the content from 0 to 20wt%increases the volume fraction of particles,and a composite containing approximately 9vol%TiC and A1_2O_3 particles forms.This composite substantially improves the substrate hardness.The mechanism by which Fe particles enhance the TiC + A1_2O_3 volume fraction in the composite is determined.
The aim of the present study was to fabricate Fe-TiC-Al_2O_3 composites on the surface of medium carbon steel. For this purpose, TiO_2-3C and 3TiO_2-4Al-3C-xFe (0 ≤ x ≤ 4.6 by mole) -placed on the surface of a medium carbon steel plate. The mixtures and substrates were then melted using a gas tungsten arc cladding process. The results show that the martensite forms in the layer produced by the TiO 2 -3C mixture. However, ferrite-Fe_3C -TiC phases are the main phases in the microstructure of the clad layer produced by the 3TiO_2-4Al-3C mixture. The addition of Fe to the TiO_2-4Al-3C reactants with the content from 0 to 20 wt% increases the volume fraction of particles , and a composite containing about 9 vol% TiC and A1_2O_3 particles forms. This composite substantially improves the substrate hardness. The mechanism by which Fe particles enhance the TiC + A1_2O_3 volume fraction in the composite is determined.