Development of TiC-VC Hardfacing Electrode with Non-Preheating and Wear Resistance Properties

In this paper,a new hardfacing electrode with high wear resistance and non preheating properties was developed.The ferrotitanium (Fe-Ti),ferrovanadium (Fe-V),rutile and graphite were used as the coating of electrode.The effect of content of composes of coating on the wear resistance,resistance to cracking and microstructure of hardfacing layer was also studied by means of SEM,EDAX,abrasive wear test,welding technical and hardness test.The results show that TiC,VC particles,which depressively distributed in the matrix of lath martensite and retained austenite,were formed by arc metallurgy reaction.The hardness and wear resistance of deposited metal were increased with the increase of content of Fe-Ti,Fe-V and graphite.However,the slag detachability of slag became bad when the content of Fe-Ti beyond 18%,the hardness and wear resistance of deposited metal decreased as the content of graphite beyond 12%.