Effect of SHS TiC Reinforced Fe on Microstructure and Hardness of Composite Coatings on Steel

Titanium carbide were produced by self-propagating high temperature synthesis,which were composed of titanium powder and graphite powder.Then different sizes of TiC were obtained by broken and screening in order to as a hard phase.In addition,a TiC/Fe surface composite,consising of SHS titanium carbide and cast iron,was produced by Vacluum cladding process.The effect of different content and size of Tic particles on microstructure and hardness was studied.And the it was checked againsted the coating which was added with traditional nano Tic particles.Results show that when the quality fraction of TiC particles is constant,the smaller the particles size,the higher hardness.The highest hardness can be reached to 62 HRC.When the size of TiC particles is unchanged,with the increase of quality fraction of TiC particles,the hardness hardly increaseS and maintainS at ahout 63 HRC.TiC particles uniform distribute in composite coating.The composite coating and the master-steel has good interfacial boning.That is benefical to the wear resistance of coating.