Abstract
Titanium carbide ceramic particles could act as inoculants to generate fine microstructure and helps to increase the wear resistance for steel. In this article, the effect of titanium addition on the microstructure, wear and mechanical properties of Ni-Hard4 white cast iron was studied. The study was undertaken with five laboratory pieces of cast iron made with different titanium amounts. The microstructures were examined by optical microscopy, scanning electron microscopy equipped by EDS. The impact energy, hardness and wear resistance of the samples were determined. Thermodynamic calculation showed that solute titanium atoms can react with carbon and form TiC in modified samples. The results indicated that the morphology of chromium carbides can be improved by adding a suitable amount of titanium. This improvement was correlated with the emergence of TiC ceramic particles. These particles can act as the substrates for heterogeneous nucleation of primary chromium carbides, which result in significant refinement of the final average carbide diameter. In addition, the hardness and wear resistance were improved without significant variations in fracture toughness. The wear resistance was increased with titanium addition owing to change microstructure and the precipitation hardening of fine ceramic particles in the martensitic matrix.
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Javaheri, V., Mohammadnezhad, M. & Bahrami, M. Microstructures, Wear Behavior and Mechanical Properties of the TiC Ceramic Particulate Locally Reinforced Ni-Hard4 White Cast Iron Matrix. Trans Indian Inst Met 69, 1571–1578 (2016). https://doi.org/10.1007/s12666-015-0731-5
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DOI: https://doi.org/10.1007/s12666-015-0731-5