Abstract:The Fe-based alloy coatings reinforced with in situ synthesized ceramic phases containing titanium were prepared on Q235 steel by reactive plasma cladding process using Fe901, Ti, B4C and h-BN powders as raw materials. The results show that Fe is apt to react with h-BN to produce FeB comparing with B4C. If both of B4C and BN are added as reactants, the content of FeB will increase and the Ti2N and TiB intermediates can be found in the coatings when B4C/h-BN ratio decreases to a certain value. However, it can depress the growth of ceramic phases. The microstructure of the clad coatings exhibits an obvious gradient distribution along the depth direction. The size and morphology of TiB2 change with the temperature and composition of the molten pool. Increasing h-BN amount will result in the decrease of microhardness of the coatings. The high microhardness value 1126HV0.2 can be achieved at the near surface layer for the coating at Ti : B4C : h-BN=3 : 1 : 0.