Abstract
A Fe-based composite coating reinforced with in situ synthesized TiC-TiB2 particles was successfully fabricated on Q235A by laser cladding with mixture powder of TiO2, Al, B4C, C and Fe55 as precursors. The microstructure and mechanical properties of coating were investigated. The results show that the main phases of coating are TiB2, TiC, (Fe,Cr)7C3 and α-Fe. TiC particles show the shape of block, TiB2 particles exhibit the shape of strip. Compared with the Q235A, the microhardness of the composite coating improved drastically.
Publisher
Trans Tech Publications, Ltd.
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