Technology and Properties of Laser Cladding TiZrNbV High-Entropy Alloy Coating on Q235 Steel
The TiZrNbV high-entropy alloy coating was prepared on the surface of Q235 steel by laser cladding technology.The influence of different laser power on the surface morphology,micro-structure,phase composition,micro-hardness and wear-resisting performance of the high entropy alloy coating was studied under the control of other laser process parameters.The SEM surface scanning results show that the coating tissue is mainly branch and inter-dendrite tissues,and the grains are significantly refined under the laser power of 1 400 W.The XRD results show that under a laser power of 1 800 W,the matrix elements are excessively diluted in the coating,resulting in a large amount of α-Fe brittle phases,and the phase composition of the coating does not change with increasing laser power between 1 000～1 600 W.The experimental results show that the TiZrNbV high-entropy alloy coating is prepared by laser coating technology on the surface of Q235 steel,the micro-hardness increases with the increase of laser power,and the wear resistance is greatly improved.And the comprehensive mechanical performance of the coating is the best under the parameter of laser power of 1 400 W.
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