Guangxi Key Laboratory of Processing for Non-ferrous Metal and Featured Materials, Guangxi University, Nanning 530004 2 Center of Ecological Collaborative Innovation for Aluminum Industry in Guangxi, Guangxi University, Nanning 530004
Abstract: FeAlCrTiC wear-resistant and corrosion-resistant coatings were prepared on the substrate of 45 steel by using high-velocity arc spraying (HVAS) technology. The microstructures and properties of the coatings were studied and analyzed by optical microscope, SEM, X-ray photo-electron spectroscopy, X-ray diffractometer, Rockwell hardness tester, pin-disc abrasive wear testing machine, universal testing machine and electrochemical workstation. The results show that the FeAlCrTiC coatings have a typical tight layered structure, and contain crystalline and oxide and little amorphous phases. The average value of internal porosity of coating is 5.36%. The main combination between coating and substrate are mechanical combination. The bonding strength between coating and matrix reaches 40.56 MPa. The Rockwell hardness of the coating surface is 45.5HRC. The relative wear resistance of the coating reaches 1.776. The self-corrosion potential of the coating is 113.8 mV higher than that of the substrate, which lead to better corrosion resistance performance.
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