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采用超音速电弧喷涂(HV-ARC)技术在Q235钢表面制备FeCrNi复合涂层,通过扫描电镜(SEM)、X射线衍射仪(XRD)、光学显微镜、显微硬度计、摩擦磨损试验机、电化学工作站等手段研究了涂层的微观结构及性能。结果表明:超音速电弧的高能量、高粒子速度使得涂层具有极低的孔隙率,较高的结合强度;涂层中存在Cr、Ni的氧化相,这些氧化相对涂层的硬度及耐磨性能有着显著影响;超音速电弧FeCrNi复合涂层的耐磨性能较普通电弧涂层提高40%以上,较基体Q235钢提高4.5倍以上,耐腐蚀性能也有了大幅的提高。
The FeCrNi composite coating was prepared on the surface of Q235 steel by ultrasonic arc spraying (HV-ARC) technology. The wear resistance of the Q235 steel was characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), optical microscope, microhardness tester, Chemical workstations and other means to study the microstructure and properties of the coating. The results show that the high energy and high particle velocity of supersonic arc make the coating have very low porosity and high bonding strength. There are oxidation phases of Cr and Ni in the coating, which are opposite to the hardness and wear resistance of the coating The wear resistance of supersonic arc-coated FeCrNi composite coating is more than 40% higher than that of ordinary arc coating, 4.5 times more than that of Q235 steel, and the corrosion resistance has also been greatly improved.