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以低镍白铜粉末为原料,采用等离子喷涂工艺在碳钢Q235表面制备B10涂层,喷涂功率23.5~26.4 k W,喷涂距离130~180 mm。研究了喷涂功率和距离对涂层结合强度的影响。采用扫描电镜观察涂层组织形貌,用能谱仪进行化学成分分析,用X射线衍射进行物相分析。结果表明:随喷涂功率和喷涂距离的增大,涂层与基体间的结合强度先增大后减小;在喷涂功率25 k W、喷涂距离150 mm时,涂层均匀致密,结合强度达到最大值28.3 MPa。其中,硬度达到218.1 HV0.1。
Low nickel white copper powder was used as raw material to prepare B10 coating on Q235 surface of carbon steel by plasma spray process with spraying power of 23.5-26.4 kW and spraying distance of 130-180 mm. The influence of spraying power and distance on the bonding strength of the coating was studied. Scanning electron microscopy was used to observe the microstructure of the coatings. The chemical composition was analyzed by EDS and the phase analysis was carried out by X-ray diffraction. The results show that the bonding strength between the coating and the substrate first increases and then decreases with the increase of spraying power and spraying distance. When the spraying power is 25 kW and spraying distance is 150 mm, the coating is uniform and compact, and the bonding strength reaches the maximum Value 28.3 MPa. Among them, the hardness reached 218.1 HV0.1.