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通过扫描电镜、X射线衍射和DSC热分析试验等手段,考察了热喷涂非晶纳米晶涂层的组织结构、物相组成和相变点,并对其结合强度、高温硬度和磨粒磨损及冲蚀磨损性能进行测试。结果表明,本电弧喷涂材料制备的涂层结合强度为62.54 MPa,与基体有很强的结合力,具有明显的冶金结合特征;涂层常温硬度大于1 050 HV,620℃高温硬度高达1 250 HV,呈现出极好的高温红硬性;非晶涂层相对耐磨性为Q235钢的22.34倍,30°冲蚀磨损为Q235钢的6.33倍。
The microstructure, phase composition and phase transition point of the thermal sprayed amorphous nanocrystalline coatings were investigated by scanning electron microscopy, X-ray diffraction and DSC thermal analysis. The bonding strength, high temperature hardness and abrasive wear Erosion wear test. The results show that the coating prepared by the present arc spraying material has a bonding strength of 62.54 MPa and a strong binding force with the substrate and has obvious metallurgical bonding characteristics. The coating has a hardness of more than 1 050 HV at room temperature and a hardness of up to 1 250 HV at 620 ° C. , Showing an excellent high-temperature red hardness; the relative wear resistance of the amorphous coating is 22.34 times that of Q235 steel, and the erosion loss at 30 ° is 6.33 times that of Q235 steel.