Hardfacing coatings involve hard carbide/boride phases dispersed in a relatively soft steel matrix. For the hardness measurements of hardfacing coatings, depending on the micro structure, both the hardness test method and the applied load affect the hardness results; therefore, they affect the wear performance predictions of the coating. For this reason, the proper hardness test method should be determined according to the microstructure of the coating, and the reliability of the obtained hardness data should be established. This study aimed to determine the most suitable hardness test method for hypoeutectic and hypereutectic microstructures of hardfacing coatings by analyzing the reliability of Rockwell-C and Vickers hardness test results. Reliability analyses showed that Rockwell-C is not a suitable hardness test method for hypereutectic hardfacing coatings. Based on the relationship between wear resistance and hardness, Vickers hardness method was found more suitable for the considered materials.

堆焊涂层涉及分散在相对较软的钢基体中的硬质碳化物/硼化物相。对于表面涂层的硬度测量，取决于微观结构，硬度测试方法和施加的载荷都会影响硬度结果。因此，它们会影响涂层的磨损性能预测。因此，应根据涂层的微观结构确定适当的硬度测试方法，并建立所获得硬度数据的可靠性。本研究旨在通过分析Rockwell-C和Vickers硬度测试结果的可靠性，确定最适合硬质合金涂层的亚共晶和过共晶显微组织的硬度测试方法。可靠性分析表明，Rockwell-C不是用于过共晶硬面涂层的合适硬度测试方法。根据耐磨性和硬度之间的关系，发现维氏硬度法更适合于所考虑的材料。