Abstract In this study, a high-temperature hardness tester was developed, and its basic structure, main performance and advantages were introduced. The high-temperature hardness tester has three main advantages: it significantly prevents the oxidation of the sample and the indenter; it does not affect the stiffness of the bearing platform; and ensures the accurate measurement of the relevant image at high temperatures. Then, the Vickers indentation test was carried out using the developed hardness tester. The contact surface of the indenter and the sample was found to be a curved surface, and the height of the middle of the indentation edge was found to be higher than the height of the indentation corner. Therefore, a three-dimensional model of indentation morphology was established, and hardness values at different temperatures were corrected. It was found that the hardness of CTS18D cemented carbide decreased with increasing temperature, and the value decreased by approximately 35% from room temperature to 1000 °C. In addition, at the same temperature, the corrected hardness value was smaller than the measured hardness value. Moreover, the difference value between the measured hardness and the corrected hardness decreased from 3.9% to 3.2% with an increase in temperature from 26 °C to 1000 °C.

中文翻译：

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研制的高温硬度计对硬质合金温变维氏硬度的修正

摘要 本研究研制了一种高温硬度计，介绍了其基本结构、主要性能和优点。高温硬度计具有三大优点：显着防止试样和压头的氧化；不影响承载平台的刚度；并确保在高温下准确测量相关图像。然后，使用开发的硬度测试仪进行维氏压痕测试。发现压头与试样的接触面为曲面，压痕边缘中部的高度高于压痕角部的高度。因此，建立了压痕形貌的三维模型，并对不同温度下的硬度值进行了修正。发现CTS18D硬质合金的硬度随着温度的升高而降低，从室温到1000℃该值下降约35%。另外，在相同温度下，校正后的硬度值小于实测硬度值。此外，随着温度从 26°C 升高到 1000°C，实测硬度和校正硬度之间的差值从 3.9% 减小到 3.2%。