The properties of powder bed have always been an important research field of powder engineering. In this paper, with the help of FT4 powder rheometer, eight kinds of powder samples from different fields were used as experimental materials, and the bed tensile strengths of the powder were obtained by compression test, shear test and fluidization test. Although the physical properties of the eight materials are different, the three units show the same result trend. Taking the glass bead which meets the hypothesis of the Rumpf equation best as the object, its theoretical tensile strength was calculated. Later, tensile strengths of the glass bead obtained from three experimental methods were compared to its theoretical value to evaluate the accuracy of each test methods. Finally, based on a combination of advantages of the compression test and the fluidization test, a fitting equation was established, providing a simple and time-saving method to obtain the tensile strength of the bed accurately.

粉末床的性能一直是粉末工程的重要研究领域。本文利用FT4粉末流变仪，将来自不同领域的八种粉末样品作为实验材料，通过压缩试验，剪切试验和流化试验获得了粉末的床层抗张强度。尽管八种材料的物理性质不同，但三种单位显示出相同的结果趋势。以最符合Rumpf方程假设的玻璃珠为对象，计算其理论抗拉强度。随后，将通过三种实验方法获得的玻璃珠的拉伸强度与其理论值进行比较，以评估每种测试方法的准确性。最后，