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中文摘要：
利用小冲杆试验技术测定了不同温度下不同厚度的铁素体钢P92试样的载荷-位移曲线。研究结果显示，室温下小冲杆试验的屈服载荷P，与极限载荷Pmax随厚度t的增加呈线性增加趋势。在不同温度下，Pγ与标准试验屈服强度口，的拟合关系式δy=αPy／t^2中的系数α与温度T的关系为α=9．4213×10^-4T＋0．3494。其中，室温下α取为0．382。
英文摘要：
The measurement method of tensile strength of ferritic steel P92 by small punch test （SPT） technology was investigated. The load-displacement curves with different temperatures and thicknesses were obtained by SPT technology. The results show that the values of yield load Py and maximum load Pmax increase linearly as the thickness t increases. And the coefficient a in the δy =αPy/t^2 between yield load Py of SPT and standard yield strength ay changes linearly with temperature T as a=9. 421 3 × 10.4 T＋0. 349 4. The a value of room temperature is 0. 382.
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