小冲杆试验技术测定铁素体钢P92的拉伸强度

Tensile Strength of Ferritic Steel P92 by Small Punch Test Technology

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_y与极限载荷P_max随厚度t的增加呈线性增加趋势。在不同温度下，P_y与标准试验屈服强度σ_y的拟合关系式σ_y＝αP_y/t²中的系数α与温度T的关系为α＝9.421 3×10^-4T+0.349 4。其中，室温下α取为0.382。

Abstract: 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 P_y and maximum load P_max increase linearly as the thickness t increases. And the coefficient α in the σ_y＝αP_y/t² between yield load P_y of SPT and standard yield strength σ_y changes linearly with temperature T as α＝9.421 3×10^-4T+0.349 4. The α value of room temperature is 0.382.