针对高强度铝合金钻杆材料屈服强度高、弹性模量小的特点, 分析了采用常规拉伸试验方法测试对其拉伸性能的影响, 并对试验速率及控制方式进行了调整, 得出了适用于高强度铝合金钻杆材料较为合理的拉伸试验方法。根据试验结果, 建议以规定塑性延伸强度Rp0.2作为高强度铝合金钻杆材料屈服强度的参考值; 在引伸计标距伸长2%时再摘取引伸计, 以读取可靠的屈服强度Rp0.2; 高强度铝合金钻杆材料的塑性性能对拉伸速率较为敏感, 应尽可能地减缓塑性变形阶段的试验速率。

Due to the characteristics of high yield strength and low elasticity modulus of high-strength aluminum alloy drill pipe, the effects of conventional tensile test method on the tensile properties were studied. By adjusting the tensile rate and control mode, a more reasonable tensile test method was obtained for high-strength aluminum alloy drill pipe. According to the test results, the plastic elongation strength Rp0.2 is recommended to be considered as the yield strength reference value. The extensometer should be picked down at 2% gauge length to reliably read the yield strength Rp0.2. The plastic performance of the high-strength aluminum alloy drill pipe material is sensitive to tensile rate, which should slow down as far as possible at plastic deformation stage.