采用不同的拉伸速率测试了900℃下Mar-M247镍基高温合金的拉伸强度，研究了高温条件下拉伸速率对高温合金材料强度的影响。结果表明：恒定试验速率下，较高的速率使得Mar-M247镍基高温合金的规定塑性延伸强度和抗拉强度更高。横梁位移速率不同时，Mar-M247镍基高温合金的高温抗拉强度随拉伸速率的增加而增大。高温拉伸时在屈服强度以后阶段是否需要加速或者在什么时候加速所得到的结果更为准确，还缺乏理论和实践的支撑，需要开展大量的试验研究工作。

The tensile strength of MAR-M247 nickel base superalloy at 900℃ was tested by different tensile rates, the effect of tensile rate on the strength of superalloy was studied. The results show that the specified plastic extension strength and tensile strength of MAR-M247 nickel base superalloy were higher with higher rate under constant test rate. The high temperature tensile strength of MAR-M247 nickel base superalloy increased with the increased of tensile rate when the displacement rate of crossbeam was different. Whether or when acceleration is needed in the later stage of yield strength, the test results are more accurate, which is still lack of theoretical and practical support, and a lot of test research work needs to be carry out.