通过对K002铸造高温合金叶片高温持久试样的取样位置与叶片原来和现在两种不同的组合方式测得的高温持久性能数据和显微组织差异进行对比分析，发现现在的组合方式测得的高温持久性能更能代表实际叶片的性能。因为现组合方式的高温持久试样不易产生明显的组织疏松等铸造缺陷，试验结果均能达到规范要求，且有较大富余量，较好地解决了由于试样的铸造缺陷导致的高温持久试验结果不合格的问题。

Through contrastively analyzing the differences of stress rupture properties at elevated temperature and microstructure of samples with original and current combination to the blades, it was found that the tested stress rupture properties of samples with current combination to the blades could represent the actual performance of the blades better that than that of the original combination. Because the stress rupture samples with current combination had no microporosity defect, the test results could meet the requirement of specification with more stock. By changing the sampling position, problem that the stress rupture properties test results were not acceptable caused by the test samples having casting defect was well solved.