切割后将试样表面进行打磨，以防表面微裂纹影响 实验结果。拉伸测试在美国 Instron 公司生产的 Instron3369 万能试验机上以 1mm/min 的速率进行，各方向试样均取自各锻件中心位置，如图 2-8 所示。各位 置至少测试 3 个试样，结果取平均值。 断口扫描分析采用 FEI Electron Optics B.V 生产的 Quanta FEG 250 型场发射 扫描电子显微镜，观察上述拉伸试验中产生的断口。

After cutting, polish the surface of the sample to prevent surface micro-cracks from affecting the experimental results. The tensile test was carried out on the Instron3369 universal testing machine produced by Instron, USA at a rate of 1mm/min. The samples in each direction were taken from the center of each forging, as shown in Figure 2-8. Everyone should test at least 3 samples and take the average of the results. Fracture scanning analysis uses Quanta FEG 250 field emission scanning electron microscope produced by FEI Electron Optics B.V to observe the fractures produced in the above-mentioned tensile test.