为研究不同尺寸摆锤刀刃锤头对冲击试验结果的影响，采用刀刃圆角半径分别为2 mm和8 mm的锤头对多种材料进行夏比V型冲击试验，并从吸收能量、断口形貌等方面分析V型缺口试样在2 mm摆锤刀刃下的冲击吸收能量 KV2与8 mm摆锤刀刃下的冲击吸收能量KV8的变化规律，研究摆锤刀刃尺寸对夏比V型冲击吸收能量的影响。结果表明：在韧脆转变温度曲线上平台区和转变区（塑性断口）范围内，KV8大于KV2；在转变区（脆性断口）范围内，KV2大于KV8；在下平台区，KV8与KV2几乎相等。

In order to study the effects of pendulum striking edge radii on the impact test results, Charpy V-notch impact test was carried out to variety materials with 2 mm and 8 mm pendulum striking edge radii. By analyzing the variation rules of KV2 (the impact absorbed energy with 2 mm pendulum striking edge radius) and KV8 (the impact absorbed energy with 8 mm pendulum striking edge radius) from the aspect of impact absorbed energy and fracture morphology, the effects of pendulum striking edge radii on the Charpy impact absorbed energy were studied. The results show that in the range of top platform and transition zone (plastic fracture) of the ductile-brittle transition temperature curve, KV8 was higher than KV2. In the transition zone (brittle fracture), KV2 was higher than KV8. However, in the lower platform zone, KV2 and KV8 were almost equal.