按照国标GB/T229-2007规定制备长度为55 mm，横截面为10mm×10mm方形截面，根据品种冲击检测要求加工成V型或U型槽。在要求低温冲击性能检测时，将试样放置于含有冷却液体介质（酒精或液氮）的CDC型冲击试验低温度仪的网栅上，设置试验温度，温度降至设置温度后在5 s之内将试样置于WANCE 750J智能化全自能冲击试验机两支座之间，缺口背向打击面放置，用摆锤一次打击试样，测定试样的吸收能量。冲击检验前，先对冲击检验设备进行校准，以保证检测数据有效性。

According to the national standard GB/ t229-2007, the preparation length is 55 mm, the cross section is 10mm×10mm square section, and it is processed into v-shaped or u-shaped groove according to the impact detection requirements of varieties. On the low temperature impact performance test, place the sample in the cooling liquid medium containing alcohol (or nitrogen) CDC type impact test of low temperature meter mesh, set up the test temperature, the temperature dropped to set the temperature after the sample within 5 s in WANCE 750 j intelligent from between two bearings can impact tester, gap back to be summarized, The absorption energy of the sample was measured by striking the sample once with a pendulum. Before impact test, the impact test equipment should be calibrated to ensure the validity of test data.