选取不同强度、不同厚度的冷轧薄板，采用不同的横截面积计算方法，研究了试样不同横截面积计算方法对抗拉强度测试结果的影响。结果表明：在加工质量良好的情况下，对于不同厚度、不同强度的冷轧薄板试样，采用面积平均值、面积最小值、宽厚度平均值的乘积及在试样标距中间测量横截面积所得到的抗拉强度无显著差异。而通过宽厚度实测尺寸平均值的乘积、面积的平均值、面积的最小值所得到的抗拉强度测试结果与GB/T 228.1中建议采用的通过名义尺寸得到的抗拉强度存在显著差异。建议GB/T 228.1标准在修订时增加采用宽度平均值和厚度平均值的乘积来计算试样原始横截面积的方法。

The influence of different cross section area of sample calculation methods on tensile strength test results of cold-rolled sheet with different strength and thickness was studied by using different cross section area calculation methods. The results show that under the condition of good processing quality, there was no significant difference in the tensile strength test results obtained by the product of the average value of the area, the minimum value of the area and the average width and thickness and the cross section area measured in the middle of the sample gauge distance for cold-rolled sheet samples with different thickness and strength. However, there was a significant difference between the tensile strength test results obtained by the product of the average value of the measured width and thickness, the average value of the area and the minimum value of the area and the tensile strength calculated by the nominal size recommended in GB/T 228.1. It is suggested that the product of average width and average thickness should be used to obtain the original cross section area of sample in the revision of GB/T 228.1.