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一概述在试验中,我们遇到一种18Ni350材料的薄片,硬度在HV680以上,厚度仅只为0.35～0.4mm进行拉伸时,虽采用了各种齿形规格的平夹头,均产生打滑而使试验失败。因此,我们从试样本身着手,以降低夹头处的硬度和增加厚度使夹紧力增大为指导思想,经过多次试验,最后以粘贴试样获得成功,取得该材料的抗拉强度。二试验与记录我们分几种方法同时进行试验,第一组10片试样,采取了在试样两端进行退火处理,使试样夹持部
An overview In the experiment, we encountered a sheet of 18Ni350 material, hardness above HV680, the thickness of only 0.35 ~ 0.4mm for stretching, although the use of a variety of tooth-shaped flat chucks, are slippery The test failed. Therefore, we start from the sample itself, to reduce the chuck at the hardness and increase the thickness of the clamping force increased as the guiding ideology, after many tests, and finally to paste the sample was successful, to obtain the tensile strength of the material. Two tests and records We test at the same time in several ways, the first group of 10 samples, taken at both ends of the sample annealed so that the sample holder