Abstract

An instrument capable of assessing the hardness of materials by instrumental indentation under industrial-production conditions, including pipelines and parts of working mechanisms (bridges, railroad tracks, ship mechanisms, and other products), which operate outdoors, is described. The key components of the device are: a load-applying element (electromagnetic actuator), a displacement sensor (a capacitive sensor mounted on the working rod) and an indenter (a Berkovich diamond tip with a diameter of 500 μm and a radius of 100 nm). The largest force that can be applied to the sample is 10 N, and the maximum movement of the indenter reaches 150 μm. For the convenience of measuring both bulk and thin samples, a portable hardness tester is equipped with two different nozzles. The main peculiar feature of the device is measurement of the hardness and the Young’s modulus of the material within a single working cycle. The device is tested on various materials: steels of grades 40Cr13 and 08Cr18N10T (including samples that underwent aging), aluminum, fused silica, polycarbonate, and laminated chipboard. The roughness of the tested surfaces and the range of loads required to carry out instrumental indentation with a portable device are determined as well. The values of the hardness and elastic modulus are consistent with data obtained by means of laboratory hardness testers.

中文翻译：

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便携式压痕硬度计

摘要

描述了一种能够通过在工业生产条件下的压痕来评估材料硬度的仪器，包括在室外工作的管道和工作机构的零件（桥梁，铁轨，船舶机构和其他产品）。该设备的关键组件是：负载施加元件（电磁致动器），位移传感器（安装在工作杆上的电容传感器）和压头（直径为500μm，半径为100的Berkovich金刚石尖端） nm）。可以施加到样品的最大力为10 N，压头的最大移动量达到150μm。为了方便测量散装样品和薄样品，便携式硬度计配有两个不同的喷嘴。该设备的主要特点是在单个工作周期内测量材料的硬度和杨氏模量。该设备已在多种材料上进行了测试：40Cr13和08Cr18N10T级钢（包括经过老化的样品），铝，熔融石英，聚碳酸酯和层压刨花板。还确定了被测表面的粗糙度以及使用便携式设备进行仪器压痕所需的载荷范围。硬度和弹性模量的值与通过实验室硬度计获得的数据一致。还确定了被测表面的粗糙度以及使用便携式设备进行仪器压痕所需的载荷范围。硬度和弹性模量的值与通过实验室硬度计获得的数据一致。还确定了被测表面的粗糙度以及使用便携式设备进行仪器压痕所需的载荷范围。硬度和弹性模量的值与通过实验室硬度计获得的数据一致。