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Hardness Tester
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Hardness Tester
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Catalog excerpts
What are the differences between different types of hardness tester ? 1 There are many kinds of hardness testers on the market, including Rockwell hardness tester, Knoop hardness tester, Brinell hardness tester, Shore hardness tester, Vickers hardness tester, etc. Let's see the differences between them. 2 ① Rockwell hardness tester is applicable to the hardness measurement of ferrous metals, non-ferrous metals and non-metallic materials. The principle is to measure the depth. When HB>450 or the sample is too small, if Brinell hardness test cannot be used, Rockwell hardness shall be used for measurement. It uses a diamond cone with a vertex angle of
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120 ° or a steel ball with a diameter of 1.59 and 3.18 mm, which needs to be pressed into the surface of the tested material under a certain load, and the material hardness is obtained according to the depth of the indentation, which is applicable to finished products and thin sheets. 3 ② Brinell hardness tester uses optical principle to measure the diameter of circular indentation, and uses a certain load to press a hardened steel ball of a certain size into the surface of the material. After being kept for a period of time and unloaded, the ratio of the load to the indentation area, that is,...
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