Vickers hardness is a standard for expressing the hardness of materials proposed by British Robert L. Smith and George E. Sandland in 1921 at Vickers Ltd. This is another hardness testing method following the Rockwell hardness and Brinell hardness testing methods.
1 Principle of Vickers hardness tester:
The Vickers hardness tester uses a load of 49.03~980.7N to press a square cone-shaped diamond intruder with an included angle of 136° on the material surface. After maintaining it for a specified time, measure the indentation diagonally. Line length, and then calculate the Vickers hardness value according to the formula.
2.Load application range:
01: The Vickers hardness tester with a load of 49.03~980.7N is suitable for hardness measurement of larger workpieces and deeper surface layers;
02: Small load Vickers hardness, test load <1.949.03N, suitable for hardness measurement of thin workpieces, tool surfaces or coatings;
03: Micro-Vickers hardness, test load <1.961N, suitable for hardness measurement of metal foils and extremely thin surface layers.
In addition, equipped with a Knoop indenter, it can measure the Knoop hardness of brittle and hard materials such as glass, ceramics, agate, and artificial gemstones.
3 Advantages of Vickers hardness tester:
1) The measurement range is wide, ranging from soft metals to ultra-hardness testers to super-hard metals, and the measurement range ranges from a few to three thousand Vickers hardness values.
2) The indentation is small and does not damage the workpiece. It can be used for hardness testing of workpieces whose surface cannot be damaged.
3) Because of its small test force, the minimum test force can reach 10g, so it can detect some thin and small workpieces.
4 Disadvantages of the Vickers hardness tester: Compared with Brinell and Rockwell hardness testing methods, the Vickers hardness test has requirements for the smoothness of the workpiece surface, and some workpieces need to be polished, which is time-consuming and labor-intensive; maintenance The hardness tester is relatively precise and is not suitable for use in workshops or on-site. It is mostly used in laboratories.
5 Vickers hardness tester series
1) Economical Vickers hardness tester
2) Digital display touch screen Vickers hardness tester
3) Fully automatic Vickers hardness tester
Post time: Dec-15-2023
