Sample fixing device used for testing hardness and application

Abstract

The invention provides a sample fixing device used for testing hardness, and is characterized by comprising a metal casing and a magnetic field generation pedestal which have same shape and coupled size, the magnetic field generation pedestal is positioned below the metal casing, the magnetic field generation pedestal is connected to dc source to generate a magnetic field; a cavity is provided in the metal casing, the magnetic field induction particles are filled in the cavity, the magnetic field induction particles mutually generate suction under magnetic field effect, thereby the sample in the magnetic field induction particles can be fixed, and the surface to be measured keeps a horizontal state. The sample fixing device used for testing hardness is suitable for hardness samples with a plurality of sizes and shapes, the operation is simple, the work state is stable, the test result has high repeatability, and the sample fixing device is suitable for fixing the measure samples such as Brinell, Vickers and Rockwell hardometers.

Description

technical field [0001] The invention relates to a sample fixing device for hardness testing and an application method of the sample fixing device. Background technique [0002] The hardness of a material is the ability of the material to resist local deformation, especially plastic deformation, indentation or scratches. It is an important performance index to measure the degree of softness and hardness of the material. . Since the hardness test only produces small indentations in a local area of ​​the metal surface, the damage to the material is small, so the hardness test can be used to check the metal surface state (such as decarburization and carburization, surface quenching), and the surface after chemical heat treatment Hardness etc. Hardness can more accurately reflect the differences in chemical composition, metallographic structure, heat treatment process and cold working of metal materials, so hardness tests are widely used in production, scientific research and e...

AI Technical Summary

Problems solved by technology

In the mosaic method, the mosaic material is generally softer than the metal material, which affects the accuracy of the test results, and the mosaic method is suitable for smaller samples, which has poor versatility, thus limiting its scope of use

However, the fixture method usually has the disadvantages of insufficient pre-tightening force, high requirements for the shape of the sample, and difficulty in fixing.

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