A metal hardness tester is an instrument used to measure the hardness of metal materials.

Hardness is an important indicator for measuring the ability of metal materials to resist local deformation, especially plastic deformation, indentation, or scratches. A metal hardness tester applies a certain amount of pressure, impact force, or other forms of action to metal materials through specific testing methods and principles, and then evaluates the hardness value of the metal based on parameters such as the size, depth, and rebound height of the indentation produced.

Common types of metal hardness testers include Brinell hardness tester, Rockwell hardness tester, Vickers hardness tester, Leeb hardness tester, etc.

The Brinell hardness tester determines hardness by measuring the indentation diameter and is suitable for measuring softer metal materials. For example, used to measure steel that has not been quenched.

The Rockwell hardness tester measures the indentation depth to obtain the hardness value and has a wide range of applications. For example, it can be used to measure quenched steel parts.

The Vickers hardness tester uses a regular pyramid diamond indenter to press into the surface of the material, and calculates the hardness by measuring the diagonal length of the indentation. It is suitable for measuring the hardness of thin parts and surface hardening layers.

The Leeb hardness tester is a portable hardness tester that calculates hardness by using the ratio of the rebound velocity to the impact velocity of an impactor after impacting a metal surface. Commonly used for on-site hardness testing of large workpieces and difficult to disassemble components.

Metal hardness testers have wide applications in materials science, mechanical manufacturing, quality inspection, and other fields, which can help determine the performance and quality of metal materials, provide important basis for material selection, processing technology formulation, and product quality control.

For example, in automobile manufacturing, the hardness of components is measured using a metal hardness tester to ensure compliance with design requirements and quality standards; Evaluate the impact of different compositions and processing techniques on the hardness of metal materials in research and development.