There are many types of hardness testers, the most commonly used Rockwell, Brinell, Vickers and microhardness testing methods. Rockwell hardness measurement is one of the most commonly used hardness testing methods. It is represented by the plastic deformation of the pressed material under the action of the indenter (diamond cone or hardened steel ball) under load (including preload and main load). Generally, the greater the depth of indentation into the material, the softer the material; the smaller the indentation concentration, the harder the material. Indicates the measurement principle of Rockwell hardness.
The measurement principle of Brinell hardness is to press a quenched steel ball with a diameter of D into the surface of the specimen and keep it for a certain period of time, then remove the load, measure the indentation diameter d of the steel ball on the surface of the specimen, and calculate the indentation area. , calculate the ratio of load to indentation area, the hardness represented by this ratio is Brinell hardness, represented by the symbol HB.
Technical parameters of hardness tester
Initial test force: 10kg
Rockwell test force: 60kg, 100kg, 150kg
Brinell test force: 62.5Kg, 125Kg, 187.5Kg
Afterburner method: screw afterburner
Indenter: 120° diamond indenter
Ф1.588mm, Ф2.5mm, Ф5mm carbide balls
Rockwell hardness HRC, HRB, HRA and other 15 scales
Brinell hardness HB 30, HB 10, HB 5, HB 2.5 four test conditions
Resolution: 0.5HRC
Accuracy: in line with standards GB/T230/231, ISO6506/6508, ASTM E18/E10
Application: All metals, including steel, forged steel, cast iron, bronze, brass, copper, aluminum alloy, aluminum, etc.
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