Rockwell hardness (HR)
Use a diamond cone (HRC) or hardened (tungsten) steel ball indenter (HRB, etc.) to press the surface of the material to be tested with a preload of 10 kgf and a main test force of 60, 100, or 150 kgf.Surface Rockwell hardness (HR)
According to the set scale, a diamond cone or hardened (tungsten) steel ball indenter is pressed into the surface of the material to be tested. Surface Rockwell measurement applications have smaller force values ​​and produce shallower indentations, which are often used in relatively fragile and very thin materials.
The preload is 3kgf and the main test force is 15, 30, or 45kgf.Vickers hardness (HV)
A square tapered diamond indenter having an opposite surface angle of 136° was pressed into the surface of the material to be tested with a test force of 1-120 kgf.
The indentation uses a microscope or USB camera for video observation and measurement.Micro Vickers hardness (HV)
A square tapered diamond indenter having an opposite face angle of 136° is usually pressed into the surface of the material to be tested with a test force of not more than 1 kgf.
Indentation uses a precision microscope or a high-resolution USB camera for video observation and measurement.
The 600x magnification is the most common, and the 1000x magnification is becoming more and more widely used.Knoop hardness (HK)
The elongated diamond vertebral body is usually pressed into the surface of the material to be tested with a test force of not more than 1 kgf.
Indentation uses a precision microscope or a high-resolution USB camera for video observation and measurement.
The magnification of 600x is the most common.Brinell hardness (HB)
Carbide balls or carbonized steel balls each having a diameter of 1, 2.5, 5 or 10 mm are pressed into the surface of the material to be tested with a test force of 1 - 3000 kgf.
For relatively large indentations, a microscope or USB camera is used for video observation and measurement.Leeb hardness (HL) (rebound mode)
Portable hardness test. It uses a certain mass of impact body with a tungsten carbide ball head to impact the surface of the test piece under a certain spring force. This impact force causes plastic deformation of the surface of the material to be tested, forming an indentation. The impact body loses its original speed (or energy).
Therefore, the softer the material to be tested, the more speed the impact body loses during the rebound. The Leeb hardness can be applied to a wide range of parts and there are few test requirements to follow.Ultrasonic Hardness Test (UCI)
Portable hardness test. A Vickers-shaped diamond indenter is fixed on an oscillating rod and applied to the surface of the material to be tested with a certain force value, and then its damping effect is analyzed according to the ultrasonic vibration to measure the hardness value of the material.
Ultrasonic hardness testing is often used for smaller, thinner parts that cannot be tested with a rebound hardness tester.Shore hardness (SHORE)
Portable (rubber/plastic) hardness test. The Shore hardness is made by using a steel presser with a certain shape and pressed vertically into the surface of the sample under the test force. When the surface of the presser foot is completely adhered to the surface of the sample, the tip end surface of the presser needle has a certain extension relative to the plane of the presser foot. The length (ie, the depth at which the needle is inserted into the object to be tested) is expressed by the magnitude of the length.
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