Rockwell hardness tester is widely used in metal material testing and quality control. In the field of material testing, the rockwell tester for sale is used in most cases to test the hardness of metal materials, thereby determining the strength, toughness and other properties of the material. In practical applications, choosing the right Rockwell hardness tester for sale can ensure the measurement accuracy and can be fast and convenient. The portable Rockwell hardness tester manufactured by Shenyang TX Testing Instruments, one of the leading rockwell hardness tester suppliers, is particularly suitable for use in the field hardness testing.
The principle of Rockwell hardness tester for sale is by pressing a specific shape of the indenter (usually a 120° diamond indenter or other diameter carbide ball indenter) into the surface of the material under the specified test force.
The test force is usually divided into initial test force (F0) and total test force (F0 + F1), wherein the main test force F1 is removed after the total test force is held by rockwell tester for sale for a certain time, and the pressing depth is measured when the initial test force F0 is retained.
The hardness is characterized by the difference between the pressing depth under the total test force and the pressing depth under the initial test force, that is, the residual pressing depth. The larger the residual pressing depth is, the lower the hardness is. Conversely, the smaller the residual pressing depth value, the higher the hardness value.
Rockwell metal hardness tester includes desktop type and portable Rockwell hardness tester. The desktop Rockwell hardness tester is usually used in laboratory, and the portable Rockwell hardness tester can be hand-held to do the on-site testing directly.
Select the appropriate combination of the indenter and test force of the rockwell hardness test equipment by TX hardness tester company according to the different material. For example, the commonly used Rockwell HRC scale requires a diamond indenter and 150kgf total test force to test the hardness range of 20-70HRC.
According to the basic principle of Rockwell test, the pointer starts from 0, first apply the initial test force for the portable Rockwell hardness tester, adjust the drum engraving, and adjust the reading angle, continue to apply the total test force, hold for about 5 seconds, unload the total test force to the initial test force, then read the Rockwell hardness value.
Rockwell metal hardness tester can directly read the hardness value, the test is rapid, accurate, and the indentation is small, which can be regarded as non-destructive testing, and the batch of finished and semi-finished workpieces can be tested piece-by-piece at the production site.
The calibration of Rockwell hardness tester generally requires the rockwell hardness tester manufacturers or professional calibrators to operate. Calibration requires the use of standard Rockwell hardness calibration block, by measuring the standard hardness block to calibrate Rockwell test force and the accuracy of the hardness value.
There are three types of standards for Rockwell hardness test in the world. One is ISO 6508, one is ASTM E18, and then there is ASTM E110, which is specifically for portable hardness tester.
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