Description
Universal Hardness Testing for research and industry.
Overall View:
Hardness test, which is done in different ways, is considered as a part of none-destructive
tests. The hardness test is performed as an indentation and this test
model is often performed by impacting a sample that is placed on a rigid support.
A mandrel with a fixed and specific shape presses on the sample under static load.
Depending on the type of test, the hardness is expressed with a number that is
inversely proportional to the depth of the effect caused by the specific load and
mandrel; In other words, it is proportional to the average load on the effect surface.
The usual methods of Rockwell, Brinell, and Vickers hardness test.
٭ Hardness measurement by Brinell method (HB): In this method, a spherical
shot (pellet) with a standard diameter is pressed on the surface of the sample
and finally the hardness is determined by measuring the average diameter of
the effect under a microscope.
٭ Hardness measurement by Vickers method (HV): In this method, an object
in the form of a square-base pyramid, where the angle between the opposite
faces of the pyramid is 136 degrees, is used, and finally, the average diameter
of the effect is measured under a microscope and the hardness is determined.
٭ Hardness measurement by Rockwell method (HR): It is used to measure the
hardness of relatively hard materials and there are fifteen types. For example,
shot (pellet) Rockwell applies force with the help of shots, and diamond Rockwell
applies force on the surface of the sample with the help of a diamond.
Finally, the hardness value is shown from the depth of penetration.
Related
Specifications
SUH-200 hardness tester machine is capable of testing metals hardness in Rockwell (direct measurement), Vickers and Brinell (indirect measurement).in Rockwell direct method the indenter penetration depth is directly measured by the machine and hardness displayed. In indirect method the indenter mean diameter or diagonal of impression should be measured by auxiliary equipment and hardness calculated. The load is applied by means of a highly accurate servo mechanical mechanism with advanced control where the load is measured by a very accurate load cell providing variety of test methods: Rockwell (15 methods), Rock well Superficial (15 methods), Vickers (8 methods), Brinell (24 methods) up to 200 kgf by SUH-200.
All types of standard indenters can be installed for different hardness test methods.Different anvils are available for holding various parts. Statistical reports of latest tests are obtainable with all test parameters selected and observed on the touch screen display.
With accuracy as a percentage of reading0.5% applied load(50 grf max error) and 0.05 micrometerresolutionfor general indenter displacement .In additionto thepreviously mentionedthe machine has 0~300mm stroke and 200mmdepth forspecimen installation.
There are other options like: Internal memory for recording test data up to 40000 tests, RS-232 port for data transfer to PC and USB port for saving data to storage memory (transfer data to USB flash drive) and calibration instrument.
A Rockwell C indenter with a round flat 98mm anvil and a gauge block are among the machine accessories.
Related
Applications
SUH-200 is applied in metals hardness testing in Rockwell, Vickers and Brinell methods in ambient temperature. It is also widely used in different fields of research, quality control..
To name a few:
– Research on abrasion and machining
– Metal alloys quality control
– Research on applied force on surface and metals surface resistance
– Quality control of metallic products like bars, profiles, pipes, plates…
– Hardness control after heat treatment, coating and welding processes.
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