Feature
●Indenter HRC-3
Description
Two kinds of packing box: white or red(randomly)
Specification
Model: HRC-3
Angle a = 120°
Indicated value HRC R = 0.2
Material: Diamond + Metal
Application: Rockwell hardness tester
Package Included: 1 x Diamond Rockwell Indenter
Rockwell hardness (HR)
When HB>450 or the sample is too small, the Brinell hardness test cannot be used instead of the Rockwell hardness measurement. It uses a diamond cone with a apex angle of 120° or a steel ball with a diameter of 1.59, and is pressed into the surface of the material to be tested under a certain load, and the hardness of the material is determined from the depth of the indentation. According to the hardness of the test material, it is represented by three different scales:
HRA: It is a hardness obtained by using a 60kg load and a diamond cone indenter for materials with extremely high hardness (such as cemented carbide).
HRB: It is a hardened steel ball with a load of 100kg and a diameter of 1.58mm. The hardness is used for materials with lower hardness (such as annealed steel, cast iron, etc.).
HRC: is the hardness obtained by using a 150kg load and a diamond cone indenter for materials with high hardness (such as hardened steel). This diamond indenter is suitable for Rockwell HRA/HRC hardness
Rockwell diamond indenter discrimination method
1) Visual inspection method: Firstly, visually observe whether the diamond portion of Rockwell diamond indenter has obvious cracks, if it is measured, the Rockwell diamond indenter is damaged;
2) Using the nail test method: use the surface of the nail to gently rub against the apex angle of the Rockwell diamond indenter and rub it back and forth several times. If the surface of the nail is not deep, the Rockwell diamond indenter is good, and vice versa;
3) Use the instrument to magnify the observation method: use the optical projector or image measuring instrument and the tool microscope to enlarge the apex angle of the Rockwell diamond indenter by 10 or 20 times, and observe whether the apex angle of the Rockwell diamond indenter is still a complete 120 degree apex angle. If the apex angle of the Rockwell diamond indenter is cracked or blunt into a rounded corner, the Rockwell diamond indenter is damaged and needs to be replaced.
If the Rockwell diamond indenter is judged by the above three methods, it means that there is a problem inside the HR-150A Rockwell hardness tester, which needs to be sent to the factory for repair or professional repair.