What are the specific steps of the Rockwell hardness tester?

- Jan 24, 2019-

The Rockwell hardness test uses three kinds of indenters and six kinds of test forces. It can test almost all common metal materials from very soft to very hard. It can be said that the application range is very wide, but you can know the digital Rockwell hardness. What are the specific steps of the operation? Place the specimen or test block on the digital Rockwell hardness tester and adjust the dial so that the large pointer points to the "C" point. Turn the experimental force selection button 6 to the corresponding experimental force of the scale required for your experiment. While looking at the hardness indicating plate, turn the rotating wheel clockwise to raise the screw, first make the sample and the diamond indenter slowly contact, and then continue to rotate the rotating wheel until the hardness scale pointer (large pointer) turns three times, the initial experimental force pointer ( Small pointer) points to the red marker. (Apply initial test force) If the hardness pointer deviates from the "C" zero position after three turns, it is allowed to shift the scale "C" zero position on the dial to the alignment large pointer within the range of "C" ± 5 HR. zero. In addition, after the hardness meter scale pointer stops moving, the time for maintaining the experimental force is entered, and the holding time is over, that is, the experimental manipulation handle 8 is smoothly pulled without impact to the front of the hardness tester, thereby removing the main experimental force. Finally, after the main experimental force is removed, the Rockwell hardness value on the scale indicated by the pointer on the dial can be read. After the hardness value is read, the rotary screw can be rotated counterclockwise to lower the lifting screw, and the initial test force is removed. Cover the machine with a dust cover.