Rockwell Hard Testing: Reflection Factors And Reporting

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DISCUSSION- The results we obtained through the experiment for metal sample is inconsistent Even though Rockwell hard testing can be a relatively straightforward experiment sometimes we can overlook critical correction factors and surprising number of factors that can lead to having an inconsistent and incorrect reading. 1.Cleanliness of the major parts. we should remove and clean the anvil and the indenter in regular intervals before the use of the machine. Because a small number of debris, dirt or oil can alter the readings by few points 2.Anvils. Sometimes anvils are often overlooked, and this can lead to errors. Anvil surfaces that have been inadvertently hardness tested, surface that have been rough or gouged or surfaces that have been Worn out or ground to a taper can lead to disasters. These surfaces should be lapped together occasionally through service visits to make sure that…show more content…
Because most Rockwell scalers are unable to compensate for the deflection (or movement) under the load. Part deflection is another issue that can cause to have more than just having inaccurate results. It often can cause diamond indenters to break. The deflection caused by dirt typically will result in a low reading. 10.Enviroment-realted cause. Dirt and vibrations are the most often related causes of errors in Rockwell hardness testing. We should avoid grinding the sample in the vicinity of the instrument, especially grinding the sample in front of the Rockwell testers should be avoided thoroughly. If the environment of the location where the instrument has been kept can’t be improved the instrument should be covered when in not use Vibrations can lead to minor errors in the result we obtain. From the impact or the vibration caused due to Dropping a forge hammer in vicinity of the instrument while testing can impact the test

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