Hardness testing, as applied to various materials, is a valuable mechanical procedure that has been in effect for over 250 years. The test gives critical details around the strength and the effectiveness of the material prior to production. It is an extensive procedure employed in many industries, particularly automotive, aeroscope and quality control, among others.
The Value of Good Practices in the Tests
Good practices are paramount to achieving accurate results, meaning that the right testing techniques must be followed. In a Rockwell test, for instance, which is considered the most accurate hardness testing method, adherence to standards cannot be overstated. Poor execution of the test can give wrong readings and eventually lead to the production of a substandard item. Factors such as the area of the item, the material, specimen thickness, test location, scale limitations and the homogeneity of the specimen must be accounted for.
Factors to Consider
Before starting off with your test, ensure that the specimen and the surface are smooth and clean. A test is critical to establish the level of components and the quality control of the material. The information gathered from the test verifies the structural integrity and heat treatment, meaning that good practices should be followed. Before testing, ensure that the area does not have too much vibration. Otherwise, the performance of the tester and the readings of the hardness could be affected.
Every hardness test is dictated by the microstructure of the specimen, such as the homogeneity, the condition, the material and the size of the parts to be tested. Whichever application you choose, ensure careful preparation and execution.