Determining the accuracy of hardness testing is related closely to heat-treatment technologies. The history of their relationship is long, contributing much to the progress of heat-treatment studies and technologies. Due to its close relation with material quality, shape, and heat treatment conditions (temperature, time, methods, etc.), hardness testing is given careful attention for controlling materials.rnAlthough it might be easy to perform hardness measurements, defining hardness in precise and simple terms is still a difficult task. Below is a brief review of industrial hardness testing.
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