In the machinery manufacturing industry, hardness testing is often used to check the effects of final heat treatment. In fact, hardness testing is also a very important means for quality control in process management and production.
For some parts that have not been heat treated, in order to avoid mixing and wrong materials, hardness testing should be carried out. In the processing process, in order to avoid the performance change caused by annealing caused by excessive cutting processing, hardness testing is also applied to supervise.
Since there is a certain correspondence between metal hardness and strength, hardness testing has wider practical significance.
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