The heat treatment of CNC spare parts usually includes heating, heat preservation and cooling, which is generally carried out after rough machining. CNC parts processing can be divided into cold treatment and heat treatment according to the temperature of parts processing. Processing at room temperature does not cause chemical or phase changes in the part, and this processing is called cold working. The chemical or phase transformation of a part due to manufacture at higher than normal temperatures is called hot working. In the process of processing and producing products, CNC spare parts processing will change the performance characteristics and external structure of materials.
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