In the precision machining process route such as PVD Coating Precision Instrument Housing, the heat treatment process is often arranged. The position is arranged as follows: heat treatment process to improve the metal cutting performance, such as annealing, normalizing, tempering, and total layout before processing. In order to eliminate internal stress, such as aging treatment, adjustment treatment, such as the general layout, after roughing, but before completion. In order to improve the mechanical properties of the parts, such as carburizing, quenching and tempering, the total arrangement after processing. If the deformation is large after heat treatment, but the final processing is also arranged.
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