零件机加工工艺中的热处理 零件机加工工艺中的热处理，一般可以分为预备热处理和最终热处理这两种。 预备热处理：其目的是为了改善机械性能、消除内应力，以便为最终热处理做好准备，一般包括退火、正火、调质和时效处理等这些工艺。进行预备热处理，一般是在粗加工之后。
Heat treatment in part machining process heat treatment in part machining process can generally be divided into preparatory heat treatment and final heat treatment. Preliminary heat treatment: its purpose is to improve mechanical properties and eliminate internal stress, so as to prepare for final heat treatment, generally including annealing, normalizing, quenching and tempering and aging treatment. Preliminary heat treatment is generally carried out after rough machining.
最终热处理：其目的是为了提高零件的硬度和耐磨性能，包括淬火、渗碳、氮化等工艺，一般是在半精加工之后、精加工之前进行的。
Final heat treatment: its purpose is to improve the hardness and wear resistance of parts, including quenching, carburizing, nitriding and other processes, which are generally carried out after semi finishing and before finishing