工艺过程为：氮化前的准备工作，氮化过程的准备阶段、升温阶段和降温阶段。
The process comprises: the preparation before nitriding, the preparation period, the temperature-rise period and the temperature-fall period of the nitriding process.
工艺过程为：氮化前的准备工作，氮化过程的准备阶段、升温阶段和降温阶段。
The process comprises: the preparation before nitriding, the preparation period, the temperature-rise period and the temperature-fall period of the nitriding process.
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