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过去的35年中在气氛控制问题上已进行过艰苦工作的人们都知道:对于一定的气氛如欲获得一定的效果,表面活性或惰性的问题是十分重要的。大多数对氮化有经验的人都知道假如金属表面光洁度太高,氮化过程将是既慢又只是呈斑点状,甚至根本不能氮化,当在某些边界情况下,在加热到氮化温度的升温阶段,高露点氨的侵蚀效果可使金属表面活化。而相反在正常情况下用干燥的氨冲刷冷态的工件,然后在干
People who have worked hard on climate control over the past 35 years know that for some atmosphere to be effective, the issue of surface activity or inertia is very important. Most people who are experienced in nitriding know that if the metal surface finish is too high, the nitriding process will be both slow and spotty, or even not nitriding at all. At certain boundaries, heating to nitriding The temperature of the warming stage, the high dew point ammonia erosion effect can make the metal surface activation. On the contrary, the dry workpiece is washed off with dry ammonia under normal conditions and then dried