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无氧化、不脱碳的中性热处理氮基气氛,一般是在高纯氮气中添加适量的碳氢化合物和含氧介质,直接引入热处理炉中使用;或者用纯度99%以下的工业氮气添加适量的碳氢化合物,在一定温度和催化剂作用下经气体发生器制备保护气。为了避免一般钢铁工件加热过程中氧化,起保护作用的炉内气氛应具有一定的还原性。然而,要使工件加热过程中不出现表面碳势的变化,这种气氛还必须具有一定的碳势,使之与加热工件的表面碳势相平衡。因此,炉内气氛应含有一定量的 CO 和 H_2。当使用的氮气纯度甚高(>9.99%)时,原
Non-oxidizing, non-decarburization of the neutral heat treatment of nitrogen-based atmosphere, usually in high purity nitrogen gas to add an appropriate amount of hydrocarbons and oxygen-containing medium, directly into the heat treatment furnace used; or industrial nitrogen purity of 99% Of hydrocarbons, at a certain temperature and catalyst by the gas generator to prepare protective gas. In order to avoid the oxidation of steel parts in the heating process, the protection of the furnace atmosphere should have a certain degree of reduction. However, in order to prevent the change of the surface carbon potential during the heating process of the workpiece, the atmosphere must also have a certain carbon potential that is in balance with the surface carbon potential of the heated workpiece. Therefore, the atmosphere in the furnace should contain a certain amount of CO and H 2. When the nitrogen purity is very high (> 9.99%), the original