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您的检索式：作者名="Nabil Tarfa"
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| 1 | Attaining the Steady State of the Nitriding Potential after a Change of NH_3 Atmosphere Flow Rate during the Gas Nitriding Process显示文摘In single and multi-stage nitriding processes, each stage is characterized by the following parameters: temperature and time, type and composition of incoming atmosphere, as well as the set value of the nitriding potential. In the case of an atmosphere composed of raw ammonia and dissociated ammonia (NH3 - NH3cKss), the set value of the nitriding potential can be achieved by a change of the incoming atmosphere make-up, while in the case of atmospheres comprising NH3 and NH} -N2 - by a change of the atmosphere flow rate. The time needed to reach a stabilized state, after the initiation of a change in the atmosphere gas mix can be assessed relatively easily. The problem is much more complex if we want to predict the time of reaching a new stabilized state following a change in atmosphere flow rate. The time of reaching stabilized state is, in this case, a complex function of the flow rate of the atmosphere which forces the potential change, and of temperature. This problem, in the case of the NH3 type atmosphere, is the subject of investigation in this work. Factors are discussed, affecting the rate at which stabilized state is reached by the system after the introduction of a disturbance, necessary to attain the required nitriding potential. | Jerzy Michalski Jan Tacikowski Piotr Wach Tomasz Babul Nabil Tarfa | 2004 | 材料热处理学报2004，25，5： | 0 |
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