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目前工业生产中,陶瓷金属化工艺条件的选择大多是经验性设定,对其如何影响金属化过程缺乏认识。针对于此,本文在前期所建立的陶瓷金属化氢炉的瞬态温度场计算模型基础上,考虑辐射和对流作用,计算陶瓷金属化过程中炉内的流动与传热问题,着重讨论了陶瓷件数量、氢气流量等条件对陶瓷金属化氢炉温度场的影响关系。结果表明,陶瓷件数量对同一位置金属化层最高温度影响较小(<2℃),但对炉温均匀性影响很大,不同位置陶瓷金属化层温度相差达到几十摄氏度。炉内加热一段时间后出现温度统一区(z<0.45 m),这一区域内的陶瓷金属化层最高温度几乎不受氢气流量的影响,金属化质量具有更好的一致性。
At present, the industrial production, the choice of ceramic metallization process conditions are mostly empirical set, the lack of understanding of how it affects the metallization process. In view of this, on the basis of the calculation model of the transient temperature field of the ceramic metal hydride furnace established in the previous period, the problem of the flow and heat transfer in the ceramic metallization process is calculated considering the radiation and the convection, and the ceramic The number of pieces, the flow of hydrogen and other conditions on the temperature field of ceramic metallization hydrogen furnace. The results show that the number of ceramic parts has little effect on the maximum temperature of the metallization at the same location (<2 ℃), but it has a great influence on the uniformity of the furnace temperature. The temperature difference of the ceramic metallization at different positions reaches several tens of degrees Celsius. After heating in the furnace for a period of time, the temperature uniform zone (z <0.45 m) appears. The maximum temperature of the ceramic metallization in this area is almost unaffected by the hydrogen flow and the metallization quality has better consistency.