Effects of direct current field on powder pack aluminising
Effects of direct current field on powder pack aluminising
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DOI：
10.1179/026708410x12593178265625
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发表时间：
2011-03
影响因子：
2.8
通讯作者：
F. Xie;J. Hu;Z. Zhou;H. Hu;J.H. Li;J. Pan
中科院分区：
文献类型：
--
作者：
F. Xie;J. Hu;Z. Zhou;H. Hu;J.H. Li;J. Pan
为克服常规粉末包渗铝处理温度高、浸泡时间长、渗铝介质利用效率低等缺点，将直流磁场（DCF）应用于渗铝试样和粉末渗铝剂上。采用板状或管状试样作为DCF的阴极。阳极呈板状或柱状，与试样平行。研究了DCF对CPA的影响。研究了处理后合金的显微组织、相、厚度和抗氧化性能。结果表明，即使在低于750℃的温度下，DCF也具有增强渗铝的作用，且节能效果显著。镀铝的外壳使普通碳钢在850℃高温下具有优异的抗氧化性能。本文从DCF对渗铝过程的热效应和非热效应两个方面探讨了DCF对CPA的影响机理。
Direct current field (DCF) has been applied on an aluminising specimen and powder aluminising agents to overcome conventional powder pack aluminising (CPA)'s shortcomings of high treating temperature, long soaking time and low efficiency in utilising aluminising media. The specimen in the shape of plate or tube was taken as cathode of the DCF. The anode in the shape of plate or column paralleled to the specimen. Effects of DCF on CPA have been studied. The treated case's microstructure, phase, thickness and oxidation resistance have been investigated. The results show that DCF has the function of enhancing aluminising with great energy saving, even at a temperature below 750°C. The aluminised case endows plain carbon steel with superior resistance to oxidisation in air at a high temperature of 850°C. Mechanisms of DCF's effects to CPA have been proposed, which were discussed from two aspects of the DCF's thermal and non‐thermal effects to the aluminising process.