摘要
为了节能、快速共渗铝硅,以45钢为基材,在介质与试样间施加一定强度直流电场,进行固体粉末铝硅共渗,并对处理试样的高温抗氧化性和耐蚀性进行研究。采用金相显微镜和XRD分析了铝硅共渗层的组织特点;在800℃下,研究了渗层的抗氧化性能;于10%H2SO4中研究了渗层的耐蚀性。结果表明:直流电场可降低铝硅共渗加热温度,提高渗速;直流电场条件下获得的铝硅共渗层组成相主要为Al0.7Fe3Si0.3和AlFe3,渗层具有良好的高温抗氧化和耐腐蚀性能。
45 steel was used as the substrate for co-permeation of Al and Si powders while a certain intensity of direct current field was applied between the medium and to-be-modified samples.The high-temperature oxidation resistance of the co-permeated coating at 800 ℃ was evaluated,and its corrosion resistance in aqueous solution of 10% H2SO4 was examined.The microstructure and phase composition of the co-permeated coating were analyzed by means of optical microscopy and X-ray diffraction.Results show that applying direct current field helps to decrease the temperature for Al-Si co-permeation and increase the co-permeation rate.As-prepared Al-Si co-permeated coating mainly consisted of Al0.7Fe3Si0.3 and AlFe3,and possessed good high-temperature oxidation resistance as well as corrosion resistance.
出处
《材料保护》
CAS
CSCD
北大核心
2011年第9期73-75,94,共3页
Materials Protection
基金
江苏省研究生创新项目(SCZ100431322)资助
关键词
粉末铝硅共渗
直流电场
抗氧化性
耐腐蚀性
45钢
co-permeation of Al and Si powders
direct current field
oxidation resistance
corrosion resistance
45 steel
