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分析了Q2 35钢渗铝层的显微组织 ,并对其耐高温氧化和热腐蚀性能进行了研究。能谱分析 (EDS)结果表明 ,热浸渗铝层由表层纯铝层和内层 η相 (Fe2 Al5)组成 ,经扩散退火后 ,渗层组织由表及里依次出现 η相 (Fe2 Al5)、ζ相(FeAl2 )、β2 相 (FeAl)、β1相 (Fe3Al)和固溶体α相。高温氧化和热腐蚀试验结果表明 ,渗铝Q2 35钢的耐高温氧化性能和1Cr18Ni9Ti奥氏体不锈钢相当 ,而耐热腐蚀性能明显优于后者
The microstructure of Q235 steel was analyzed and its high temperature oxidation and hot corrosion properties were studied. EDS results show that the hot-dipped aluminized layer consists of the outer layer of pure aluminum and the inner layer of n-phase (Fe2Al5). After diffusion-annealing, , Ζ phase (FeAl2), β2 phase (FeAl), β1 phase (Fe3Al) and solid solution α phase. The results of high temperature oxidation and hot corrosion test show that the high temperature oxidation resistance of Q235 steel is equivalent to that of 1Cr18Ni9Ti austenitic stainless steel and the hot corrosion resistance is obviously better than that of 1Cr18Ni9Ti austenitic stainless steel