Study on Microstructure and Infiltration Process of Hot-dip Aluminizing Layer on 45 Steel Surface
The Fe-Al intermetallic modified layer on 45 steel surface was prepared by hot-dip technology with pure Al.The morphology of the modified layer was observed by SEM,the chemical composition and phase composition was analyzed by EDS,and its combination strength was also measured.The results show that the modified layer consists of deposition layer and diffusion layer,and mainly contains FeAl,FeAl2 and Fe2Al5 phases.And it performs good combination between the modified layer and the matrix.The optimum technical parameter is diffusion for 2 h and hot-dip for 3 min.