EFFECT OF ALUMINIUM AND BORON ON SURFACE MODIFICATION OF SOME MATERIALS
(Mechanical Engineering Department Xiangtan University Xiangtan 411105)
Abstract: The surface modification of some materials(45, T8, 5CrMnMo, 3Cr2W8V) in fused borax bath added with aluminium oxide powders and reductant was Probed. The results showed that with proper salt composition and technical parameters, and B/Al ratio 1.3～3. 2 in salt bath, the boron atoms and aluminium atoms can co-diffuse in steels, thus an ideal B-Al co-diffusion layer can be obtained which contains ferro-boron phases and ferro-aluminium phases and ensues surface modification in steels.
Key words: Al-B co-diffusion microstructure co-diffusion layer surface modification