Abstract
With molton aluminium, the diffusion of aluminium on carbon steel and special steel at various temperatures between 670° and 800° for 1_??_10 minutes was investigated. From the surface layer of the diffused specimens, the measurement of the depth of penetration, microscopic examination as well as hardness test were carried out. The obtained results are summarized as follow: The diffusion of aluminium on carbon steel differs according to the dipping temperatures and times.
The rate of diffusion increases as the temperature but it is remarkably retard_??_d according to the increase of carbon contents of the specimens. The relation between the contents of nickel and chrom which effects diffusion, is not obvious. In general, the diffusion of aluminium is markedly retarded by the increase in large amounts of nickel content and ison the contrary, accelerated by the addition of large amounts of chrom content.
