Abstract:

Combining heat and kinetic energy together, mechanical energy aided aluminizing processes can decrease heating temperature and reduce heating time. This technique could form a 100μm thickness aluminized layer on surface of steel samples only by treatment at 600℃ for 180 min. Experimental results showed that rolling in the energy aided aluminizing increased the probabilities of contacts between the aluminizing agent and the sample surface, and between ingredients in the aluminizing agent. The friction between the grain and the sample could clean the surface of the samples, increase the surface activity, and accelerate the reaction and nucleation rate of Al atoms on the surface. The diffusion layers could be formed at a lower temperature due to the diffusion active energy decrease resulting from production of a great deal of crystal defects by shocking the grain agents.

Key words: rolling; mechanical energy aided aluminizing; surface activity