Abstract: We’ve designed new quick-nitriding processes-----cyclic Two-Stage “C-TS”, pre-strongly absorbing nitrogen-pulsating “PS-P” and double “DB” on the base of chemical thermodynamics and kinetics, surface science, internal diffusion theory and inter-promotion mechanism of some elements in diffusion. Using these processes, no catalyst and new equipment are added, not only can we save time and therefore economize on energy and material, but also get good effect. These processes have been used in production successfully, and large profit has been made. The new processes are suitable to specialized nitriding steel as 18CrMoAiA, as well as to 42CrMo, 40Cr, 30CrMnTi and 23Mn3V2Al, etc. The application future of these new processes is very bright.

Key words: 扩散, 渗氮