Method for activation the thermo-chemical alloy steels to the process gas nitriding or ferritic carbonitriding in fluidised bed furnaces

摘要

method of activation cieplno - chemical steel alloy to process gas azotowania or wu0119gloazotowania ferrytycznego kiln fluidalnym with retortu0105 advantageously done with austenitic steel chromo - nickel and filled with elektrokorundem fluidyzowanym through distributor performed equally b with austenitic steel, characterized by that,that retortu0119 furnace heats up to the temperature 490u00b0c 410 - and fluidyzuje atmosphere technology in the form of ammonia and / or ammonia with the addition of propane of 0.5 - 5% by volume. placed in a machined components in time from 25 to 120 min, after which is machined elements from fields in air to oxidize during podstudzania.then placed them in fluidised bed furnace combustion temperature or other azotowania wu0119gloazotowania from 530u00b0c to 590u00b0c on time depending on the required thickness layer hardened or zone compounds, and thereafter machined elements removed from the furnace and cooling in after wietrzu, or well using compressed airor in front of the furnace retort with fluidalnym bed under the protection atmosphere technology.