In ion nitriding processing work must grasp the following process can have a good nitriding effect, under to tell everyone in the work of the ion nitriding heat treatment which three considerations are there?
First, before the furnace charging artifacts should be clean and dry, make sure the workpiece is put in the process of furnace charging is uniform, and ensure that each artifact of Yin and Yang has more than 30 mm distance. Can prevent the poles too close between the current density is too large, let the non-homogeneous partial high temperature lead to nitride, and current are also produces the fixed-point arc welding effect, etc.
Secondly, working in the heating and heat preservation, breather valve closed after the first put the water into the vacuum pump, the butterfly valve opened, furnace temperature rising slowly at the same time also want to gradually increase for ammonia. To after the workpiece reach specified temperature, be sure to ensure current, extraction rate, for the amount of ammonia in the furnace the balance between the three.
Finally, when heat preservation to cool the actions will be taken after the scheduled time, into the furnace supply within a large number of cooling water, furnace body completely after cooling can close vacuum pump and high pressure, etc.