First, an appropriate amount of ammonia gas should be introduced into the stainless steel vacuum-sealed canister of the aluminum nitride sintering furnace and heated to over 500°C. During a suitable period, the nitriding furnace can allow the workpiece surface to form a nitrogen-containing reinforced layer according to the material and the desired diffusion layer, resulting in high hardness, excellent wear resistance, and good durability.
Specific operating steps:
- The molds must undergo normalizing or tempering treatment before nitriding.
- Clean the surface of each workpiece using gasoline and alcohol, ensuring there is no oil or other contamination.
- After loading into the furnace, symmetrically tighten the furnace lid bolts.
- Connect the furnace canister and furnace lid water inlets to a cooling water circulation system. The lower end of the furnace lid pipe is for water inlet, and the upper end is for water outlet. The furnace canister has a separate water inlet and outlet. All pipes inside the furnace lid should be connected following the principle of low inlet and high outlet, keeping water inlet and outlet ports separate.
- Before heating, nitrogen should be purged. At this stage, the exhaust flow should be more than twice the normal operating flow.
This is the specific operating method for the aluminum nitride sintering furnace nitriding process shared by Dingsheng Thermal Technology, which we hope will be helpful to all users.