I have a nitrogen-filled oven with a high temperature of 400 degrees, which is used to bake metal products. Why does it still turn yellow when baked? qq:2496 19704

According to the analysis upstairs and the questioner's statement, their products will not appear on the first floor. According to (HOCHECK company information), there are the following possibilities:

The purity of nitrogen is not enough. I don't know whether the high-purity nitrogen or the nitrogen generator produces nitrogen by itself (the purity of nitrogen in the second method is usually very low);

There is residual oxygen on the metal surface, so the heating rate should not be too fast, and you can choose to heat it step by step;

The design of nitrogen furnace (equipment) is not very good, which can be judged from the following points:

① First, the nitrogen furnace must be fully welded;

Secondly, if there is a blower, the seal of the blower part should be sealed;

(3) Thirdly, whether the door seal is made of silicone rubber or not, if it is not silicone rubber, it will leak and air is likely to run in.

The above information comes from HOCHECK, I hope it can help you.