How to prevent decarburization of spiral welded pipe?

To solve the problem of decarburization on the surface, it is mainly to deal with the heat treatment process, because the decarburization and oxidation of the spiral welded pipe are carried out at the same time, so during the heat treatment process, the spiral welded pipe should be kept away from air as much as possible. This can improve the decarburization phenomenon.

The medium that causes decarburization on the surface of the spiral welded pipe is mainly oxidizing gases such as oxygen, water vapor, and carbon dioxide. When these gases come into contact with the heated spiral welded pipe, it will cause oxidation and decarburization of the spiral welded pipe. Therefore, it is also very important to control the ratio of carbon dioxide and carbon monoxide in the furnace.

In fact, it is also very effective to add protective gas to the spiral welded tube forging furnace. Nitrogen can disperse certain oxidizing gases and reduce the decarburization of the spiral welded tube.