How to prevent decarburization behavior of thick walled steel pipes?

The media that cause decarburization on the surface of thick walled steel pipes are mainly oxidizing gases such as oxygen, water vapor, and carbon dioxide. When these gases come into contact with the heated spiral tube, they will cause oxidation and decarburization of the spiral tube. Therefore, controlling the ratio of carbon dioxide and carbon monoxide in the furnace is also very important. In fact, adding protective gas nitrogen into the forging furnace of thick walled steel pipes is also very effective for Linyi Tianyou Steel Pipe. Nitrogen can disperse certain oxidizing gases and reduce the decarburization phenomenon of spiral pipes.

The service life of thick walled steel pipes is related to the surface decarburization of precision pipes. If the surface decarburization occurs, the strength and wear resistance of the spiral pipe will decrease, directly affecting the service life of the spiral pipe. If the decarburization layer on the spiral tube is not cleaned thoroughly, the surface hardness and wear resistance of the spiral tube will also decrease accordingly, and during quenching, cracks will form on the surface of the workpiece due to changes in the volume of the inner and outer layers.

How to prevent decarburization of thick walled steel pipes? Here is the answer: To solve the problem of surface decarburization, it is mainly necessary to treat the heat treatment process, because decarburization and oxidation of the spiral tube are carried out simultaneously. Therefore, during the heat treatment process, thick walled steel pipes should be kept away from air as much as possible, which can improve the decarburization phenomenon.