Once decarburization occurs during the production process of steel pipes, it will affect the subsequent process and reduce the high-quality performance and service life of the steel pipes themselves, so manufacturers usually take appropriate measures to avoid or solve this problem.
Generally speaking, there are two ways to avoid decarburization. One is the most commonly used and simplest way, that is, to use the protective property of nitrogen to maintain the pressure in the furnace. Production workers can add or spray neutral nitrogen into the furnace in proportion, which can not only prevent the entry of impurities that will decompose into oxygen and water vapor from the outside but also effectively disperse the existing oxidizing gas in the furnace. Without the reaction medium with the carbon element on the surface, decarburization will not occur, and the area of decarburization can be reduced. Another method is to control the carbon dioxide content in the furnace according to the balance point of workpiece manufacturing. According to expert research, if the balance point in the furnace is higher than the content of carbon dioxide and other oxidizing gases, then decarburization and oxidation will not occur; if the carbon dioxide content is equal to the balance point, a neutral result will be shown, that is, neither decarburization nor oxidation; the last result is also the main cause of decarburization, that is, the oxidizing gas content in the furnace is already higher than the balance point, so to avoid decarburization, the balance point must be calculated based on the temperature and carbon content inside the workpiece, and then the oxidizing gas content in the furnace is controlled.
Post time: Jan-15-2025