Flanges are generally large and small, and the maximum size can reach 80 inches. In the production of large flanges, the performance of large flanges is very important, so we should pay attention to the factors affecting them. There are many reasons, including the heat treatment temperature when forging large flanges (mainly the annealing temperature here). Unreasonable temperature control is easy to lead to failure to achieve effective treatment and other results. In the process of operation, pay special attention to the minimum temperature of 55 and the maximum temperature of 70. The return treatment during the heat treatment of large flanges is sometimes called solution heat treatment. Generally, solution heat treatment is adopted. According to the standards of large flanges, the specific temperature range involved will be different. Pay attention to the degree of white during operation. The second important factor is the pressure problem in the treatment of large flanges. Protective gas is generally required in heat treatment, so we should pay attention to its pressure and avoid leakage. In most cases, the protective gas is pure hydrogen. Finally, it should be noted that the heat treatment furnace for processing large flanges should pay attention to sealing. The shell is welded with steel plate and section steel. The trolley is welded with section steel and steel plate. The trolley reduces the loss of heat radiation and convection through soft contact with the furnace lining and sand sealing mechanism, so as to effectively ensure the sealing of the furnace body. When annealing, it should be kept sealed to prevent oxygen and water vapor. Check the sealing property with foam water at the pipe. These factors are the most important factors affecting the production of large flange. In addition, there are some factors that will cause influence, such as the quality of raw materials, machining links, surface treatment, etc. of large flange, but the influencing factors in heat treatment are the main factors that mainly affect the performance of large flange.
