The heat treatment process of forged flanges generally includes the following steps: heating (step by step heating) : The forged flanges are put into the heating furnace, and the temperature is raised step by step to reach a predetermined temperature. During the heating process, the heating speed and temperature uniformity should be controlled to avoid too fast or too slow heating rate, so as not to cause deformation or uneven organization. Heat preservation: After reaching the predetermined temperature, keep heat preservation for a certain time. The holding time varies according to the size of the flange, the material and the heat treatment requirements, and usually enough time is needed to make the internal temperature uniform and complete the corresponding organizational transformation. Cooling (tempering) : After heat preservation, the forged flange is removed from the furnace for cooling treatment. There are many options for cooling methods, such as water quenching, oil quenching, gas cooling, etc. The specific choice of cooling method needs to be determined according to the material, hardness requirements and heat treatment process specifications of the forged flange. Temperature control: Depending on the specific heat treatment requirements, temperature control may be required, such as tempering treatment. Tempering is to reheat the forged flange after quenching to a lower temperature, maintain a certain time after cooling, in order to eliminate quenching stress, improve the toughness of the material, and adjust the final material hardness and structure. In short, the heat treatment process of forged flanges needs to be reasonably designed and controlled according to the characteristics of the specific material, product requirements and relevant standards to ensure that the forged flanges achieve the specified mechanical properties, organizational structure and durability. In actual operation, strictly abide by the heat treatment process specifications, and closely monitor the temperature, time and cooling mode and other parameters, is an important link to ensure the quality of forged flange.
