From the point of view of the production process of the China malleable iron pipe fittings, the annealing process is an important technology. It has an important influence on the production of the whole malleable steel pipe fittings. Annealing process is needed to improve the quality of pipe fittings and meet the quality requirements. According to the characteristics and quality requirements of malleable steel fittings, the process characteristics and process flow should be mastered in the application of annealing process and carried out in accordance with the annealing process. Therefore, we should combine the actual production of Malleable Steel Pipe Fittings, analyze the annealing process comprehensively, to ensure that the production can achieve the expected goal.
1. Analysis of heat treatment process
(1) Heat treatment process for malleable ironBased on the production needs of steel pipe fittings, how to improve the production quality and ensure the whole production link can meet the production requirements has an important impact on the whole pipe fittings production. According to the current production situation of malleable steel pipe fittings, heat treatment is needed to improve the quality of maldear pipe fittings. In the heat treatment process, it is necessary to adopt the methods of heating up, high insulation, cooling, low insulation, air cooling, etc. Complete the whole heat treatment process, so that the entire malleable steel pipe fittings in production can achieve the expected goal, improve the production quality of malleal pipe fittings. Therefore, in the production process of malleable steel pipe fittings, heat treatment should be carried out according to the process requirements of heat treatment.
(2) High temperature selectionIn the heat treatment process, in order to protect the quality of heat treatment, it is necessary to strictly control the temperature. Taking into account the characteristics of the malleable iron pipe fittings and the requirements of its own properties, as well as the specific requirements of the annealing process for the temperature, it is necessary to make a good choice of temperature, The annealing temperature can be controlled within the range, and ensure that annealing temperature to meet the production requirements of malleable iron pipe, so that malleable iron pipe in heat treatment process, can meet the actual requirements in temperature, to ensure that the heat treatment temperature standards. Through the control and selection of temperature, it can make the steel pipe parts meet the quality requirements in the production process and ensure the steel pipe parts meet the quality requirements in the production process.
(3) Combustion process controlBased on the understanding of heat treatment of malleable iron pipe, in the heat treatment process, The smaller the temperature difference of annealing, the better. Effective control of annealing temperature difference, not only can improve the heat treatment effect of malleable iron pipe fittings, but also can ensure that the quality requirements can be reached in the heat treating process of malle steel pipes. The heat treatment effect of malleable iron pipe fittings can be improved, the production requirements can be achieved in heat treatment, and the thermal treatment of maldear steel pipe fitting can be satisfied. Therefore, in the heat treatment process of pipe fittings, the control of combustion process should be done to ensure that the burning process can meet the quality requirements, to avoid the quality of the combustion process is not up to standard, causing the whole malleable steel pipes in the treatment process problems. It is important to control the combustion process to ensure that the temperature difference of annealing process is within the controllable range.
2. Annealing process flow
(1) Preparation before ignitionBased on the production characteristics of the annealing process, in the process of annealing process implementation, it is necessary to know the chemical composition of heat treated malleable steel pipe before ignition, need to grasp the change of chemical composition and the content of chemical components, in order to draw annealing process curve, This paper analyzes the specific characteristics and property changes of malleable steel pipe in annealing process, grasps the annealing process characteristics, so that it can improve the effect of annealing process and meet the requirements of anneal process. Therefore, in the implementation of annealing process, it is necessary to do the preparatory work before ignition, according to the characteristics of ignition and annealing process implementation, take targeted measures to meet the annealing process requirements.
(2) Use of pulverized coal machinesIn the annealing process, the pulverized coal machine is an important participating equipment, In order to ensure the normal application of pulverized coal machine and provide powerful equipment support for the whole annealing process, the wood should be placed in the combustion chamber, ignited wood, then the pulverized fuel machine can be started. In order to ensure the stability of flame, it is necessary to control the amount of pulverized coal and the height of the gate. In the annealing reaction, the whole reaction temperature needs to be controlled. The goal of temperature control is achieved by controlling the supply of coal powder. Therefore, effective measures should be taken to improve the efficiency of pulverized coal machine according to the actual needs and specific conditions of annealing reaction.
(3) Control of furnacesIn the annealing process, the furnace control is very important, in order to ensure that annealing process can meet the temperature requirements, It is necessary to control the temperature below 800 degrees in the furnace temperature control, and ensure the temperature rise process and rise range within the allowable range, to avoid the impact of temperature rise too fast or temperature exceeds the standard on the whole annealing process. According to the characteristics of annealing process and actual demand of annealing production, the furnace temperature should be adjusted according to annealing process characteristics and temperature control requirements, so that the whole annealing process can meet the temperature requirements in the implementation process.
(4) PackingIn order to meet the requirements of the annealing process, during the implementation of the anneal process, the correct furnace loading sequence should be adopted in the production process in accordance with the requirements for annealing process and ensure that the entire furnace loading cover can meet the furnace loading requirements. Through the analysis of furnace loading levels, we can master the correct device method, provide effective equipment support for annealing process, meet the implementation requirements of annealing process.
3. CONCLUSIONSIn short, based on the production characteristics of malleable iron pipe fittings, annealing technology is an important process in the production process of malleable iron pipes, and annealing is the key to improve the production result. According to the characteristics and production needs of malleable iron pipe fittings, annealing process should be adopted in the production process of malleable iron pipes. In the annealing process, the details should be controlled according to the process quality requirements to make the annealing treatment of malleable iron pipe to reach the expected goal and improve the annealing effect.
