In the production system of the modern pipe fittings industry, large stainless steel flanges have excellent principles, large production capacity, simple forging process, and small floor area, longer life, simple operation, and have become a new type of flange production The primary selection equipment of raw materials in the line has been widely used in the market.
Flanges are generally used in key parts of large pipelines. Because of the harsh operating environment and complex forces, the quality requirements for large forgings are very high in production. The flange is directly forged and formed by steel ingots. When large forgings are produced, even if the better metallurgical skills are used, the internal defects of the steel ingots such as microcracks, porosity, shrinkage, and segregation cannot be avoided, which severely affects the quality of forgings. These shortcomings, to increase the quality of forgings, it is necessary to improve the forging and select reasonable forging process parameters.
Flange forging not only has to achieve the required part shape and size, but it is also important to break the as-cast group to refine the grain, uniform structure, forging shrinkage, porosity and shrinkage, and increase the internal quality η of the forging. The larger the size of the steel ingot, the more severe the shortcomings in the steel ingot, the more difficult it is to improve the shortcomings, and then increase the difficulty of forging. In the process of flange forging, upsetting and drawing length are fundamental processes, and they are also indispensable processes. For forgings with specific shapes, tire die forging is also commonly used. Therefore, it is necessary to discuss the upsetting, drawing and forging process technology.
The flange accuracy obtained by various flange methods is different, the initial investment and the production rate are not consistent, and the final economic benefits are also different. Therefore, in order to be more, faster, better, and less expensive, all aspects should be considered. A preliminary cost budget should be made for the selected flange method to determine the flange method that has high economic benefits and can guarantee the flange requirements.
Although the development of my country’s flange industry is in a relatively difficult period, from a long-term perspective, my country’s fine flange industry still has a certain degree of hope. The market demand has gradually begun to pick up, and my country's flange industry has strong strength in its development, and trusting my country's flange industry will surely achieve gratifying results.
Experts indicate that to fundamentally improve the level of flange skills, the following four points must be achieved: first, develop imitation skills, improve the accuracy of prediction, strengthen process control, and improve yield. The problem of regularity is not well mastered, and then it affects the yield in mass production. Second, the integration of production, education and research. In addition to the enhancement of the awareness of innovation and the improvement of research and development capabilities, the independent innovation of enterprises also needs to pay attention to and strengthen the integration of "production, learning, and research" with fine flange enterprises as the main body. Third, attach importance to data development. Data is the foundation of industry, and there was still a lot of work to do at that time. In the field of aerospace, the research and melting skills of some new materials such as alloy materials, especially high-temperature alloys, still need to be improved, and there is still a big gap with foreign countries. Fourth, attach importance to the improvement of equipment skills. The technology is still a problem of equipment. Many key equipment, such as some directional coagulation equipment, still rely on imports, so the development of fine flange equipment is still the focus.
Flanges are generally used in key parts of large pipelines. Because of the harsh operating environment and complex forces, the quality requirements for large forgings are very high in production. The flange is directly forged and formed by steel ingots. When large forgings are produced, even if the better metallurgical skills are used, the internal defects of the steel ingots such as microcracks, porosity, shrinkage, and segregation cannot be avoided, which severely affects the quality of forgings. These shortcomings, to increase the quality of forgings, it is necessary to improve the forging and select reasonable forging process parameters.
Flange forging not only has to achieve the required part shape and size, but it is also important to break the as-cast group to refine the grain, uniform structure, forging shrinkage, porosity and shrinkage, and increase the internal quality η of the forging. The larger the size of the steel ingot, the more severe the shortcomings in the steel ingot, the more difficult it is to improve the shortcomings, and then increase the difficulty of forging. In the process of flange forging, upsetting and drawing length are fundamental processes, and they are also indispensable processes. For forgings with specific shapes, tire die forging is also commonly used. Therefore, it is necessary to discuss the upsetting, drawing and forging process technology.
The flange accuracy obtained by various flange methods is different, the initial investment and the production rate are not consistent, and the final economic benefits are also different. Therefore, in order to be more, faster, better, and less expensive, all aspects should be considered. A preliminary cost budget should be made for the selected flange method to determine the flange method that has high economic benefits and can guarantee the flange requirements.
Although the development of my country’s flange industry is in a relatively difficult period, from a long-term perspective, my country’s fine flange industry still has a certain degree of hope. The market demand has gradually begun to pick up, and my country's flange industry has strong strength in its development, and trusting my country's flange industry will surely achieve gratifying results.
Experts indicate that to fundamentally improve the level of flange skills, the following four points must be achieved: first, develop imitation skills, improve the accuracy of prediction, strengthen process control, and improve yield. The problem of regularity is not well mastered, and then it affects the yield in mass production. Second, the integration of production, education and research. In addition to the enhancement of the awareness of innovation and the improvement of research and development capabilities, the independent innovation of enterprises also needs to pay attention to and strengthen the integration of "production, learning, and research" with fine flange enterprises as the main body. Third, attach importance to data development. Data is the foundation of industry, and there was still a lot of work to do at that time. In the field of aerospace, the research and melting skills of some new materials such as alloy materials, especially high-temperature alloys, still need to be improved, and there is still a big gap with foreign countries. Fourth, attach importance to the improvement of equipment skills. The technology is still a problem of equipment. Many key equipment, such as some directional coagulation equipment, still rely on imports, so the development of fine flange equipment is still the focus.
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