The preparation of aluminum alloy forgings before forging includes the selection of raw materials, calculation, blanking, heating, deformation, design of equipment and molds. Before forging, the lubrication method and lubricant should also be selected.
Forging materials have a wide range of surfaces, including various brands of steel, superalloys, aluminum, magnesium, titanium, copper and other non-ferrous metals; they are processed into bars and profiles of different sizes, and ingots of various specifications; in addition to a large number of suitable for Chinese resources. In addition to domestic materials, there are also foreign materials. Most forging materials have been incorporated into national standards, and many of them are new materials developed, tried and promoted. As we all know, the quality of products is often closely related to the quality of raw materials, so forging personnel must have the necessary material knowledge and be good at selecting the most suitable material according to the process requirements.
Calculating materials and feeds is one of the important links to improve material utilization and achieve blank refinement. Too much material not only creates waste, but also increases mold wear and energy consumption. If there is no leftover, it will increase the difficulty of process adjustment and increase the waste rate. In addition, the quality of the feed end face also affects the quality of the process and forgings.
The purpose of heating is to reduce the forging deformation force and improve the metal plasticity. But heating also brings a series of problems such as oxidation, decarburization, overheating and overheating. Accurate control of initial forging and terminal forging temperatures has a great impact on product organization and properties. The heating cost of the flame furnace is low and the applicability is strong, but the heating time is long, it is easy to oxidize and decarbonize, and the working conditions need to be continuously improved. Electric induction heating has the advantages of fast heating and less oxidation, but it has poor adaptability to changes in product shape, size and material.