Aluminum alloy forging is mainly used for forging aluminum alloy. Die casting aluminum alloy belongs to casting aluminum alloy, but die casting aluminum alloy is mainly used.

Aluminum alloy forging includes A1-Si-Mg-Cu alloy and A1-Cu-Ni-Fe alloy. Commonly used forged aluminum alloys include LD2.LD5.LDL0, etc. They contain a variety of alloying elements, but the content is small. They have good thermoplasticity, so they have good forging performance and good mechanical properties. This alloy is mainly used for bearing die forgings and some forgings with complex shapes.

Cast aluminum alloys can be divided into four categories: A1-Si system, A1-Cu system, Al-Mg system and Al-Zn system. For casting aluminum alloy, besides the necessary mechanical properties and corrosion resistance, it should also have good casting performance. Among the cast aluminum alloys, A1-Si alloy, also known as aluminosilicate, has good castability and mechanical properties.

What is precision forging technology for forging stainless steel forgings?

Reasonable use of different forging technologies in the forging process can improve the quality and production efficiency of stainless steel forging. Fine forging is a forming technology, which can meet the requirements of dimensional accuracy of parts with little or no machining.

There are two main ways to realize precision forging: precision forging blank, that is, directly forging blank that meets the requirements of precision machining. Precision forging of stainless steel forgings, the whole part or part is directly divided by precision forging process to reduce the machining amount.

At present, there are many precision forging processes used in production. According to the different components, it can be divided into warm forging, hot precision forging, cold precision forging and qualified forging.

Temperature forging is a fine forging technology, which can heat the metal to a temperature below the appropriate recrystallization temperature for forging. It also has the advantages of hot forging and cold forging, which avoids their defects, effectively reduces the load of equipment and dies, improves the plasticity and fluidity of metals, and does not need forging annealing.

Hot precision forging refers to the forging process carried out above recrystallization temperature. Due to the high deformation temperature, the material has low deformation resistance and good plasticity during forging, so it is easy to form parts with complex geometry.

Cold precision forging process is a precision forging process that is forged at room temperature. Due to forming at room temperature, the size error caused by thermal expansion and cold contraction is avoided, and the shape and size of cold precision forgings are easy to control. At the same time, the surface of stainless steel forgings does not produce oxidation and burn, and the surface quality is high. Therefore, the forging precision of hot precision forging and warm precision forging is lower than that of cold precision forging.

Combined with cold forging, warm forging and hot forging, the composite fine forging process can give full play to the advantages of cold forging and hot forging and avoid the disadvantages of cold forging and warm forging. At the same time, the mechanical properties, dimensional accuracy and surface quality of parts produced by composite fine forging process are improved compared with those produced by single forging process. At present, the commonly used composite fine forging processes mainly include temperature forging-cold forging, hot forging-cold forging, temperature extrusion-cold pendulum, hot fine forging-cold extrusion, hot fine forging-cold pendulum and so on.

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