Advantages of aluminum alloy forging products: aluminum alloy has been widely used in various industrial sectors because of its small specific gravity, high specific strength and high specific stiffness, and aluminum alloy forgings have become an indispensable material for mechanical parts in various industrial sectors. All kinds of forgings that can be forged with low carbon steel can be forged with aluminum alloy. Tongli Aluminum Co., Ltd. said that aluminum alloy can be forged on various forging equipment such as forging hammer, mechanical press, hydraulic press, upsetting machine and reaming machine, and can be forged freely, die forging, upsetting, roll forging and reaming.

Generally speaking, aluminum forgings with small size, simple shape and lax deviation requirements can be easily forged on a forging hammer. However, for aluminum forgings with large specifications and severe deformation, it is advisable to use a water (liquid) press for forging.

For large and complex aluminum forgings with integral structure, it is necessary to use large die forging hydraulic press to produce them. Especially in recent ten years, with the progress of science and technology and the development of national economy, higher and higher requirements are put forward for materials, which forces aluminum alloy forgings to develop in the direction of large-scale, high-strength, high-toughness, complex and precise, and greatly promotes the development of large and medium-sized hydraulic presses.

Lanxi Tongli Aluminum Co., Ltd., established in 2001, is a professional manufacturer of forged aluminum alloy sprocket crank and bicycle forged aluminum alloy accessories, and has many years of experience in forging aluminum alloy products. The whole process from product design, forging, machining to surface treatment and performance testing can be completed in our company, which greatly saves production costs.

Technological characteristics of aluminum alloy forging

When forging aluminum alloy, due to the large external friction coefficient and poor fluidity, if the deformation speed is too fast, it is easy to cause defects such as peeling, folding and uneven crystal structure of the forging, and it is also easy to cause cracking of the forging for low plasticity and high strength aluminum alloy.

Choosing the appropriate deformation degree can ensure that the aluminum alloy does not crack during forging, and the deformation is uniform and the microstructure and properties are excellent. In order to ensure that the aluminum alloy does not crack during forging, the maximum allowable deformation for each blow or extrusion should be determined according to the plasticity of the alloy on the selected forging equipment.

In addition to the critical deformation, rough die surface, severe uneven deformation, low final forging temperature, high quenching temperature and long time are all easy to cause coarse grains in aluminum alloy forging. In order to avoid coarse grains, the deformation degree at the final forging temperature should be properly controlled.

Design and technological operation characteristics of forgings and forging dies;

When selecting the parting surface, besides considering the same factors as selecting steel forgings, the deformation uniformity should be especially considered. If the parting surface is unreasonable, the streamline of forgings will be disordered, the end of streamline will be exposed after burrs, and aluminum alloy forgings will easily have defects such as cross-flow and rib-piercing cracks on the parting surface, thus reducing their fatigue strength and stress corrosion resistance.

During aluminum alloy forging, the surface oxidation, pollution and metallographic structure change are not obvious, so the machining allowance should be less than that of steel and superalloy.

Designing fillet radius is particularly important for aluminum alloy forgings. Because the small fillet radius not only makes it difficult for metal to flow, fiber breaks, but also causes forgings to fold and crack, thus reducing the service life of forging dies, so the fillet radius should be increased as much as possible, but conditions may permit. The fillet radius of aluminum forging products is generally larger than that of steel forging products. In order to prevent cracks on the parting line of aluminum alloy forgings after trimming, Transit Aluminum Xiaobian suggested that the bridge deck height and fillet radius of its forging die are 30% larger than that of steel forgings.

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