What defect may appear if aluminum alloy forging is improper?
First, the occurrence of large particles, aluminum alloy deformation degree is too large, can not form texture; The deformation temperature of the superalloy is too low to form mixed deformation structure, which may also lead to the coarse grain. The coarse grain will reduce the plasticity and toughness of the forging and greatly reduce the fatigue performance of the forging.
Second, cold hardening phenomenon, the existence of the structure improves the strength and hardness of the forgings, but reduces the plasticity and toughness of the forgings. Severe cold hardening may cause forging cracks;
3. Cracks will appear. In the forging process, cracks usually occur in the component with the greatest stress and the thinnest thickness.
4. The irregular distribution of flow lines in forgings refers to the disordered distribution of flow lines such as upstream cutting, refluxing and eddy of low-strength forgings;
5. The structural residual of casting occurs mainly in forgings with ingots as billets, and the as-cast structure mainly exists in the areas where forging is difficult to deform;
6. In case of banded structure, the banded structure generated during forging deformation will reduce the transverse plasticity index, especially the impact toughness when two phases coexist. In the working process of forgings or parts, cracks are likely to occur along ferrite belt or at the intersection of two phases;
7. Eccentricity is the displacement of the forging along the parting face relative to the lower part;
8.Axis bending; The geometric position of the forging shaft which is curved and has plane error;
9.Local filling mainly occurs at edges, convex corners and edges, and the size does not meet the requirements of pattern;
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