Forging and rolling integrated manufacturing process of large-diameter ultrahigh-strength high temperature resisting magnesium alloy shell part
A preparation process and ultra-high-strength technology, which is applied in the deformation of magnesium alloys, forging deformation and ring rolling deformation of Mg-Gd-Y-Zr rare earth magnesium alloys, and can solve the problems of difficult preparation of magnesium alloy shell parts and limitation of continuous deformation, etc. problem, to achieve the effect of uniform deformation and small anisotropy
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[0024] Example 1
[0025] First, semi-continuous electromagnetic casting is used to prepare an ingot with a diameter of φ400mm and a length of 2500mm, with a composition of Mg-9.20Gd-2.90Y-0.20Ag-0.05Er-0.39Zr (wt.%). After the casting is completed, it is annealed at 225℃ for 14h. , The ingots with a diameter of φ380mm and a length of 800mm were machined out, and the temperature was kept at 520℃ for 15h for homogenization annealing. The ingot is forged and billeted. Before forging, the ingot is kept at 490°C for 10 hours. The upper and lower anvils are heated to 350°C, and the ingot is forged and deformed at a slow speed of 10mm / s on a vertical hydraulic press. The specific process is: Take the height direction of the cylindrical blank and the two arbitrarily vertical radial directions respectively as the Z, Y and X directions; first, perform 6 passes along the Z, Y and X directions, the pass deformation is 30%, and the cylindrical The blank is pressed into a hexahedron; then, u...
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[0026] Example 2
[0027] First, semi-continuous electromagnetic casting is used to prepare ingots with a diameter of φ450mm and a length of 2500mm with a composition of Mg-8.92Gd-2.23Y-0.28Ag-0.12Er-0.36Zr (wt.%), such as figure 1 As shown, the stress-relieving annealing is kept at 200°C for 16 hours, and an ingot with a diameter of φ420mm and a length of 1075mm is machined out, and the ingot is subjected to homogenization annealing at 490°C for 20 hours. The ingot is forged and billeted. Before forging, the ingot is kept at 520°C for 10 hours, the upper and lower flat anvils are heated to 325°C, and the forging deformation is carried out at a slow speed of 6mm / s on a vertical hydraulic press. The specific process is as follows: The height direction of the blank and the two arbitrarily vertical radial directions are respectively the Z, Y and X directions; firstly, the upsetting is carried out 3 passes along the Z, Y and X directions with a pass deformation of 40%, and the cylindr...
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[0028] Example 3
[0029] First, semi-continuous electromagnetic casting is used to prepare ingots with a diameter of φ450mm and a length of 2500mm, with a composition of Mg-8.71Gd-2.64Y-0.25Ag-0.12Er-0.35Zr(wt.%), and heat-relief annealing at 250℃ for 14h, and mechanical processing An ingot with a diameter of φ420mm and a length of 1075mm is produced and homogenized and annealed at 500℃ for 15h. The ingot is forged and billeted. Before forging, the ingot is kept at 510°C for 12h, the upper and lower anvils are heated to 300°C, and then 8mm / s slow multi-directional forging is performed on a vertical hydraulic press. The specific process is as follows: The two radial directions in the height direction and any vertical direction of the shaped blank are respectively Z, Y and X directions; firstly, the upsetting is carried out 4 passes along the Z, Y and X directions, with a pass deformation of 35%, and the cylindrical blank is pressed Turn into a hexahedron; then use Y or X as the ...
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