Method for preparing ultrahigh strength high toughness magnesium alloy
A tough magnesium alloy, ultra-high-strength technology, applied in the field of ultra-high-strength and high-toughness magnesium alloy preparation, can solve the problems that limit the large-scale application of magnesium alloys, and achieve the effect of improving performance and preventing cracking
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Embodiment 1
[0019] First, the magnesium alloy (alloy composition (w%): Gd: 8%, Y: 4%, Zr: 0.5%, the rest is Mg and impurity elements that cannot be removed) is subjected to strong thermal deformation of the semi-continuous casting ingot, and the deformation temperature is 420°C, the deformation force is 8×10 3 KN, the deformation speed is 18mm / s, and the total deformation is 99%; then the magnesium alloy after strong thermal deformation is subjected to rapid temperature deformation, the deformation temperature is 150°C, the deformation force is 2KN, the deformation speed is 21mm / s, the total The amount of deformation is 39%; after rapid thermal deformation, the alloy is subjected to aging heat treatment, and the aging process is: 210°C / 28h. According to GB / T228-2002, the mechanical properties of magnesium alloys in warm-worked state and aging state were tested, and the results are shown in Table 1.
Embodiment 2
[0021] First, the magnesium alloy (alloy composition (w%): Gd: 10%, Y: 6%, Zr: 0.4%, the rest is Mg and impurity elements that cannot be removed) is subjected to strong thermal deformation for semi-continuous casting. at 400°C, the deformation force is 7×10 3 KN, the deformation speed is 16mm / s, and the total deformation is 98%; then the magnesium alloy after strong thermal deformation is subjected to rapid temperature deformation, the deformation temperature is 140°C, the deformation force is 3KN, the deformation speed is 19mm / s, the total The amount of deformation is 33%; after the rapid thermal deformation, the alloy is subjected to aging heat treatment and the aging process is: 220°C / 24h. According to GB / T228-2002, the mechanical properties of magnesium alloys in warm-worked state and aging state were tested, and the results are shown in Table 1.
Embodiment 3
[0023] First, the magnesium alloy (alloy composition (w%): 12%, Y: 3%, Zr: 0.7%, the rest is Mg and impurity elements that cannot be removed) is subjected to strong thermal deformation for semi-continuous casting, and the deformation temperature is 380 ℃, the deformation force is 6×10 3 KN, the deformation speed is 14mm / s, and the total deformation is 95%; and then the magnesium alloy after strong thermal deformation is subjected to rapid temperature deformation, the deformation temperature is 130°C, the deformation force is 3KN, the deformation speed is 18mm / s, the total The amount of deformation is 25%; after rapid thermal deformation, the alloy is subjected to aging heat treatment and the aging process is: 230°C / 23h. According to GB / T228-2002, the mechanical properties of magnesium alloys in warm-worked state and aging state were tested, and the results are shown in Table 1.
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