Preparation method of ultrahigh-strength blocky Mg-Gd-Y-Zr nano magnesium alloy
A technology of nano-magnesium and magnesium alloys, which is applied in the field of bulk nano-material preparation, can solve problems such as lack of methods, and achieve the effects of high strain rate, increased total deformation, and high hydrostatic stress.
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Embodiment 1
[0018] a. The mass percentage composition of the magnesium alloy used is Mg-8Gd-3Y-0.4Zr, the magnesium alloy ingot is prepared by a semi-continuous casting method, and the homogenization heat treatment is carried out;
[0019] b. Extruding and deforming the homogenized alloy billet;
[0020] c. The extruded bar is subjected to rotary forging deformation at 25°C, the deformation of each pass is controlled at 15%, 15%, 10%, the total deformation is 35%, the feed rate is controlled at 2mm / min, and the deformation is changed after each pass In the feeding direction, the average grain size of the obtained nano-magnesium alloy is 30nm, and the finished product size is 3.5mm in diameter and 1500mm in length;
[0021] d. The swaged bar is subjected to aging heat treatment.
[0022] According to GB / T228-2002, the mechanical properties of the obtained nano-magnesium alloy were tested, and the results are shown in Table 1.
Embodiment 2
[0024] a. The mass percentage composition of the magnesium alloy used is Mg-8Gd-3Y-0.4Zr, the magnesium alloy ingot is prepared by a semi-continuous casting method, and the homogenization heat treatment is carried out;
[0025] b. Extruding and deforming the homogenized alloy billet;
[0026] c. The extruded bar is subjected to swaging deformation at 150°C, the deformation of each pass is controlled at 10%, 15%, 10%, 10%, the total deformation is 38%, and the feeding speed is controlled at 2mm / min. After the deformation, the feeding direction is changed, and the average grain size of the obtained nano-magnesium alloy is 50nm, and the finished product size is 5mm in diameter and 2000mm in length;
[0027] d. The swaged bar is subjected to aging heat treatment.
[0028] According to GB / T228-2002, the mechanical properties of the obtained nano-magnesium alloy were tested, and the results are shown in Table 1.
Embodiment 3
[0030] a. The mass percentage composition of the magnesium alloy used is Mg-8Gd-3Y-0.4Zr, the magnesium alloy ingot is prepared by a semi-continuous casting method, and the homogenization heat treatment is carried out;
[0031] b. Extruding and deforming the homogenized alloy billet;
[0032] c. The extruded bar is subjected to rotary forging deformation at 200°C, and the deformation amount of each pass is controlled to be 15%, 15%, 15%, and the total deformation amount is 39%, and the feeding speed is controlled to be 4mm / min. In the feeding direction, the average grain size of the obtained nano-magnesium alloy is 70nm, and the finished product size is 3mm in diameter and 1000mm in length;
[0033] d. The swaged bar is subjected to aging heat treatment.
[0034] According to GB / T228-2002, the mechanical properties of the obtained nano-magnesium alloy were tested, and the results are shown in Table 1.
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