Deformed magnesium alloy with high strength and easy corrosion and preparation method thereof
A deformed magnesium alloy, easy to corrode technology, applied in the field of magnesium alloy materials
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Embodiment 1
[0016] A high-strength and easily corroded deformed magnesium alloy and a preparation method thereof are prepared from the following raw materials by mass percentage:
[0017] 94.5%Mg, 4.0%Zn, 0.7%Ni and 0.8% impurities;
[0018] Specifically, it is realized through the following steps:
[0019] Step 1: Preheating the magnesium ingots, zinc ingots and magnesium-nickel master alloys according to mass percentage respectively to 150°C;
[0020] Step 2: Put the preheated magnesium ingot in the crucible and heat it to a molten state, and inject CO into the crucible during the heating and melting process 2 and SF 6 Mixed protective gas, where CO 2 and SF 6 The volume ratio of the magnesium ingot is 99:1, and the magnesium ingot is completely melted and left to stand for 30 minutes;
[0021] Step 3: When the temperature rises to 720°C, add the preheated zinc ingot and magnesium-nickel master alloy in turn, and keep stirring during the period. After it is completely melted, add t...
Embodiment 2
[0024] A high-strength and easily corroded deformed magnesium alloy and a preparation method thereof are prepared from the following raw materials by mass percentage:
[0025] 93.6%Mg, 5.0%Zn, 1.2%Ni and 0.2% impurities;
[0026] Specifically, it is realized through the following steps:
[0027] Step 1: Preheating magnesium ingots, zinc ingots and magnesium-nickel master alloys according to mass percentages to 180°C respectively;
[0028] Step 2: Put the preheated magnesium ingot in the crucible and heat it to a molten state, and inject CO into the crucible during the heating and melting process 2 and SF 6 Mixed protective gas, where CO 2 and SF 6 The volume ratio of the magnesium ingot is 99:1, and the magnesium ingot is completely melted and allowed to stand for 45 minutes;
[0029] Step 3: When the temperature rises to 740°C, add the preheated zinc ingot and magnesium-nickel master alloy in turn, and keep stirring during the period. After it is completely melted, add t...
Embodiment 3
[0032] Table 1 shows the mechanical properties and corrosion rates of the high-strength and easily corrodible wrought magnesium alloys prepared in Example 1 and Example 2. In the measurement of corrosion rate, a sample block of 50×50×25 mm was cut and immersed in a 5% NaCl solution for corrosion test. The corrosion time was 1 day, and the water temperature and room temperature were both at room temperature.
[0033]
[0034] Table 1
[0035] To sum up, the tensile strength of the wrought magnesium alloy produced by this process can reach 235-250MPa at room temperature, the yield strength can reach 150-170MPa, the elongation can reach 13-15%, and the corrosion rate in 5% NaCl solution at room temperature can reach 30-45mg / cm 2 / d.
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Abstract
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