New process for purifying magnesium alloy
A magnesium alloy and new process technology, applied in the field of purification process of impurity elements, can solve problems such as adverse effects on the overall performance of molten magnesium alloy materials, and achieve the effects of good overall purification effect, reduction of impurity content and low production cost
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Embodiment 1
[0021] Mg-Zn-Zr magnesium alloy was casted by conventional gravity casting method.
[0022] 1) The raw materials are magnesium ingots, zinc ingots and Mg-28%Zr master alloy, and the design composition of alloy elements is 5.8% Zn and 0.65% Zr;
[0023] 2) Melt in a graphite crucible, heat up to melt pure magnesium, and when the temperature is 740-750°C, add zinc ingots and Mg-Zr intermediate alloys, and stir the alloy liquid after alloying to make the ingredients uniform;
[0024] 3) The alloy liquid is refined at a temperature of 750-760°C, the refining time is about 5 minutes, and then the slag is removed;
[0025] 4) Analyze the composition of the alloy liquid before the furnace, and continue to the next step after the composition of the main alloy elements is qualified;
[0026] 5) Under the temperature condition of 730-740°C, heat-preserve the melt for 30 minutes;
[0027] 6) After heat preservation and static treatment, disconnect the power supply of the melting furnac...
Embodiment 2
[0031] Mg-Zn-Zr magnesium alloy was prepared by semi-continuous casting technique.
[0032] 1) The raw materials are magnesium ingots, zinc ingots and Mg-28%Zr master alloy, and the design composition of alloy elements is 5.5% Zn and 0.6% Zr;
[0033] 2) Melt in a steel crucible, heat up to melt pure magnesium, when the temperature is 760-770°C, add zinc ingots and Mg-Zr intermediate alloys, and stir the alloy liquid after alloying to make the ingredients uniform;
[0034] 3) The alloy liquid is refined at a temperature of 750-760°C, the refining time is about 3-5min, and then the slag is removed;
[0035] 4) Analyze the composition of the alloy liquid before the furnace, and continue to the next step after the composition of the main alloy elements is qualified;
[0036] 5) Under the temperature condition of 750-760 ℃, heat preservation and standing treatment of the melt for 30 minutes;
[0037] 6) After heat preservation and static treatment, disconnect the power supply of...
Embodiment 3
[0041] Mg-Zn-Zr magnesium alloy was prepared by semi-continuous casting technique.
[0042] The only difference from Example 2 lies in the resting time of the melt in step 5) of the preparation process, and the holding time of this alloy melt is 45 minutes.
[0043] The chemical composition analysis results of the obtained magnesium alloy ingots are shown in Table 1. It can be seen that the purity of this alloy is high, the amount of common impurity elements is very small, the impurity content of Fe is 0.0013%, and the total content of impurity elements in the alloy is less than 0.00425%, which is lower than that of Example 2. Appropriately extending the heat preservation and standing time is more conducive to the settlement of impurity elements , so that the purification effect is more obvious.
[0044]
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