Multielement heat and corrosion resisting magnesium alloy and preparation method
A magnesium alloy, heat-resistant technology, applied in the field of multi-component heat-resistant casting magnesium alloy and its preparation, can solve the problems of high Sn content, achieve the effects of improving corrosion resistance, heat resistance and corrosion resistance, and increasing strength
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[0083] The invention also discloses a method for preparing a multi-component heat-resistant and corrosion-resistant magnesium alloy, which includes the following steps:
[0084] 1) Raw material preparation
[0085] According to the chemical composition and mass percentage of the designed alloy, pure magnesium, pure aluminum, pure zinc, pure tin, Mg-Nd master alloy, Mg-Sm master alloy, and Mg-Mn master alloy are weighed as raw materials; among them, the purity of the magnesium ingot is ≥ 99.99%, the purity of aluminum ingots is ≥99.99%, the purity of zinc ingots is ≥99.99%, the purity of tin ingots is ≥99.99%, and the impurity content of Mg-Nd, Mg-Sm and Mg-Mn master alloys is ≤0.1%.
[0086] Put the raw materials of the above components into an oven at 90-135°C to preheat for 0.5-1 hour;
[0088] First, put the pure magnesium ingot into the SF with a volume ratio of 1:90~110 6 and CO 2 In the mixed protective gas, heat in a melting furnace with a ...
Embodiment 25
[0094] According to the mass fraction of 7.3% Al, 3.0% Sn, 0.8% Zn, 1.2% RE (0.8% Nd and 0.4% Sm) and 0.2% Mn, the rest is Mg and the unavoidable total amount of impurities ≤ 0.2% for batching , the ingredients were baked in an oven at 120°C for 50 minutes, and then the pure magnesium ingots were put into a resistance crucible furnace, in SF 6 :CO 2 Under the protection of a volume ratio of 1:100, heat until completely melted, then raise the temperature to 680°C, add pure aluminum, pure zinc, pure tin, stir the alloy liquid after dissolution, add Mg-Nd, Mg-Sm and Mg at 700°C -Mn intermediate alloy, after the alloy is completely melted, stir the alloy liquid fully, cool down to 680°C for argon refining for 2 minutes, remove the surface scum, and the argon flow rate is 8 ml / min, then rise to 745°C and stand for 20 minutes Casting to a cast iron mold at 200°C; then put the casting into an electric furnace with a dry high-purity nitrogen atmosphere, keep it at 420°C for 20 hours,...
Embodiment 26
[0097] According to the mass fraction of 7.3% Al, 3.0% Sn, 0.8% Zn, 1.2% RE (0.8% Nd and 0.4% Sm) and 0.2% Mn, the rest is Mg and the unavoidable total amount of impurities ≤ 0.2% for batching , the ingredients were baked in an oven at 120°C for 50 minutes, and then the pure magnesium ingots were put into a resistance crucible furnace, in SF 6 :CO 2 Under the protection of a volume ratio of 1:100, heat to complete melting and then raise the temperature to 680°C, add pure aluminum, pure zinc, pure tin, stir the alloy liquid after dissolution, add Mg-Nd, Mg-Sm and Mg at 710°C -Mn intermediate alloy, after the alloy is completely melted, stir the alloy liquid fully, cool down to 690°C for argon refining for 3 minutes, remove the surface scum, and the argon flow rate is 15 ml / min, then rise to 745°C and stand for 20 minutes Casting to 200°C cast iron mold; then put the casting into an electric furnace with a dry high-purity nitrogen atmosphere, keep it at 420°C for 20 hours, then...
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Description
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Application Information
- IPC
- C22C23/02; C22C1/03
- CPC
- C22C1/03; C22C23/02
- Inventors
- 刘国军; 王慧远