Gadolinium-containing die-casting thermostable high-zinc magnesium alloy and method for making same
A magnesium alloy, heat-resistant technology, applied in the field of gadolinium-containing die-casting heat-resistant high-zinc-magnesium alloy and its preparation, to achieve the effects of preventing movement, improving creep performance, and low cost
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Embodiment 1
[0016] Alloy composition (percentage by weight): 8% Zn, 5% Al, 0.4% Gd, the total amount of impurity elements is less than 0.02%, and the rest is Mg.
[0017] The specific steps of the preparation process of the heat-resistant high-zinc-magnesium alloy containing gadolinium are as follows: (1) configure the alloy according to the above-mentioned components, add commercially pure magnesium into the resistance crucible furnace, and simultaneously use N 2 and SF 6 Mixed gas protection; (2) After the magnesium is completely melted, add industrial pure aluminum and industrial pure zinc at 680°C; (3) Continue to raise the temperature, add Mg-25%Gd master alloy at 730°C, and after all the alloying elements are melted, Stir the alloy liquid with a tool for 2 minutes to make the ingredients uniform; (4) lower the temperature, refine at 755 ° C, stir for 3 minutes, and then stand for 30 minutes; (5) then lower the temperature to 680 ° C, skim off the surface scum Perform die casting. ...
Embodiment 2
[0020] Alloy composition (percentage by weight): 6% Zn, 3% Al, 1.0% Gd, impurity elements less than 0.02%, and the rest being Mg.
[0021] The specific steps of the preparation process of the heat-resistant high-zinc-magnesium alloy containing gadolinium are as follows: (1) configure the alloy according to the above-mentioned components, add commercially pure magnesium into the resistance crucible furnace, and simultaneously use N 2 and SF 6 Mixed gas protection; (2) After the magnesium is completely melted, add industrial pure aluminum and industrial pure zinc at 680°C; (3) Continue to raise the temperature, and add Mg-25%Gd master alloy when the temperature reaches 735°C, and the master alloy is completely melted Finally, use a tool to stir the alloy liquid for 2 minutes to make the ingredients uniform; (4) lower the temperature, refine at 750 ° C, stir for 2 minutes, and then stand for 30 minutes; (5) then lower the temperature to 690 ° C and skim Surface dross for die cas...
Embodiment 3
[0024] Alloy composition (percentage by weight): 9.8% Zn, 6.8% Al, 0.5% Gd, impurity elements less than 0.02%, and the rest being Mg.
[0025] The specific steps of the preparation process of the heat-resistant high-zinc-magnesium alloy containing gadolinium are as follows: (1) configure the alloy according to the above-mentioned components, add commercially pure magnesium into the resistance crucible furnace, and simultaneously use N 2 and SF 6 Mixed gas protection; (2) After the pure magnesium is completely melted, add industrial pure aluminum and industrial pure zinc at 680°C; (3) Continue to raise the temperature, add Mg-25%Gd master alloy at 740°C, and wait until all the alloying elements are melted , use a tool to stir the alloy liquid for 2 minutes to make the ingredients uniform; (4) lower the temperature to 745°C, then refine, stir for 4 minutes, and then stand for 30 minutes; (5) then lower the temperature to 700°C and skim off the surface Dross for die casting.
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