High-strength-and-ductility heat resistance pressure casting Mg-Y alloy and preparing method thereof
A hot die-casting and toughness-resistant technology is applied in the field of high-strength, toughness, heat-resistant die-casting Mg-Y alloy and its preparation. Small, enhance the effect of room temperature mechanical properties and high temperature performance
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Embodiment 1
[0037] The weight percent of a kind of high-strength and toughness heat-resistant die-casting Mg-Y alloy is: by theoretical ratio, 2.5% Y, 1.0% Zn, 0.5% Al, 0.3% Mn, 0.01% Ti, 0.01% B, the balance is Mg and other unavoidable impurities.
[0038] Its preparation method is:
[0039] (1) According to the above-mentioned Mg-Y alloy composition and stoichiometric ratio, calculate the amount of required raw materials; industrially pure magnesium ingots, industrially pure zinc, industrially pure aluminum ingots, and MgY25 and MgMn10 master alloys are all removed from the oxide layer and pre-dried Heat to 200°C; calculate the amount of raw materials required according to the composition and stoichiometric ratio of the alloy;
[0040] (2) After melting the commercially pure magnesium ingots accounting for 25% of the height of the crucible into a molten pool at 680 ° C, the protective gas argon is introduced, and the remaining magnesium ingots are added;
[0041] (3) After the magnesi...
Embodiment 2
[0046] The weight percent of a high-strength and tough heat-resistant die-casting Mg-Y alloy is: according to the theoretical ratio, 5.0% Y, 4.0% Zn, 1.2% Al, 0.1% Mn, 0.08% Ti, and the balance is Mg and other unavoidable Impurities.
[0047] Its preparation method is:
[0048] (1) According to the above-mentioned Mg-Y alloy composition and stoichiometric ratio, calculate the amount of required raw materials; remove the oxide layer and pre-dry the industrial pure magnesium ingot, industrial pure zinc, industrial pure aluminum ingot and MgY30 and MgMn10 master alloy Heat to 200°C; calculate the amount of raw materials required according to the composition and stoichiometric ratio of the alloy;
[0049] (2) After melting the commercially pure magnesium ingot accounting for 25% of the height of the crucible into a molten pool at 680 ° C, pass through a protective gas containing 0.2% volume fraction of SF 6 and CO 2 The mixed gas, add the remaining magnesium ingot;
[0050] (3...
Embodiment 3
[0055] The weight percentage of a kind of high-strength and toughness heat-resistant die-casting Mg-Y alloy is: by theoretical ratio, 3.0%Y, 2.0%Zn, 1.0%Al, 0.2%Mn, 0.05%Ti, 0.03%B, the balance is Mg and other unavoidable impurities.
[0056] Its preparation method is: (1) according to above-mentioned Mg-Y alloy composition and stoichiometric ratio, calculate the consumption of required raw material; Deoxidize industrial pure magnesium ingot, industrial pure zinc, industrial pure aluminum ingot and MgY30 and MgMn10 master alloy Layer and dry and preheat to 200°C; calculate the amount of raw materials required according to the composition and stoichiometric ratio of the alloy;
[0057] (2) After melting the commercially pure magnesium ingots accounting for 25% of the height of the crucible into a molten pool at 680 ° C, the protective gas argon is introduced, and the remaining magnesium ingots are added;
[0058] (3) After the magnesium ingots are completely melted, raise the ...
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