High-strength high-toughness ultra-fine grain wrought aluminum alloy and preparation method thereof
A deformed aluminum alloy, high-strength toughness technology, applied in the field of high-strength toughness ultra-fine grain deformed aluminum alloy and its preparation, can solve the problems of unsatisfactory aluminum alloy strength and toughness, and achieve the effect of improving process plasticity and uniform grain distribution
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Embodiment 1
[0020] A method for preparing a high-strength toughness ultra-fine grain deformed aluminum alloy proposed by the present invention comprises the following steps:
[0021] S1. Melting: Melting aluminum ingots, aluminum-silicon alloys, aluminum-iron alloys, aluminum-copper alloys, aluminum-manganese alloys, aluminum-magnesium alloys, chromium ingots, aluminum-zinc alloys and titanium ingots at 765°C to form alloy liquid, Then adjust the composition of the alloy liquid, the composition of the alloy liquid after regulation is: Si0.6%, Fe0.7%, Cu0.25%, Mn0.15%, Mg1.0%, Cr0.25%, Zn0 .25%, Ti0.2%, and the balance is Al; degassing refining is carried out at 800 ° C. During the degassing refining process, the amount of refining agent added is 0.65% of the furnace charge, and the hydrogen content of the alloy liquid after refining is 0.3ml / 100g, heat preservation and standing at 760°C for 20 minutes, and cast to obtain ingots;
Embodiment 2
[0026] A method for preparing a high-strength toughness ultra-fine grain deformed aluminum alloy proposed by the present invention comprises the following steps:
[0027] S1. Melting: Melting aluminum ingots, aluminum-silicon alloys, aluminum-iron alloys, aluminum-copper alloys, aluminum-manganese alloys, aluminum-magnesium alloys, chromium ingots, aluminum-zinc alloys and titanium ingots at 750°C to form alloy liquid, Then the composition of the alloy liquid is regulated, and the composition of the alloy liquid after regulation is: Si0.4%, Fe0.8%, Cu0.15%, Mn0.20%, Mg0.8%, Cr0.35%, Zn0 .15%, Ti0.3%, and the balance is Al; degassing refining is carried out at 780°C. During the degassing refining process, the amount of refining agent added is 0.8% of the furnace charge, and the hydrogen content of the alloy liquid after refining is 0.2ml / 100g, heat preservation and standing at 780°C for 10 minutes, and cast to obtain ingots;
[0028] S2, solid solution heat treatment: heat th...
Embodiment 3
[0032] A method for preparing a high-strength toughness ultra-fine grain deformed aluminum alloy proposed by the present invention comprises the following steps:
[0033] S1. Melting: Melting aluminum ingots, aluminum-silicon alloys, aluminum-iron alloys, aluminum-copper alloys, aluminum-manganese alloys, aluminum-magnesium alloys, chromium ingots, aluminum-zinc alloys and titanium ingots at 780°C to form alloy liquid, Then adjust the composition of the alloy liquid, the composition of the alloy liquid after regulation is: Si0.8%, Fe0.6%, Cu0.35%, Mn0.10%, Mg1.2%, Cr0.15%, Zn0 .35%, Ti0.1%, and the balance is Al; degassing refining is carried out at 820 ° C. During the degassing refining process, the amount of refining agent added is 0.5% of the furnace charge, and the hydrogen content of the alloy liquid after refining is 0.4ml / 100g, heat preservation and standing at 740°C for 30 minutes, and cast to obtain ingots;
[0034] S2, solid solution heat treatment: heat the ingot ...
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