Heatproof aluminum alloy and preparation method and application thereof
An aluminum alloy and heat-resistant technology, which is applied in the field of metal material manufacturing, can solve the problems that aluminum alloys are difficult to guarantee strength and ductility, and heat resistance is not durable, so as to achieve good and durable heat resistance, overcome heat resistance, and apply wide effect
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Embodiment 1
[0024] A heat-resistant aluminum alloy, comprising the following elements, the mass fraction percent of which is 0.1wt.% iron, 0.2wt.% manganese, 2.1wt.% copper, 1.3wt.% nickel, 1.2wt.% boron, 1.2wt. % magnesium, 5.2 wt.% carbon, 11.3 wt.% silicon, 9.2 wt.% chromium, the balance being aluminum.
[0025] A method for preparing a heat-resistant aluminum alloy, comprising the following steps:
[0026] (1) Put the powders of the above elements into a powder mixer and mix them, then place them at 260°C for 9 hours, then raise the temperature to 450°C for 20 hours;
[0027] (2) hot-rolling the ingot after the heat treatment in step (1), the temperature is 420° C., the holding time is 2.5 hours, the pass reduction is 12%, and the total deformation of hot rolling is 84%;
[0028] (3) Carry out intermediate annealing at 280 DEG C of gained hot-rolled sheet, annealing time is 1.5 hours, then carry out cold rolling, pass reduction is 12%, and cold rolling total deformation is 30%;
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Embodiment 2
[0031] A heat-resistant aluminum alloy, comprising the following elements, the mass fraction percent of which is 0.4wt.% iron, 0.8wt.% manganese, 2.5wt.% copper, 1.9wt.% nickel, 2.1wt.% boron, 1.9wt. % magnesium, 6.1 wt.% carbon, 12.9 wt.% silicon, 10.3 wt.% chromium, the balance being aluminum.
[0032] A method for preparing a heat-resistant aluminum alloy, comprising the following steps:
[0033] (1) Put the powders of the above elements into a powder mixer and mix them, then place them at 275°C for 10 hours, then raise the temperature to 460°C for 22 hours;
[0034] (2) hot-rolling the ingot after the heat treatment in step (1), the temperature is 430°C, the holding time is 3 hours, the pass reduction is 15%, and the total deformation of hot rolling is 86%;
[0035] (3) Carry out intermediate annealing at 300 DEG C with the gained hot-rolled plate, the annealing time is 2 hours, then carry out cold rolling, the pass reduction is 16%, and the total deformation of cold roll...
Embodiment 3
[0038] A heat-resistant aluminum alloy, comprising the following elements, the mass fraction percent of which is 1.2wt.% iron, 1.5wt.% manganese, 3.2wt.% copper, 2.6wt.% nickel, 3.1wt.% boron, 3.4wt. % magnesium, 7.5 wt.% carbon, 14.8 wt.% silicon, 11.4 wt.% chromium, the balance being aluminum.
[0039] A method for preparing a heat-resistant aluminum alloy, comprising the following steps:
[0040] (1) Put the powders of the above elements into a powder mixer and mix them, then place them at 285°C for 11 hours, then raise the temperature to 470°C for 24 hours;
[0041] (2) hot rolling the ingot after the heat treatment in step (1), the temperature is 445° C., the holding time is 3.5 hours, the pass reduction is 22%, and the total deformation of hot rolling is 88%;
[0042] (3) Carry out intermediate annealing at 310 DEG C of gained hot-rolled plate, annealing time is 2.5 hours, then carry out cold rolling, pass reduction is 22%, and cold rolling total deformation is 40%;
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