A heat-resistant forged aluminum alloy

Abstract

A heat-resistant wrought aluminum alloy is characterized by containing the following metal elements: silicon 0.05-0.10%, iron 0.8-1.5%, copper 1.5-3.0%, manganese 0.2-0.5%, magnesium 1-2%, nickel 1-2% %, zinc 0.1-0.5%, titanium 0.05-0.15%, molybdenum 0.01-1% and the balance aluminum. The alloy obtained by the invention is a heat-resistant wrought aluminum alloy with less silicon content and high thermal strength; after adding titanium element, the structure is fine; after adding silicon, molybdenum, nickel, copper, iron and other elements, it can form thermal stability with aluminum The better excess phases Al2CuMg, Al6Cu3Ni, Al2FeSi, Al3Ti, Al2Cu4Mg5Si4, etc., improve the thermal strength of the aluminum alloy, can be strengthened by heat treatment, and have high plasticity in the hot state; do not contain manganese, chromium, so there is no extrusion effect, resistance Good welding, spot welding and seam welding performance, good corrosion resistance and machinability. It can be used to manufacture pistons of internal combustion engines and complex forgings that work at high temperatures, such as compressor impellers, blower impellers, etc.

Description

technical field

[0001] The invention relates to a heat-resistant forged aluminum alloy. Background technique

[0002] Heat-resistant aluminum alloys are alloys that can be used at higher temperatures without softening. Among them, Al-Cu-Mg aluminum alloys are widely used as structural materials in the aerospace field due to their high strength and good heat resistance. , but the alloy mainly works in an environment below 100°C, and above 100°C, the coarsening of the strengthening phase will significantly reduce its mechanical properties.

[0003] According to the processing method, aluminum alloys can be divided into denatured aluminum alloys and cast aluminum alloys. Deformed aluminum alloys are further divided into non-heat-treatable aluminum alloys and heat-treatable aluminum alloys. The latter can be improved by heat treatment methods such as quenching and aging. Mechanical properties , can be divided into duralumin, wrought aluminum (LD + digital designation), supe...

Examples

Embodiment 1

[0011] A heat-resistant forged aluminum alloy, characterized by containing the following metal elements: 0.05% silicon, 0.8% iron, 1.5% copper, 0.2% manganese, 1% magnesium, 1% nickel, 0.1% zinc, 0.05% titanium, and 0.01% molybdenum % and the balance of aluminum.

[0012] The preparation method of heat-resistant wrought aluminum alloy is to add aluminum ingot during smelting, raise the temperature to 700°C, after the aluminum ingot is completely melted, add other components in turn; after stirring evenly, after holding for 50 minutes, refining for 30 minutes, and holding for 30 minutes ;Casting after removing slag and ash, the casting temperature is controlled at 500°C, and the casting machine speed is controlled at 80mm / min; rolling is carried out at 490°C, and the final rolling temperature is 300°C; the alloy is annealed at 380°C for 10 hours . The aluminum alloy obtained by the present invention has a tensile strength of 570MPa, an elongation of 5%, and a Brinell strength ...

Embodiment 2

[0014] A heat-resistant forged aluminum alloy, characterized by containing the following metal elements: 0.10% silicon, 1.5% iron, 3.0% copper, 0.5% manganese, 2% magnesium, 2% nickel, 0.5% zinc, 0.15% titanium, molybdenum 1 % and the balance of aluminum.

[0015] The preparation method of heat-resistant wrought aluminum alloy is to add aluminum ingots during smelting, raise the temperature to 780°C, after the aluminum ingots are completely melted, add other components in turn; after stirring evenly, keep warm for 30 minutes, refine for 20 minutes, and keep warm for 40 minutes ;Casting after removing slag and ash, the casting temperature is controlled at 520°C, and the casting machine speed is controlled at 90mm / min; rolling is carried out at 590°C, and the final rolling temperature is 380°C; the alloy is annealed at 400°C for 20h . The tensile strength of the aluminum alloy obtained by the present invention is 498MPa, the elongation is 3.7%, and the Brinell strength is 150HB...

Embodiment 3

[0017] A heat-resistant forged aluminum alloy, characterized by containing the following metal elements: 0.08% silicon, 1.0% iron, 2.0% copper, 0.3% manganese, 1.5% magnesium, 1.5% nickel, 0.3% zinc, 0.1% titanium, 0.5% molybdenum % and the balance of aluminum.

[0018] The preparation method of heat-resistant wrought aluminum alloy is to add aluminum ingots during smelting, raise the temperature to 750°C, after the aluminum ingots are completely melted, add other components in turn; after stirring evenly, keep warm for 20 minutes, refine for 30 minutes, and keep warm for 50 minutes ;Casting after removing slag and ash, the casting temperature is controlled at 680°C, and the casting machine speed is controlled at 75mm / min; rolling is carried out at 620°C, and the final rolling temperature is 530°C; the alloy is annealed at 380°C for 15 hours . The tensile strength of the aluminum alloy obtained by the present invention is 378MPa, the elongation is 5.7%, and the Brinell streng...

technical field

[0001] The invention relates to a heat-resistant forged aluminum alloy. Background technique

[0002] Heat-resistant aluminum alloys are alloys that can be used at higher temperatures without softening. Among them, Al-Cu-Mg aluminum alloys are widely used as structural materials in the aerospace field due to their high strength and good heat resistance. , but the alloy mainly works in an environment below 100°C, and above 100°C, the coarsening of the strengthening phase will significantly reduce its mechanical properties.

[0003] According to the processing method, aluminum alloys can be divided into denatured aluminum alloys and cast aluminum alloys. Deformed aluminum alloys are further divided into non-heat-treatable aluminum alloys and heat-treatable aluminum alloys. The latter can be improved by heat treatment methods such as quenching and aging. Mechanical properties , can be divided into duralumin, wrought aluminum (LD + digital designation), supe...

Examples

Embodiment 1

[0011] A heat-resistant forged aluminum alloy, characterized by containing the following metal elements: 0.05% silicon, 0.8% iron, 1.5% copper, 0.2% manganese, 1% magnesium, 1% nickel, 0.1% zinc, 0.05% titanium, and 0.01% molybdenum % and the balance of aluminum.

[0012] The preparation method of heat-resistant wrought aluminum alloy is to add aluminum ingot during smelting, raise the temperature to 700°C, after the aluminum ingot is completely melted, add other components in turn; after stirring evenly, after holding for 50 minutes, refining for 30 minutes, and holding for 30 minutes ;Casting after removing slag and ash, the casting temperature is controlled at 500°C, and the casting machine speed is controlled at 80mm / min; rolling is carried out at 490°C, and the final rolling temperature is 300°C; the alloy is annealed at 380°C for 10 hours . The aluminum alloy obtained by the present invention has a tensile strength of 570MPa, an elongation of 5%, and a Brinell strength ...

Embodiment 2

[0014] A heat-resistant forged aluminum alloy, characterized by containing the following metal elements: 0.10% silicon, 1.5% iron, 3.0% copper, 0.5% manganese, 2% magnesium, 2% nickel, 0.5% zinc, 0.15% titanium, molybdenum 1 % and the balance of aluminum.

[0015] The preparation method of heat-resistant wrought aluminum alloy is to add aluminum ingots during smelting, raise the temperature to 780°C, after the aluminum ingots are completely melted, add other components in turn; after stirring evenly, keep warm for 30 minutes, refine for 20 minutes, and keep warm for 40 minutes ;Casting after removing slag and ash, the casting temperature is controlled at 520°C, and the casting machine speed is controlled at 90mm / min; rolling is carried out at 590°C, and the final rolling temperature is 380°C; the alloy is annealed at 400°C for 20h . The tensile strength of the aluminum alloy obtained by the present invention is 498MPa, the elongation is 3.7%, and the Brinell strength is 150HB...

Embodiment 3

[0017] A heat-resistant forged aluminum alloy, characterized by containing the following metal elements: 0.08% silicon, 1.0% iron, 2.0% copper, 0.3% manganese, 1.5% magnesium, 1.5% nickel, 0.3% zinc, 0.1% titanium, 0.5% molybdenum % and the balance of aluminum.

[0018] The preparation method of heat-resistant wrought aluminum alloy is to add aluminum ingots during smelting, raise the temperature to 750°C, after the aluminum ingots are completely melted, add other components in turn; after stirring evenly, keep warm for 20 minutes, refine for 30 minutes, and keep warm for 50 minutes ;Casting after removing slag and ash, the casting temperature is controlled at 680°C, and the casting machine speed is controlled at 75mm / min; rolling is carried out at 620°C, and the final rolling temperature is 530°C; the alloy is annealed at 380°C for 15 hours . The tensile strength of the aluminum alloy obtained by the present invention is 378MPa, the elongation is 5.7%, and the Brinell streng...