1. The high temperature deformation resistance of various aluminum alloys varies greatly. The deformation resistance (also called flow stress) of aluminum alloys changes obviously with different compositions. Some low-strength aluminum alloys and medium-strength aluminum alloys, such as 6000 series aluminum alloys, have lower high-temperature deformation resistance, while high-strength aluminum alloys, especially ai-zn-mg-cu aluminum alloys, such as 7000 series aluminum alloys, have higher high-temperature deformation resistance, such as forged aluminum 2a50 aluminum alloy with a strength limit of 20mpa at 500 degrees Celsius and hard aluminum 2a12 aluminum alloy with a strength limit of 40mpa at 500 degrees Celsius.

2. Most commonly used deformed aluminum alloys have lower room temperature deformation resistance than carbon steel, but there are three kinds of high temperature deformation resistance: lower than carbon steel, equivalent to carbon steel, and higher than carbon steel.

3. The deformation resistance of aluminum alloy is very sensitive to temperature (it changes rapidly with the increase or decrease of temperature): with the decrease of temperature, its high-temperature deformation resistance increases rapidly, faster than that of carbon steel. By comparison, it can be seen that the growth rate of high-temperature strength limit is higher than that of carbon steel dry-time alloy structural steel, and the temperature of carbon steel and low-alloy structural steel decreases by 100 degrees Celsius, and the strength limit increases by about 50%. However, the temperature of aluminum alloy drops by 50 degrees Celsius, and the strength limit increases by 50%-300%. Therefore, aluminum alloy, especially aluminum alloy with high alloying degree, cannot be finally forged at low temperature, so the forging temperature range of aluminum alloy is narrow and the operation should be rapid. The deformation resistance of aluminum alloy in die forging production determines the strength limit, processing conditions and complexity of forgings.

Density and introduction of aluminum alloy forged by aluminum alloy

Aluminum alloys can be divided into wrought aluminum alloys and forged aluminum alloys according to processing methods. Deformed aluminum alloys can be divided into non-heat-treated strengthened aluminum alloys and heat-treated strengthened aluminum alloys. Non-heat-treated strengthened aluminum alloys can not improve their mechanical properties through heat treatment, but can only be strengthened through cold working deformation, which mainly includes high-purity aluminum, industrial high-purity aluminum, industrial pure aluminum and rust-proof aluminum. Heat-treated strengthened aluminum alloys can improve their mechanical properties through heat treatment means such as quenching and aging, and can be divided into hard aluminum, forged aluminum, superhard aluminum and special aluminum alloys.

Aluminum alloys are divided into two categories: cast aluminum alloys, which are used in as-cast state; Deformed aluminum alloy can withstand pressure processing, and can be processed into aluminum alloy materials of various shapes and specifications. It is mainly used for manufacturing aviation equipment, doors and windows for buildings, etc.

Aluminum alloy has low density, but high strength, close to or higher than high-quality steel, good plasticity, can be processed into various profiles, has excellent electrical conductivity, thermal conductivity and corrosion resistance, and is widely used in industry, and its usage is second only to steel.

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