Influence of temperature of forging aluminum alloy

1. The high temperature deformation resistance of various aluminum alloys in aluminum alloy forging varies greatly. The deformation resistance (also known as flow stress) of aluminum alloys varies significantly with different components. Some low-strength aluminum alloys and medium-strength aluminum alloys, such as 6000 series aluminum alloys, have low high-temperature deformation resistance, while high-strength aluminum alloys, especially ai-zn -mg-cu aluminum alloy, such as 7000 series aluminum alloy, has higher high temperature deformation resistance, for example, the strength limit of wrought aluminum 2a50 aluminum alloy at 500 degrees Celsius is 20mpa, while the strength limit of duralumin 2a12 aluminum alloy at 500 degrees Celsius is 40mpa, the difference between the two is - times, that is, the The forging deformation load is about 2 times different.

2. The room temperature deformation resistance of most commonly used deformed aluminum alloys is lower than that of carbon steel, but there are three types 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 (changes rapidly with the increase or decrease of temperature): as the temperature decreases, its high temperature deformation resistance increases rapidly, faster than carbon steel. It can be seen from the comparison that the growth rate of the high temperature strength limit is faster than that of the alloy structural steel when the carbon steel is dry. The temperature of the carbon steel and the low alloy structural steel drops by 100 degrees Celsius, and the strength limit increases by about 50%. However, when the temperature of aluminum alloy drops by 50 degrees Celsius, the strength limit increases by 50%-300%. Therefore, aluminum alloys, especially those with high alloying degree, cannot be forged at low temperatures. Therefore, the forging temperature range of aluminum alloys is narrow, and the operation should fast. The deformation resistance of aluminum alloy die forging determines the strength limit of the material itself, the processing conditions and the complexity of the forging.