T/CIPR 0011-2022 New energy vehicle battery tray high-strength aluminum alloy profiles preparation method

Scope

Main technical content: 1. This technology optimizes the mass percentages of various chemical components in aluminum alloy profiles. Sufficient Si elements can refine the grain structure and improve the strength of aluminum alloys, playing a supplementary role in strengthening. Adding rare earth elements can enhance the corrosion resistance of aluminum alloy profiles, improve their processability, and promote refining to achieve the purpose of degassing and deslagging. 2. This technology involves two refining processes. During the first refining process, a mixed gas is added, which differs from the conventional practice of introducing a single gas (e.g., N2 or Cl2). This effectively removes hydrogen and impurities from the melt, while avoiding the environmental pollution caused by Cl2 and the health risks to operators and corrosion to equipment. During the second refining process, chloride salts are added to react with the melt to further remove hydrogen and various harmful impurities, preventing the formation of gas pores and inclusions during casting and improving the mechanical properties of aluminum alloy profiles. 3. After homogenization treatment, the particle distribution in the melt becomes more uniform, effectively reducing and eliminating intragranular segregation. This improves the surface quality of finished aluminum alloy profiles, resulting in a smooth surface without obvious stripes or particles. The combination of strong wind cooling and water cooling allows rapid cooling at high temperatures, resulting in fine and dispersed precipitates, which helps improve the tensile strength and yield strength of finished aluminum alloy profiles.

Development Information

Related Standards