Aluminum alloy substrate for high-cap bottle cap and production method thereof

Abstract

The invention discloses an aluminum alloy substrate for a high-cap bottle cap. The aluminum alloy substrate comprises, by weight, 0.4 percent to 0.8 percent of Si, 0.6 percent to 0.9 percent of Fe, 0.02 percent to 0.04 percent of Cu, no larger than 0.1 percent of Mn, no larger than 0.05 percent of Mg, no larger than 0.1 percent of Zn, no larger than 0.05 percent of Cr, 0.01 percent to 0.03 percent of Ti, no larger than 0.15 percent of impurities and the balance Al. The invention further discloses a production method of the aluminum alloy substrate for the high-cap bottle cap. The production procedure comprises batching, casting, homogenization treatment, hot continuous rolling, cold rolling, heat treatment, cold rolling, stretching bending and straightening and cropping. In the procedure of homogenization treatment, the temperature of homogenization treatment is 550 DEG C to 600 DEGC, and heat preservation time is 6 h to 10 h; in the procedure of cold rolling, cold rolling is carried out on blanks obtained through the hot continuous rolling procedure till the blanks are 0.4 mm to 0.5 mm, then heat treatment is carried out, the temperature of heat treatment ranges from 300 DEG C to 330 DEG C, heat preservation time ranges from 5 h to 9 h, and discharging cooling is carried out. Finally, cold rolling is carried out the blanks till the designed thickness is achieved.

Description

technical field [0001] The invention relates to an aluminum alloy and a production method thereof, in particular to an aluminum alloy base material for a high cap bottle cap and a production method thereof. Background technique [0002] As a new type of bottle cap sealing material, aluminum alloy bottle cap material is widely used in the sealing packaging of beverage bottles, wine bottles, cosmetic bottles, medicine bottles, etc. 8011 aluminum alloy is the mainstream anti-theft cover material. In its subsequent processing, in addition to good deep drawing performance and low ear making rate, it is also required to have good baking resistance. [0003] The current production of 8011 aluminum alloy bottle cap materials in H16 / H14 state has the problems of poor thermal stability, low tensile strength and unstable ear making rate when punching high bottle caps with a height of more than 50mm. , resulting in low yield and poor formability of punched bottle caps. Contents of th...

AI Technical Summary

Problems solved by technology

[0003] The current production of 8011 aluminum alloy bottle cap materials in H16 / H14 state has the problems of poor thermal stability, low tensile strength and unstable ear making rate when punching high bottle caps with a height of more than 50mm. , leading to low yield and poor formability of punched bottle caps