Effect of Aluminum Foil Quality on Pinhole

2017/7/20 10:36:11

(1) the relationship between the quality of aluminum foil and pinholes from the internal aluminum foil wool quality, the import of wool are generally compounds, mainly FeSiA β and α phase, but the domestic aluminum foil wool is mainly FeSiAa phase and FeAl3-led Compounds. FeSiA a phase is relatively ideal compound, very easy to break, FeAl3 belongs to the coarse compound phase, is the main factor leading to the number of pinholes, due to the thickness of 6 ~ 7um double aluminum foil, as long as more than 5um of the second There will be pinholes, but not with the smaller grain to illustrate the better, less than 1um of the grain will be appropriate to improve the work hardening rate, will lead to increased deformation resistance, reduce the plastic deformation capacity, in the processing time, will Very easy to pinhole, therefore, the need for appropriate aluminum foil wool compound size control between 1 ~ 5um.

(2) aluminum foil wool silicon, iron content to the aluminum foil pinhole number of the impact If the aluminum foil wool is relatively high silicon, iron content, will make the rise in solid solution iron, silicon content, especially with a relatively high solid solution Silicon content, it will increase the degree of hardening work, increase the deformation of the pressure, in the production of aluminum foil, such as relatively thin, will increase the number of pinholes. Full analysis of aluminum foil rolling, more suitable for the use of 1235-H14 type aluminum alloy, with Fe greater than the content of Si, and the ratio between the 2.0 ~ 3.5, generally suitable for the choice of 0.08 ~ 0.15% Si content.

(3) the effect of hydrogen remaining in the crystal. Aluminum foil wool with more hydrogen when it will form a certain trachoma or bubbles, will to some extent affect the processing of aluminum foil finished pinhole and processing performance, in the rolling of the larger thickness of the aluminum foil, it will not appear Pinhole, but in the rolling double aluminum foil, it will form hydrogen to make pinholes, so in the process of rolling, should strictly control the hydrogen content, more suitable for the value of 0.08 ~ 0.12mL / 100g.