Aa6xxx aluminum alloy sheet with high anodized quality and method for making same
A technology of anodic oxidation and high quality, which is applied in the direction of anodic oxidation, and can solve the problems of reducing material yield and so on
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example 1
[0044] Coil preparation
[0045] use figure 1 Coils A, B, and C were prepared using processes A, B, and C, respectively, using the general procedure shown in and detailed below. The ingots used to make coils A, B and C were cast using DC castings from AA6063 alloy with the composition shown in Table 1 and exfoliated using methods known to those skilled in the art.
[0046] Table 1
[0047] Si Fe Cu mn Mg Cr Zn Ti 0.41 0.16 0.025 0.005 0.60 0.003 0.001 0.012
[0048] All are expressed in weight %; the remainder is Al.
[0049] Procedure A: The ingot was heated from room temperature to 560°C and allowed to soak for approximately four hours. The ingot was then cooled to 540°C and allowed to soak for approximately one hour. The resulting ingots were then hot rolled using a hot reversing mill and a hot tandem mill, wherein the ingots were hot rolled to a 5 mm thick gauge. The resulting sheet was wound at a temperature of 380°C. The coil...
example 2
[0053] Coil property test
[0054] Coils prepared according to procedures A, B and C are optionally subjected to an aging procedure. A T4 temper was prepared by allowing the coil to age naturally for 5 days. The T6 temper was prepared by artificially aging the coil by heating at a temperature of about 175°C for 8 hours. The T7 temper was prepared by artificially aging the coil by heating at a temperature of about 175°C for 24 hours. Table 2 summarizes the physical and mechanical properties of coils prepared according to procedures A, B and C at different tempers and heated to different PMTs during CASH practice. Presents yield strength (YS) in MPa, ultimate tensile strength (UTS) in MPa, elongation in % (El), average grain size (µm), orange peel defect measurement (using 5 mm Bending radius) and thermal conductivity (W / mK) (see Table 2).
[0055] Table 2
[0056]
[0057] As shown in Table 2, various physical and mechanical properties desired by customers can be obtain...
example 3
[0059] aging curve
[0060] AA6063 alloy sheets prepared from the compositions of Table 1 were processed using CASH practice by heating to peak metal temperatures of 520°C and 540°C. The sheets were allowed to age at 175°C for 20 hours. Hardness was determined at different intervals throughout the aging process, and aging curves were prepared for each of the alloys (see figure 2 ). Such as figure 2 As shown in , the maximum strength for each of the alloy sheets is obtained after heating for 8 hours. This result is indicative of the heat treatment conditions necessary to achieve desirable hardness properties.
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