Homogenizing heat treatment technology for eliminating Al-Cu-Mg-Si-Mn alloy casting crystal phase
A technology of homogenization heat treatment and alloy casting, which is applied in the field of aluminum alloy heat treatment, can solve the problems of incomplete homogenization of eutectic phase and high melting point second phase particles, achieve optimized homogenization effect, increase solid solution amount, and homogenize degree of effect
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[0052] Example 1
[0053] The experimental material is a semi-continuously cast Al-Cu-Mg-Si-Mn alloy ingot, its chemical composition is: Cu is 4.3wt.%~4.5wt.%, Mg is 0.65wt.%~0.75wt.%, Si It is 0.6wt.%~0.7wt.%, Mn is 0.45wt.%~0.55wt.%, Fe is 0.1wt.%~0.2wt.%, Ga<0.03wt.%, P<0.015wt.%, Ti <0.015wt.%, V<0.015wt.%, Zn<0.01wt.%, total impurity<0.01wt.%, and the balance is Al. The Al-Cu-Mg-Si-Mn alloy ingot is machined into a billet with a diameter of 200 mm for secondary homogenization. First put the billet into the furnace, and heat up with the furnace to 480°C at a rate of 15°C / min. According to the relationship between the diameter of the blank and the holding time, the holding time is determined to be 12 hours. After the holding time is reached, the furnace is cooled to 300°C, quickly taken out of the furnace and air-cooled to room temperature; then the furnace temperature is raised to 515 at a rate of 15°C / min ℃, put the once homogenized billet into the furnace. After the bill...
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[0055] Example 2
[0056] The experimental material is a semi-continuously cast Al-Cu-Mg-Si-Mn alloy ingot, its chemical composition is: Cu is 4.3wt.%~4.5wt.%, Mg is 0.65wt.%~0.75wt.%, Si It is 0.6wt.%~0.7wt.%, Mn is 0.45wt.%~0.55wt.%, Fe is 0.1wt.%~0.2wt.%, Ga<0.03wt.%, P<0.015wt.%, Ti <0.015wt.%, V<0.015wt.%, Zn<0.01wt.%, total impurity<0.01wt.%, and the balance is Al. The Al-Cu-Mg-Si-Mn alloy ingot is machined into a billet with a diameter of 200 mm, and the billet is subjected to secondary homogenization treatment. First put the billet into the furnace and heat it up to 480°C with the furnace at a rate of 15°C / min. The holding time is 8 hours. After the holding time is reached, the billet is cooled with the furnace to 300°C, and taken out of the resistance furnace to air-cool to room temperature; Raise the furnace temperature of the resistance furnace to 515°C at a rate of 15°C / min, put the once homogenized blank into the furnace, and after the blank is kept warm for 18 hou...
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[0058] Example 3
[0059] The experimental material is a semi-continuously cast Al-Cu-Mg-Si-Mn alloy ingot, its chemical composition is: Cu is 4.3wt.%~4.5wt.%, Mg is 0.65wt.%~0.75wt.%, Si It is 0.6wt.%~0.7wt.%, Mn is 0.45wt.%~0.55wt.%, Fe is 0.1wt.%~0.2wt.%, Ga<0.03wt.%, P<0.015wt.%, Ti <0.015wt.%, V<0.015wt.%, Zn<0.01wt.%, total impurity<0.01wt.%, and the balance is Al. The Al-Cu-Mg-Si-Mn alloy ingot is machined into a billet with a diameter of 200 mm, and the billet is subjected to secondary homogenization treatment. First put the billet into the furnace, and heat it up to 480°C with the furnace at a rate of 20°C / min. The holding time is 10 hours. After the holding time is reached, the billet is cooled to 300°C with the furnace and taken out of the resistance furnace to air-cool to room temperature; Raise the furnace temperature of the resistance furnace to 520°C at a rate of 15°C / min, put the once homogenized billet into the furnace. After the billet is kept warm for 18 hour...
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