A Homogenization Heat Treatment Process for Eliminating Al-cu-mg-si-mn Alloy Casting Crystalline Phase
A technology of homogenization heat treatment and alloy casting, applied in the field of aluminum alloy heat treatment, can solve the problem of incomplete homogenization of eutectic phase and high melting point second phase particles, achieve optimized homogenization effect, increase solid solution amount, and hold time. prolonged effect
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Embodiment 1
[0051]The experimental material is a semi-continuously cast Al-Cu-Mg-Si-Mn alloy ingot, and its chemical composition is: Cu is 4.3wt.%~4.5wt.%, Mg is 0.65wt.%~0.75wt.%, Si 0.6wt.%~0.7wt.%, Mn 0.45wt.%~0.55wt.%, Fe 0.1wt.%~0.2wt.%, Ga<0.03wt.%, P<0.015wt.%, Ti <0.015wt.%, V<0.015wt.%, Zn<0.01wt.%, the total amount of impurities <0.01wt.%, and the balance is Al. The Al-Cu-Mg-Si-Mn alloy ingot was machined into a billet with a diameter of 200 mm for secondary homogenization treatment. First put the billet into the furnace, and raise the temperature to 480°C with the furnace at a speed of 15°C / min. According to the relationship formula between billet diameter and holding time, the holding time is determined to be 12 hours. After the holding time is reached, it is cooled to 300°C with the furnace, quickly taken out of the furnace and air-cooled to room temperature; then the furnace temperature is raised to 515 at a speed of 15°C / min. ℃, put the billet that has been homogenized on...
Embodiment 2
[0054] The experimental material is a semi-continuously cast Al-Cu-Mg-Si-Mn alloy ingot, and its chemical composition is: Cu is 4.3wt.%~4.5wt.%, Mg is 0.65wt.%~0.75wt.%, Si 0.6wt.%~0.7wt.%, Mn 0.45wt.%~0.55wt.%, Fe 0.1wt.%~0.2wt.%, Ga<0.03wt.%, P<0.015wt.%, Ti <0.015wt.%, V<0.015wt.%, Zn<0.01wt.%, the total amount of impurities <0.01wt.%, and the balance is Al. The Al-Cu-Mg-Si-Mn alloy ingot was machined into a billet with a diameter of 200 mm, and the billet was subjected to secondary homogenization treatment. Put the billet into the furnace first, raise the temperature with the furnace to 480°C at a speed of 15°C / min, and hold the holding time for 8 hours. After the holding time is reached, the billet is cooled to 300°C with the furnace, and then taken out of the resistance furnace and air-cooled to room temperature; Raise the furnace temperature of the resistance furnace to 515°C at a speed of 15°C / min, put the homogenized billet into the furnace, keep the billet for 18 ho...
Embodiment 3
[0057] The experimental material is a semi-continuously cast Al-Cu-Mg-Si-Mn alloy ingot, and its chemical composition is: Cu is 4.3wt.%~4.5wt.%, Mg is 0.65wt.%~0.75wt.%, Si 0.6wt.%~0.7wt.%, Mn 0.45wt.%~0.55wt.%, Fe 0.1wt.%~0.2wt.%, Ga<0.03wt.%, P<0.015wt.%, Ti <0.015wt.%, V<0.015wt.%, Zn<0.01wt.%, the total amount of impurities <0.01wt.%, and the balance is Al. The Al-Cu-Mg-Si-Mn alloy ingot was machined into a billet with a diameter of 200 mm, and the billet was subjected to secondary homogenization treatment. Put the billet into the furnace first, and raise the temperature with the furnace to 480°C at a speed of 20°C / min, and the holding time is 10 hours. After the holding time is reached, the billet is cooled to 300°C with the furnace, and then taken out of the resistance furnace and air-cooled to room temperature; Raise the furnace temperature of the resistance furnace to 520°C at a speed of 15°C / min, put the homogenized billet into the furnace, keep the billet for 18 hou...
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