Method for improving internal crystallization of aluminum products
A technology of internal crystallization and products, which is applied in the field of improving the internal crystallization of aluminum products, can solve the problems of great influence on production costs and expensive materials, and achieve the effects of convenient operation, unique process methods, and reduced RE content
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Embodiment 1
[0020] Embodiment 1: A method for improving the internal crystallization of aluminum products. The method is to use primary aluminum as a raw material, add RE elements into a mixing furnace, and after the furnace is full of materials, feed nitrogen into the prepared powder refining agent tank, and pass Put the powder refining agent into the molten aluminum under nitrogen pressure and continuously stir and refine. After refining, stir the molten aluminum evenly, remove the dross from the molten aluminum, and adjust the temperature of the mixing furnace in time to keep it within 700~760°C. Let the molten aluminum stand for 20 to 40 minutes.
[0021] The addition amount of the RE element is 0.03% of the raw material weight, and it is added into the mixing furnace in the form of an Al-RE master alloy.
[0022] The amount of nitrogen introduced is 30Nm 3 / h, the nitrogen pressure is 0.2-0.4MPa, and the time for feeding nitrogen is 20-30 minutes.
[0023] The powder refining agent...
Embodiment 2
[0026] Embodiment 2: A method for improving the internal crystallization of aluminum products. The method is to use primary aluminum as a raw material, add RE elements into a mixing furnace, and after the furnace is full of materials, feed nitrogen into the prepared powder refining agent tank, and pass Put the powder refining agent into the molten aluminum under nitrogen pressure and continuously stir and refine. After refining, stir the molten aluminum evenly, remove the dross from the molten aluminum, and adjust the temperature of the mixing furnace in time to keep it within 700~760°C. Let the molten aluminum stand for 20 to 40 minutes.
[0027] The addition amount of the RE element is 0.05% of the raw material weight, and it is added into the mixing furnace in the form of an Al-RE master alloy.
[0028] The amount of nitrogen introduced is 30Nm 3 / h, the nitrogen pressure is 0.2-0.4MPa, and the time for feeding nitrogen is 20-30 minutes.
[0029] The powder refining agent...
Embodiment 3
[0032] Embodiment 3: A method for improving the internal crystallization of aluminum products. The method is to use primary aluminum as a raw material, add RE elements into a mixing furnace, and after the furnace is full of materials, feed nitrogen into the prepared powder refining agent tank, and pass Put the powder refining agent into the molten aluminum under nitrogen pressure and continuously stir and refine. After refining, stir the molten aluminum evenly, remove the dross from the molten aluminum, and adjust the temperature of the mixing furnace in time to keep it within 700~760°C. Let the molten aluminum stand for 20 to 40 minutes.
[0033] The addition amount of the RE element is 0.09% of the raw material weight, and it is added into the mixing furnace in the form of an Al-RE master alloy.
[0034] The amount of nitrogen introduced is 30Nm 3 / h, the nitrogen pressure is 0.2-0.4MPa, and the time for feeding nitrogen is 20-30 minutes.
[0035] The powder refining agent...
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