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A manufacturing method and high-toughness technology, which is applied in the manufacture of high-toughness small-sized high-Zn aluminum alloy round ingots and high-strength fields, and can solve the problems of difficult melt quality control and small-sized round ingots with a high tendency to crack. , to achieve the effect of avoiding internal tissue defects, qualified internal quality, and reducing gas and inclusions
Inactive Publication Date: 2015-10-21
NORTHEAST LIGHT ALLOY CO LTD
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[0003] The present invention aims to provide a high-strength, high-toughness, small-sized, high-Zn aluminum alloy round ingot manufacturing method for the existing small-size round ingots with a high tendency to crack and difficult melt quality control.
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specific Embodiment approach 1
[0011] Embodiment 1: In this embodiment, a method for manufacturing a high-strength, high-toughness small-sized high-Zn aluminum alloy round ingot is carried out according to the following steps:
[0012] 1. Weigh high-purity aluminum ingots according to the mass percentage of Cu2.0%-2.5%, Mg2.3%-3.0%, Zn8.4%-9.0%, Zr0.1%-0.2%, and the balance is pure Al, Al-Zr master alloy, Cu plate, Zn ingot and Mg ingot;
[0013] Two, the high-purity aluminum ingot, Al-Zr master alloy, Cu plate, Zn ingot and Mg ingot weighed in step one are loaded into the resistance reverberatory furnace furnace successively and melted, and the high-purity aluminum ingot, Al-Zr master alloy, After the Cu plate, Zn ingot and Mg ingot are completely melted, the melt is obtained, and the Al-Be master alloy is added to the melt at a temperature of 730 ° C ~ 750 ° C, and the stirring is continued until the Al-Be master alloy is melted. , to obtain an aluminum alloy melt, adjust the Cu element in the aluminum a...
specific Embodiment approach 2
[0018] Embodiment 2: This embodiment differs from Embodiment 1 in that the pure Al described in step 1 is high-purity Al with low Si and Fe. Others are the same as the first embodiment.
specific Embodiment approach 3
[0019] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: in step one, Cu2.2%, Mg2.7%, Zn8.7%, Zr0.12% and balance are pure Al weighs high-purity aluminum ingot, Al-Zr master alloy, Cu plate, Zn ingot and Mg ingot. Others are the same as those in Embodiment 1 or 2.
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Abstract
The invention relates to a manufacturing method of a high-strength high-tenacity small-size circular high-Zn-content aluminum alloy cast ingots. The manufacturing method aims to solve the problems that an existing small-size circular cast ingot is high in fracture tendency, and it is difficult to control the quality of melt. The manufacturing method comprises the steps that firstly, melting is conducted; secondly, casting forming is conducted. The manufacturing method has the advantages that an out-of-furnace online degassing technology is adopted, and therefore the purity of melt is effectively improved; production and casting are conducted through a thermal ejection tool, the casting speed is high, and the surface quality is good; Al-Be intermediate alloy is added, and the tendency of melting loss of alloying elements is lowered; it is avoided that pure aluminum is laid as the bottom at the beginning of casting, so that the operation difficulty at the beginning of casting is lowered for workers; an argon and chlorine mixed refining method is adopted by holding furnace refining, and the hydrogen and alkali metal in the melt are fundamentally removed. The manufacturing method is mainly used for manufacturing small-size circular aluminum ingots.
Description
technical field [0001] The invention relates to a method for manufacturing a high-strength, high-toughness small-sized high-Zn aluminum alloy round ingot. Background technique [0002] Aluminum alloy has the advantages of low density and high specific strength, and has important application value in many fields. Al-Zn-Mg-Cu aluminum alloys have the advantages of high strength and toughness. As the user's requirements for product performance increase, the performance of the ingot billet needs to be improved accordingly, and the pressure on the casting plant is also increasing. Therefore, it is imminent to study the melting and casting process of large-scale aluminum alloy round ingots to meet market demand. Contents of the invention [0003] The present invention provides a high-strength, high-toughness, small-sized, high-Zn aluminum alloy round ingot manufacturing method for the existing small-size round ingots with a high tendency to crack and difficult melt quality con...
Claims
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