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High-impact 7-series aluminum alloy and preparation method thereof

An aluminum alloy, high impact technology, applied in the field of aluminum alloy materials, can solve problems such as the inability to achieve the ideal solution treatment effect, and achieve the effect of improving impact performance and improving dispersion strengthening effect.

Pending Publication Date: 2020-11-20
福建祥鑫股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] The 7-series aluminum alloy is a typical medium-strength alloy in the Al-Zn-Mg series. The alloy has good plastic processing properties and has moderate strength after artificial aging. The application has been dedicated to the electronics industry from the previous transportation field, and the most obvious is the continuous promotion of the application in PC products. At this stage, 7-series aluminum alloys are mainly used for sheet metal processing in the PC field. Due to the general 7-series alloy extrusion processing Post-online quenching cannot achieve the ideal solution treatment effect, and off-line quenching is required to obtain higher strength and mechanical properties

Method used

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  • High-impact 7-series aluminum alloy and preparation method thereof
  • High-impact 7-series aluminum alloy and preparation method thereof

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preparation example Construction

[0019] A method for preparing high-impact 7-series aluminum alloys, comprising the following steps: (a) smelting master alloys: using pure zinc ingots, pure aluminum ingots and pure magnesium ingots for Zn, Al, and Mg, and using aluminum ingots for Si, Fe, Mn, Cu, and Cr Silicon intermediate alloy, aluminum-iron intermediate alloy, aluminum-manganese intermediate alloy, aluminum-copper intermediate alloy and aluminum-chromium intermediate alloy; put the pure aluminum ingot into the furnace, set the furnace gas temperature to 760°C, keep the pure aluminum ingot for 30 minutes after melting Then add aluminum-copper master alloy, aluminum-manganese master alloy, aluminum-iron master alloy and pure magnesium ingots into the smelting furnace according to the block weight and size from large to small, and then raise the temperature of the furnace gas by 15°C and keep it warm until the master alloy After all the magnesium ingots are melted, the temperature of the furnace gas is increa...

Embodiment 1

[0025] A high-impact 7-series aluminum alloy, the high-impact 7-series aluminum alloy includes the following components: Si0.15%, Fe1.05%, Cu0.5%, Mn0.4%, Mg2.0%, Cr0.10% , Zn7.0%, Zr0.3%, Ti0.05%, other alloying elements individually ≤0.05%, total less than 0.15%.

Embodiment 2

[0027] A high-impact 7-series aluminum alloy, Si0.1%, Fe0.06%, Cu0.6%, Mn0.4%, Mg2.2%, Cr0.12%, Zn7.5%, Zr0.25%, Ti0 .05%, other alloying elements individually ≤0.05%, less than 0.15% in total, and the balance is Al.

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Abstract

The invention discloses a high-impact 7-series aluminum alloy. The high-impact 7-series aluminum alloy comprises the following components of 0.1%-0.2% of Si, less than or equal to 0.2% of Fe, 0.35%-0.6% of Cu, less than or equal to 0.5% of Mn, 1.5%-2.5% of Mg, less than or equal to 0.15% of Cr, 6.0%-7.5% of Zn, 0.25%-0.35% of Zr, less than or equal to 0.1% of Ti and the balance Al, wherein other alloy elements are less than or equal to 0.05% individually and less than 0.15% totally, a ratio of the Si to the Fe is 1:0.6-0.8, and a ratio of the Zn to the Mg is 3.4-3.6:1.

Description

technical field [0001] The invention belongs to the field of aluminum alloy materials, and in particular relates to a high-impact 7-series aluminum alloy and a preparation method thereof. Background technique [0002] The 7-series aluminum alloy is a typical medium-strength alloy in the Al-Zn-Mg series. The alloy has good plastic processing properties and has moderate strength after artificial aging. The application has been dedicated to the electronics industry from the previous transportation field. The most obvious is the continuous promotion of the application in PC products. At this stage, 7-series aluminum alloys are mainly used for sheet metal processing in the PC field. Post-online quenching cannot achieve the ideal solution treatment effect, and off-line quenching is required to obtain higher strength and mechanical properties. In order to meet the requirements of the market for its performance and other aspects, a new type of 7-series alloy with a certain content ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/10C22C1/03C22F1/053
CPCC22C1/026C22C1/03C22C21/10C22F1/002C22F1/053
Inventor 黄祯荣黄铁明冯永平刘金霞刘馥兵
Owner 福建祥鑫股份有限公司
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