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Hard aluminum alloy ingot

A hard aluminum alloy and ingot casting technology, which is applied in the field of aluminum alloy, can solve the problems of increased cooling strength, reduce the tendency of thermal cracks, improve temperature and stress corrosion resistance, and improve stress corrosion resistance.

Active Publication Date: 2015-09-02
丛林铝业科技(山东)有限责任公司
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Problems solved by technology

When the casting speed is reduced, the cooling intensity will increase

Method used

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Embodiment 1

[0007] Example 1 In the hard aluminum alloy casting ingot of the present invention, its non-aluminum alloying elements are: the mass percentage of Si is 0.12%, the mass percentage of Fe is 0.18%, and the mass percentage of Mg is 1.44%. The mass percentage of Mn is 0.30%, the mass percentage of Cu is 0.15%, the mass percentage of Cr is 0.21%, the mass percentage of Zn is 4.60%, and the mass percentage of Zr is 0.14%, The individual mass percentage content of non-detectable impurities is 0.05%, and the total is 0.15%.

[0008] The fine-grained and refined processing technology of the hard aluminum alloy ingot comprises the following steps;

[0009] (1) Dosing first: the base of the alloy is made of 99.85 grade aluminum ingot, and Mg and Zn elements are added in the form of pure metals. Considering that Cu, Cr, Ti, and Zr elements have high melting points and low content in the alloy, the middle added in the form of an alloy;

[0010] (2) Afterwards, the regenerative gas furnac...

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Abstract

The invention relates to a hard aluminum alloy cast ingot and belongs to the technical field of aluminum alloy. The hard aluminum alloy cast ingot comprises the following alloy elements except aluminum by mass percent: 0.12% of Si, 0.18% of Fe, 1.30-1.50% of Mg, 0.30-0.35% of Mn, 0.15% of Cu, 0.2-0.23% of Cr, 4.30-4.60% of Zn, 0.12-0.15% of Zr, 0.05% of single non-detection impurity, and 0.15% of non-detection impurities. The hard aluminum alloy cast ingot, provided by the invention, has excellent thermal deformation performance and higher strength after being subjected to online quenching in extrusion process, the welding property and corrosion resistance of a product are excellent, and the product has certain stress-corrosion resistance and particularly has stronger shock absorption capacity and folding resistance.

Description

technical field [0001] The invention relates to an aluminum alloy, in particular to a hard aluminum alloy ingot. Background technique [0002] The 7N01 alloy is an alloy in the Japanese Aluminum Alloy Standard and belongs to the Al-Zn-Mg series alloy. The extruded profiles produced by this alloy ingot are generally stressed structural parts of high-speed railway car bodies, such as traction beams, frame bolsters, end beams, etc. How to process aluminum alloy ingots with properties similar to or better than 7N01 alloy is a problem to be solved in the same industry in China at present. At present, in the production process of processing 7N01 alloy, defects such as columnar crystals and feather crystals often appear in ingots. These defects will be "inherited" to the extruded material in subsequent production, reducing the mechanical properties of the product. Feather crystals have thick and straight crystal axes, and the mechanical properties have strong anisotropy, which n...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/10
Inventor 张培良苏振佳王刚高安江吴英杰苏本显徐群峰
Owner 丛林铝业科技(山东)有限责任公司
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