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High-toughness manganese-containing aluminum alloy

A manganese-aluminum alloy and high-strength technology, which is applied in the field of high-strength and tough aluminum alloys, can solve the problems of increasing hot cracking tendency macro-segregation, reducing the plastic toughness of aluminum alloys, and deteriorating the comprehensive properties of materials, so as to promote uniform plastic deformation, increase strength, The effect of ensuring uniform plastic deformation

Inactive Publication Date: 2009-10-28
UNIV OF SCI & TECH BEIJING
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Problems solved by technology

[0005] Existing studies have proved that increasing the content of alloying element Zn in aluminum alloys can significantly increase the strength of aluminum alloys. With the increase of Zn content, the strength of aluminum alloys increases, while the plasticity and toughness of aluminum alloys decrease significantly. , the corrosion resistance of the material is reduced, and the overall performance of the material is deteriorated
At the same time, because the melting point of Zn element is relatively low and the density is relatively high, too high Zn content will increase the thermal cracking tendency in the material preparation process and easily produce macrosegregation.

Method used

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  • High-toughness manganese-containing aluminum alloy
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Embodiment Construction

[0013] The composition used in the aluminum alloy example is shown in Table 1:

[0014] Table 1 example composition list (unit: wt %)

[0015]

[0016] Adopt the following preparation process:

[0017] 1. Preparation of manganese-containing high-strength and tough aluminum alloy deposition blanks by spray forming.

[0018] According to the composition of the prepared high-strength and tough aluminum alloy, put the commercially available aluminum-based master alloy into the induction melting furnace, and then vacuumize it. After reaching a certain vacuum degree, wash the furnace twice with high-purity nitrogen gas and then melt the aluminum alloy. After all the aluminum alloys are melted, they are spray-formed to produce deposited blanks of manganese-containing high-strength and tough aluminum alloys. The specific process parameters are as follows: melt temperature 850 ° C, atomization pressure 0.5 MPa, diversion nozzle diameter 3 mm, receiving distance 450 mm, The eccent...

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Abstract

The present invention relates to a high-strength and tough aluminum alloy, in particular to a high-strength and high-toughness 7000 series aluminum alloy material prepared by spray forming. , Cu: 1.5-2.0wt%, Mn: 0.8-2.5wt%, Zr: 0.1-0.3wt%, Ti: 0.01-0.3wt%, B: 0.005-0.05wt%, Al: balance. In addition to the common G.P zone, η' and η(MgZn2) phases, the strengthening phase of the high-strength aluminum alloy also has a finely dispersed manganese-containing intermetallic compound, which makes it have a tensile strength of more than 800MPa and a content of 5.3% or more. Elongation, with better heat resistance, can improve the structural efficiency and performance of aerospace and transportation materials.

Description

technical field [0001] The invention relates to a high-strength and tough aluminum alloy, in particular to a high-strength and high-toughness 7000 series aluminum alloy material prepared by spray forming. Background technique [0002] Ultra-high-strength Al-Zn-Mg-Cu(7000) series aluminum alloy is one of the highest strength aluminum alloys. How to obtain higher strength and toughness is an important direction and frontier issue in the research of high-strength aluminum alloys. [0003] As a precipitation-strengthened high-strength aluminum alloy, its high strength is mainly achieved through the precipitation of a large number of fine, uniformly distributed nano-scale particles. In addition, obtaining a fine and uniform matrix structure and a uniform distribution of submicron or finer intermetallic compound disperse phase particles on the matrix will also significantly increase the strength of the aluminum alloy and improve the plasticity and toughness of the aluminum alloy. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/10
Inventor 张济山蔡元华崔华李永兵
Owner UNIV OF SCI & TECH BEIJING
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