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A method to improve the electrical conductivity of al-mg-si alloy

A technology of al-mg-si and electrical conductivity, which is applied in the field of metallurgy to achieve the effect of improving electrical conductivity

Inactive Publication Date: 2016-06-01
河南省圣昊新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, for aluminum alloys that require a specific level of mechanical properties and electrical conductivity at the same time, it can only be achieved by controlling the on-line and post-heat treatment processes.

Method used

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  • A method to improve the electrical conductivity of al-mg-si alloy

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] A method for improving electrical conductivity of Al-Mg-Si alloy, the steps are:

[0015] 1) Reasonable deployment of chemical components: control Fe0.4%, Si0.4%, Mg0.45%;

[0016] 2) Control the content of Cr, Mn, and Ti elements: control Cr0.02%, Mn0.03%, Ti0.02%, other impurity element monomer content 0.02%, impurity sum 0.09%;

[0017] 3) Refining the casting structure of the cast rod so that the grain size is less than 2 grades;

[0018] 4) Use Al-Ti-B to refine the casting structure;

[0019] 5) Improve the purity of internal P in the cast rod, control H<0.18ml / 100gAl, the content of oxide inclusions with a particle size of 10 μm or more is less than 5%, and the content of 5 μm or more is less than 50%.

[0020] Alloy Conductivity Comparison:

[0021]

Embodiment 2

[0023] A method for improving electrical conductivity of Al-Mg-Si alloy, the steps are:

[0024] 1) Reasonable deployment of chemical components: control Fe0.35%, Si0.32%, Mg0.47%.

[0025] 2) Control the content of Cr, Mn and Ti elements: control Cr0.025%, Mn0.035%, Ti0.025%, and other impurity element content 0.025%;

[0026] 3) Refining the casting structure of the cast rod so that the grain size is less than 2 grades;

[0027] 4) Use Al-Ti-B to refine the casting structure;

[0028] 5) Improve the purity of internal P in the cast rod, control H<0.18ml / 100gAl, the content of oxide inclusions with a particle size of 10 μm or more is less than 5%, and the content of 5 μm or more is less than 50%.

[0029] Alloy Conductivity Comparison:

[0030]

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Abstract

The invention discloses a method for increasing the electric conductivity of an Al-Mg-Si alloy. The method comprises the following steps: (1) reasonably blending chemical components, and controlling Fe to be less than 0.2%, Si to be less than or equal to 0.4% and Mg to be less than or equal to 0.55%; and (2) controlling the content of elements such as Cr, Mn and Ti; (3) refining the cast structure of a cast rod so as to enable the grain size of the cast rod to be less than two-grade; (4) using Al-Ti-B for refining the cast structure; and (5) improving the in-P purity of the cast rod, and controlling H to be less than 0.18ml / 100gAl, the content of oxide inclusion with the particle size of above 10 micrometers to be less than 5%, and the content of the oxide inclusion with the particle size of above 5 micrometers to be less than 50%. The method has the beneficial effects that the inner structure of the aluminium alloy is ordered by controlling the content of each element in the aluminium alloy, the elements can be chemically combined with certain elements unfavorable to electric conductivity in the step B to form an insoluble compound, and the insoluble compound is separated out from a solid solution, thus the electric conductivity of the alloy is improved.

Description

technical field [0001] The invention relates to a method for improving the electrical conductivity of an Al-Mg-Si alloy, which belongs to the technical field of metallurgy. Background technique [0002] For aluminum alloys, as the content of alloying elements such as Mg and Si increases, the peak aging strength increases and the electrical conductivity decreases, which limits the further application of the alloy in the field of conductive materials; improving the electrical conductivity of aluminum alloys can be achieved by controlling the metallurgical quality. Reduce the content of Mg, Si, Fe and other elements, and adopt overaging treatment, such as T7 state. However, for aluminum alloys that require a specific level of mechanical properties and electrical conductivity at the same time, it can only be achieved by controlling the on-line and post-heat treatment processes. For a precipitation-strengthened aluminum alloy with a certain composition range, the number and conf...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/08
Inventor 张梅赵建国吴英杰
Owner 河南省圣昊新材料股份有限公司