CN103757503B - A kind of method improving electric conductivity of Al-Mg-Si alloy - Google Patents
A kind of method improving electric conductivity of Al-Mg-Si alloy Download PDFInfo
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- CN103757503B CN103757503B CN201310747442.8A CN201310747442A CN103757503B CN 103757503 B CN103757503 B CN 103757503B CN 201310747442 A CN201310747442 A CN 201310747442A CN 103757503 B CN103757503 B CN 103757503B
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Abstract
1), rational allocation chemical composition the present invention discloses a kind of method improving electric conductivity of Al-Mg-Si alloy, and step is:: control Fe < 0.2%, Si��0.4%, Mg��0.55%; 2) content of Cr, Mn, Ti element, is controlled; 3) cast structure of, refinement casting rod so that it is grain fineness number < 2 grades; 4), use Al-Ti-B refinement cast structure; 5), improve casting rod the pure degree of interior P, control H < 0.18ml/100gAl, the content < content < 50% of more than 5%, 5 ��m that oxide inclusion granularity is more than 10 ��m. The invention has the beneficial effects as follows: by the content of each element in control aluminium alloy, make aluminium alloy inner structure ordering, can be unfavorable for that the element compounds of electric conductivity forms insoluble compound with some by B in step, precipitate out from sosoloid, and then improve the electric conductivity of alloy.
Description
Technical field
The present invention relates to a kind of method improving electric conductivity of Al-Mg-Si alloy, belong to metallurgical technology field.
Background technology
For aluminium alloy, along with the raising of the alloy element content such as Mg, Si, its peak value aging strength rises and electric conductivity decline, limits the further application of this alloy in electro-conductive material field; Improving aluminium alloy conductivity by control metallurgical quality, to reduce the constituent contents such as Mg, Si, Fe, and adopt Wetted constructures, such as the mode of T7 state occurs. But to requiring the aluminium alloy of specific mechanics performance level and electric conductivity simultaneously, only by controlling online and Post isothermal treatment technique realization. For the precipitation strength type aluminium alloy of certain ingredients scope, come from design of alloy and hot-work history the precipitated phase formed and alloy electric conductivity is had material impact by segregation phase amount, configuration, wherein the quantity of the solid solution effect of strengthening phase and precipitated phase, yardstick and distribution are the principal elements of control alloy strength, what dislocation motion was formed by they complete a business transaction, obstacle and retardation, is conducive to alloy to obtain higher-strength; Meanwhile, increasing and Dispersed precipitate along with precipitate volume fraction, cause unbound electron motion space or mean free path to diminish gradually, alloy conductive rate declines; And crystal boundary segregation phase amount and morphological specificity can be the improvement factors affecting alloy conductive rate. Therefore how effectively to control strengthening phase in alloy hot-work history and precipitate out quantity, and the metallurgy feature of precipitated phase distribution in crystal boundary and crystalline substance, configuration and differentiation thereof in timeliness precipitation process, for acquisition high conductivity and suitably intensity is most important.
Summary of the invention
In order to overcome above-mentioned defect, the present invention provides a kind of method improving electric conductivity of Al-Mg-Si alloy.
In order to realize above-mentioned purpose, the technical scheme of the present invention is: a kind of method improving electric conductivity of Al-Mg-Si alloy, and step is:
1), rational allocation chemical composition: control Fe < 0.2%, Si��0.4%, Mg��0.55%;
2), control Cr, Mn, Ti element content: wherein control Cr < 0.03%, Mn < 0.04%, Ti < 0.03%, other impurity element monomer content < 0.03%, impurity summation < 0.10%;
3) cast structure of, refinement casting rod so that it is grain fineness number < 2 grades;
4), use Al-Ti-B refinement cast structure;
5), improve casting rod the pure degree of interior P, control H < 0.18ml/100gAl, the content < content < 50% of more than 5%, 5 ��m that oxide inclusion granularity is more than 10 ��m.
Further, the Mg+Si < 0.9% in described step 1).
The invention has the beneficial effects as follows: by the content of each element in control aluminium alloy, make aluminium alloy inner structure ordering, can be unfavorable for that the element compounds of electric conductivity forms insoluble compound with some by B in step, precipitate out from sosoloid, and then improve the electric conductivity of alloy.
Embodiment
Below in conjunction with specific embodiment, the present invention is described further.
Embodiment 1
Improving a method for electric conductivity of Al-Mg-Si alloy, step is:
1), rational allocation chemical composition: control Fe0.4%, Si0.4%, Mg0.45%;
2) content of Cr, Mn, Ti element, is controlled: wherein control Cr0.02%, Mn0.03%, Ti0.02%, other impurity element monomer content 0.02%, impurity summation 0.09%;
3) cast structure of, refinement casting rod so that it is grain fineness number < 2 grades;
4), use Al-Ti-B refinement cast structure;
5), improve casting rod the pure degree of interior P, control H < 0.18ml/100gAl, the content < content < 50% of more than 5%, 5 ��m that oxide inclusion granularity is more than 10 ��m.
Alloy conductive rate compares:
Embodiment 2
Improving a method for electric conductivity of Al-Mg-Si alloy, step is:
1), rational allocation chemical composition: control Fe0.35%, Si0.32%, Mg0.47%.
2) content of Cr, Mn, Ti element, is controlled: wherein control Cr0.025%, Mn0.035%, Ti0.025%, other impurity element monomer content 0.025%;
3) cast structure of, refinement casting rod so that it is grain fineness number < 2 grades;
4), use Al-Ti-B refinement cast structure;
5), improve casting rod the pure degree of interior P, control H < 0.18ml/100gAl, the content < content < 50% of more than 5%, 5 ��m that oxide inclusion granularity is more than 10 ��m.
Alloy conductive rate compares:
| Electric conductivity | |
| Untreated alloy | 56.5 |
| The inventive method processed alloy | 61.8 |
The technical scheme of the present invention is not limited to the restriction of above-mentioned specific embodiment, and every technology distortion made according to the technical scheme of the present invention, all falls within protection scope of the present invention.
Claims (2)
1. one kind is improved the method for electric conductivity of Al-Mg-Si alloy, it is characterised in that: step is:
1), rational allocation chemical composition: control Fe < 0.2%, Si��0.4%, Mg��0.55%;
2), control Cr, Mn, Ti element content: wherein control Cr < 0.03%, Mn < 0.04%, Ti < 0.03%, other impurity element monomer content < 0.03%, impurity summation < 0.10%;
3) cast structure of, refinement casting rod so that it is grain fineness number < 2 grades;
4), use Al-Ti-B refinement cast structure;
5), the pure degree of P improved in casting rod, control H < 0.18ml/100gAl, the content < content < 50% of more than 5%, 5 ��m that oxide inclusion granularity is more than 10 ��m.
2. the method for raising electric conductivity of Al-Mg-Si alloy according to claim 1, it is characterised in that: the Mg+Si < 0.9% in described step 1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310747442.8A CN103757503B (en) | 2013-12-31 | 2013-12-31 | A kind of method improving electric conductivity of Al-Mg-Si alloy |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310747442.8A CN103757503B (en) | 2013-12-31 | 2013-12-31 | A kind of method improving electric conductivity of Al-Mg-Si alloy |
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| Publication Number | Publication Date |
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| CN103757503A CN103757503A (en) | 2014-04-30 |
| CN103757503B true CN103757503B (en) | 2016-06-01 |
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| CN201310747442.8A Expired - Fee Related CN103757503B (en) | 2013-12-31 | 2013-12-31 | A kind of method improving electric conductivity of Al-Mg-Si alloy |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1183568A (en) * | 1965-10-14 | 1970-03-11 | Olin Mathieson | Heat-Treatment of Aluminium-Magnesium-Silicon Alloys |
| CN101956103A (en) * | 2010-10-20 | 2011-01-26 | 云南铝业股份有限公司 | High strength alloy round aluminium rod and production method thereof |
| CN103305713A (en) * | 2013-06-19 | 2013-09-18 | 中南大学 | Al-Mg-Si alloy refining agent and application |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0832884B2 (en) * | 1989-08-15 | 1996-03-29 | 川崎製鉄株式会社 | Method for producing precursor pitch for general-purpose carbon fiber |
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2013
- 2013-12-31 CN CN201310747442.8A patent/CN103757503B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1183568A (en) * | 1965-10-14 | 1970-03-11 | Olin Mathieson | Heat-Treatment of Aluminium-Magnesium-Silicon Alloys |
| CN101956103A (en) * | 2010-10-20 | 2011-01-26 | 云南铝业股份有限公司 | High strength alloy round aluminium rod and production method thereof |
| CN103305713A (en) * | 2013-06-19 | 2013-09-18 | 中南大学 | Al-Mg-Si alloy refining agent and application |
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| CN103757503A (en) | 2014-04-30 |
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Address after: 454350 Henan province Jiaozuo City Xiu Wu County five Li source village mill Tai Ying Village Jiaozuo Sheng Hao aluminum industry limited company Patentee after: Henan new material Limited by Share Ltd Address before: 454350 Henan province Jiaozuo City Xiu Wu County five Li source village mill Tai Ying Village Jiaozuo Sheng Hao aluminum industry limited company Patentee before: Jiaozuo Shenghao Aluminum Industry Co., Ltd. |
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Denomination of invention: Method for increasing electric conductivity of Al-Mg-Si alloy Effective date of registration: 20181123 Granted publication date: 20160601 Pledgee: Jiaozuo Branch of Luoyang Bank Co., Ltd. Pledgor: Henan new material Limited by Share Ltd Registration number: 2018990001107 |
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