CN105039809A - Chromium-bearing Al-Mg-Si aluminum alloy and preparing technology thereof - Google Patents
Chromium-bearing Al-Mg-Si aluminum alloy and preparing technology thereof Download PDFInfo
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- CN105039809A CN105039809A CN201510565094.1A CN201510565094A CN105039809A CN 105039809 A CN105039809 A CN 105039809A CN 201510565094 A CN201510565094 A CN 201510565094A CN 105039809 A CN105039809 A CN 105039809A
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Abstract
The invention discloses a chromium-bearing Al-Mg-Si aluminum alloy and a preparing technology thereof. The content of the main elements of Mg, Cu and Si of the alloy is the same as those of 6463 alloy; the content of the element Cr is changed; and the function of the element Cr in the homogenization process is mainly studied. Intermediate alloy with 99.99 weight percent of high-purity aluminum, 99.99 weight percent of high-purity copper, 99.97 weight percent of industrial pure magnesium, 20 percent of aluminum-silicate and 5 percent of aluminum-chromium is adopted as the alloy. According to the nominal composition of the alloy, three kinds of alloy with the content of the element Cr being 0.1 percent, 0.2 percent and 0.3 percent is prepared. A medium-frequency induction furnace is used for smelting the alloy; zinc oxide is used as a covering agent; hexachloroethane is used for degassing and refining; the casting temperature is 720 DEG C; and a round bar with the diameter of 38.5 mm and the length of 25 mm in size is molded. The tensile strength of the alloy is 187.4-232.8 MPa; the hardness of the alloy is 40.8-57.6 HBW; and the electric resistivity of the alloy is 0.17-0.25 ohmm.
Description
Technical field
The present invention relates to a kind of containing chromium Al-Mg-Si aluminium alloy and preparation technology thereof.
Background technology
Chromium is Addition ofelements common in Al-Mg system alloy.When 600 DEG C, chromium solubleness in aluminium is 0.8%, does not substantially dissolve lower than 600 DEG C.Chromium forms the intermetallic compounds such as (CrFe) Al7 and (CrMn) Al12 in aluminium, and hinder the nucleation and growth process of recrystallize, alloy has certain strengthening effect, can also improve alloy ductility and reduce stress corrosion opening cracking maleate sensitivity.But meeting-place increases quenching sensitive, anode oxide film is made to be yellow.The addition of chromium in aluminium alloy is generally no more than 0.35%, and reduces with the increase of transition element in alloy.So the difference of Cr constituent content inherently has an impact to the structure and properties of aluminium alloy in aluminium alloy.
Summary of the invention
The object of the present invention is to provide a kind of containing chromium Al-Mg-Si aluminium alloy and preparation technology thereof.
The object of the invention is to be achieved through the following technical solutions: alloy adopts the master alloy of raffinal (99.99wt%), high-purity copper (99.99wt%), pure magnesium (99.97wt%) and aluminium silicon (20%), aluminium chromium (5%), is three kinds of alloys of 0.1%, 0.2% and 0.3% by alloy nominal composition preparation Cr constituent content.Molten alloy uses medium-frequency induction furnace, and insulating covering agent is zinc oxide, and uses hexachloroethane refinery by de-gassing, pouring temperature: 720 DEG C, compact dimensions: φ 38.5mm, the pole of long 25mm.Under 525 DEG C, 550 DEG C and 575 DEG C of temperature, be incubated 4h, 6h and 8h respectively carry out homogenizing annealing.
The product that the present invention makes uses X-ray diffractometer (XRD) and energy spectrometer (EDS) to detect the kind of phase respectively, with scanning electronic microscope (SEM) tissues observed pattern, size and distribution, tensile strength and yield strength is measured with universal electrical trier, measure hardness with digital brinell hardness tester, use four electrode method measured resistivity.
The chemical composition of iron content silumin of the present invention is 0.10-0.30Wt%Cr, 0.38-0.41Wt%Si, 0.02-0.04Wt%Fe, 0.20-0.22Wt%Cu, 0.66-0.69Wt%Mg, other is Al.Its tensile strength is 187.4-232.8MPa, hardness is 40.8-57.6HBW, resistivity is 0.17-0.25 Ω m.
Embodiment
According to specific embodiment, the invention will be further described below:
Embodiment 1
Alloy adopts the master alloy of raffinal (99.99wt%), high-purity copper (99.99wt%), pure magnesium (99.97wt%) and aluminium silicon (20%), aluminium chromium (5%), and be 0.1% alloy by alloy nominal composition preparation Cr constituent content, label is 1#.Molten alloy uses medium-frequency induction furnace, and insulating covering agent is zinc oxide, and uses hexachloroethane refinery by de-gassing, and pouring temperature is 720 DEG C, and compact dimensions is the pole of the long 25mm of φ 38.5mm.Homogenization temperature is respectively 525 DEG C, and soaking time is 2h air cooling.Its tensile strength is 187.4MPa, hardness is 40.8HBW, resistivity is 0.17 Ω m.
Embodiment 2
Alloy adopts the master alloy of raffinal (99.99wt%), high-purity copper (99.99wt%), pure magnesium (99.97wt%) and aluminium silicon (20%), aluminium chromium (5%), and be 0.2% alloy by alloy nominal composition preparation Cr constituent content, label is 2#.Molten alloy uses medium-frequency induction furnace, and insulating covering agent is zinc oxide, and uses hexachloroethane refinery by de-gassing, and pouring temperature is 720 DEG C, and compact dimensions is the pole of the long 25mm of φ 38.5mm.Homogenization temperature is respectively 550 DEG C, and soaking time is 2h air cooling.Its tensile strength is 213.6MPa, hardness is 55.1HBW, resistivity is 0.19 Ω m.
Embodiment 3
Alloy adopts the master alloy of raffinal (99.99wt%), high-purity copper (99.99wt%), pure magnesium (99.97wt%) and aluminium silicon (20%), aluminium chromium (5%), is the alloy of 0.3% by alloy nominal composition preparation Cr constituent content, label 3#.Molten alloy uses medium-frequency induction furnace, and insulating covering agent is zinc oxide, and uses hexachloroethane refinery by de-gassing, and pouring temperature is 720 DEG C, and compact dimensions is the pole of the long 25mm of φ 38.5mm.Homogenization temperature is respectively 500 DEG C, 525 DEG C, 550 DEG C and 575 DEG C, and soaking time is 2h air cooling.Its tensile strength is 232.8MPa, hardness is 57.6HBW, resistivity is 0.25 Ω m.
Claims (3)
1. containing a chromium Al-Mg-Si aluminium alloy, it is characterized in that: the chemical composition of described silumin is 0.10-0.30Wt%Cr, 0.38-0.41Wt%Si, 0.02-0.04Wt%Fe, 0.20-0.22Wt%Cu, 0.66-0.69Wt%Mg, other is Al.
2. described in claim 1, contain the preparation technology of chromium Al-Mg-Si aluminium alloy, it is characterized in that, comprising the steps: that alloy adopts the master alloy of raffinal (99.99wt%), high-purity copper (99.99wt%), pure magnesium (99.97wt%) and aluminium silicon (20%), aluminium chromium (5%), is four kinds of alloys of 0.1%, 0.2% and 0.3% by alloy nominal composition preparation Cr constituent content; Molten alloy uses medium-frequency induction furnace, and insulating covering agent is zinc oxide, and uses hexachloroethane refinery by de-gassing, pouring temperature: 720 DEG C, compact dimensions: φ 38.5mm, the pole of long 25mm; Under 525 DEG C, 550 DEG C and 575 DEG C of temperature, be incubated 4h, 6h and 8h respectively carry out homogenizing annealing.
3. the tensile strength containing chromium Al-Mg-Si aluminium alloy described in claim 1 is 187.4-232.8MPa, hardness is 40.8-57.6HBW, resistivity is 0.17-0.25 Ω m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510565094.1A CN105039809A (en) | 2015-09-08 | 2015-09-08 | Chromium-bearing Al-Mg-Si aluminum alloy and preparing technology thereof |
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| CN201510565094.1A CN105039809A (en) | 2015-09-08 | 2015-09-08 | Chromium-bearing Al-Mg-Si aluminum alloy and preparing technology thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11203801B2 (en) | 2019-03-13 | 2021-12-21 | Novelis Inc. | Age-hardenable and highly formable aluminum alloys and methods of making the same |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6565679B1 (en) * | 1998-03-20 | 2003-05-20 | Alcan International Limited | Extrudable aluminum alloys |
| CN102776425A (en) * | 2011-05-12 | 2012-11-14 | 张家港市金邦铝业有限公司 | Aluminum alloy |
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2015
- 2015-09-08 CN CN201510565094.1A patent/CN105039809A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6565679B1 (en) * | 1998-03-20 | 2003-05-20 | Alcan International Limited | Extrudable aluminum alloys |
| CN102776425A (en) * | 2011-05-12 | 2012-11-14 | 张家港市金邦铝业有限公司 | Aluminum alloy |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11203801B2 (en) | 2019-03-13 | 2021-12-21 | Novelis Inc. | Age-hardenable and highly formable aluminum alloys and methods of making the same |
| US11932924B2 (en) | 2019-03-13 | 2024-03-19 | Novelis, Inc. | Age-hardenable and highly formable aluminum alloys and methods of making the same |
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Application publication date: 20151111 |