CN107641778B - A kind of almag heat treatment process - Google Patents
A kind of almag heat treatment process Download PDFInfo
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- CN107641778B CN107641778B CN201711003371.5A CN201711003371A CN107641778B CN 107641778 B CN107641778 B CN 107641778B CN 201711003371 A CN201711003371 A CN 201711003371A CN 107641778 B CN107641778 B CN 107641778B
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Abstract
The present invention relates to a kind of almag heat treatment process to enhance the mechanical property of almag by the optimization to solution treatment in heat treatment process and the temperature and time of ageing treatment, obtains ideal tensile strength and hardness；The component of almag is optimized by the way that Sc, Ti, rare earth Gd and Y is added, to refine the crystallite dimension of cast alloy in almag process of setting, dispersion-strengthened action is generated, inhibits alloy recrystallization process.Also, anodized is carried out to almag using oxalic acid anodizing technique, shuffles the corrosion potential of alloy, corrosion electric current density is substantially reduced, and film resistance increases, and effectively prevents electrochemical corrosion.
Description
Technical field
The present invention relates to metal heat treatmet fields, in particular to a kind of almag heat treatment process.
Background technique
Since the 1990s, auto industry production material just has a degree of improvement, has environment-friendly function
Lightweight material be gradually applied in automobile production.Aluminium, U.S. alloy material light weight, performance is good, the blueness by auto industry
It looks at.During producing components, bumper, hood, the body panel etc. of automobile are all with Al alloys andMg alloys material system
It makes, the quality of both synthetic materials is lighter, can reduce the quality of components using this material, to mitigate whole
The weight of automobile improves the security performance of automobile.Some piths in some developed countries, automobile also all using aluminium,
Magnesium alloy is made.Alloy material quality compared with simple aluminium, magnesium material is lighter, and intensity is bigger.With production technology into
Step, the application range of Al alloys andMg alloys material also expanding, and chair framework, clutch, operation pole support in automobile etc. are also gradually
Using this kind of material.The superperformance of material needs to come out using advanced heat treatment technics competence exertion, therefore, closes in magnalium
In the production process of gold, investment of the Ying Jia great in almag heat treatment and processing technology, by the performance and production of material
Technology adequately combines, and can just produce the auto parts of better quality in this way.
Summary of the invention
In order to solve the problems, such as to improve almag mechanical property and corrosion resistance, the present invention provides a kind of almags
Heat treatment process enables almag to obtain enough intensity and hardness and good corrosion resistance.
A kind of almag heat treatment process includes α-Al matrix and β-Al in the almag2Mg3Zn3Phase, it is described
Heat treatment process includes the solution treatment successively carried out and artificial aging step；In the solutionizing step, first by the aluminium
Magnesium alloy is in 460~490 DEG C of 4~10h of heat preservation, then in 530~580 DEG C of 6~8h of heat preservation；In the artificial aging step, first will
The almag is in 180~200 DEG C of 2~4h of heat preservation, then in 250~270 DEG C of 8~12h of heat preservation.
The almag is by a variety of 99.95% pure metal raw materials and Al-Mg intermediate alloy in electromagnetism intermediate frequency furnace
It smelts, refining temperature is 750~800 DEG C, it casts after cooling to 700~720 DEG C with the furnace, a variety of pure metal raw material packets
Include pure metal Al, Mg, Zn and Cu.
Almag after the heat treatment is subjected to anodized, first sanding and polishing immerses after washing and contains carbon
Sour sodium, tertiary sodium phosphate aqueous solution in degrease 10~20min, then nitration mixture handles 10~20min, is rinsed with deionized water dry
Only, it is put into progress 30~60min of anodic oxidation in oxidation trough, voltage is 10~15V, and current density is 1.0~1.5A/cm2。
The Mg, 1.00%~1.50% Cu, 0.50% that the ingredient of the almag is 5.20%~5.50%~
1.50% Zn, 0.05%~0.20% Sc, 0.05%~0.10% Ti, 0.05%~0.10% Gd, 0.03%~
0.05% Y, surplus are aluminium and inevitable impurity.
The tensile strength of the almag is 220~250MPa, and Vickers hardness is 100~110HV.
The present invention enhances aluminium by the optimization to solution treatment in heat treatment process and the temperature and time of ageing treatment
The mechanical property of magnesium alloy obtains ideal tensile strength and hardness；By the way that Sc, Ti and rare earth Gd, Y is added to magnalium
The component of alloy is optimized, to refine the crystallite dimension of cast alloy in almag process of setting, generates more
Invigoration effect is dissipated, alloy recrystallization process is inhibited.Also, anodic oxidation is carried out to almag using oxalic acid anodizing technique
Processing, shuffles the corrosion potential of alloy, and corrosion electric current density is substantially reduced, and film resistance increases, and effectively prevents electrochemistry
Corrosion.
Specific embodiment
Below with reference to embodiment and comparative example, the present invention is described in more detail.
Embodiment 1:
A kind of almag heat treatment process includes α-Al matrix and β-Al in the almag2Mg3Zn3Phase, it is described
Heat treatment process includes the solution treatment successively carried out and artificial aging step；In the solutionizing step, first by the aluminium
Magnesium alloy is in 460 DEG C of heat preservation 4h, then in 580 DEG C of heat preservation 8h；In the artificial aging step, first by the almag 180
DEG C heat preservation 2h, then in 270 DEG C of heat preservation 12h.The almag is by a variety of 99.95% pure metal raw materials and Al-Mg intermediate alloy
It is smelted in electromagnetism intermediate frequency furnace, refining temperature is 750 DEG C, it casts after cooling to 700 DEG C with the furnace, a variety of proof gold
Belonging to raw material includes pure metal Al, Mg, Zn and Cu.Almag after the heat treatment is subjected to anodized, is first polished
Polishing, immersed after washing containing sodium carbonate, tertiary sodium phosphate aqueous solution in degrease 10min, then nitration mixture handles 10min, uses
Deionized water rinsed clean is put into progress anodic oxidation 30min, voltage 10V, current density 1.0A/cm in oxidation trough2。
Mg, 1.00% Cu, 0.50% Zn, 0.05% Sc, 0.05% Ti that the ingredient of the almag is 5.20%,
0.05% Gd, 0.03% Y, surplus are aluminium and inevitable impurity.The tensile strength of the almag is 220MPa,
Vickers hardness is 100HV.
Embodiment 2:
A kind of almag heat treatment process includes α-Al matrix and β-Al in the almag2Mg3Zn3Phase, it is described
Heat treatment process includes the solution treatment successively carried out and artificial aging step；In the solutionizing step, first by the aluminium
Magnesium alloy is in 490 DEG C of heat preservation 6h, then in 530 DEG C of heat preservation 6h；In the artificial aging step, first by the almag 200
DEG C heat preservation 3h, then in 250 DEG C of heat preservation 8h.The almag is existed by a variety of 99.95% pure metal raw materials and Al-Mg intermediate alloy
It is smelted in electromagnetism intermediate frequency furnace, refining temperature is 780 DEG C, it casts after cooling to 710 DEG C with the furnace, a variety of pure metal
Raw material includes pure metal Al, Mg, Zn and Cu.Almag after the heat treatment is subjected to anodized, first polishing is thrown
Light, immersed after washing containing sodium carbonate, tertiary sodium phosphate aqueous solution in degrease 15min, then nitration mixture handles 15min, spends
Ionized water rinsed clean is put into progress anodic oxidation 40min, voltage 12V, current density 1.3A/cm in oxidation trough2.Institute
Mg, 1.50% Cu, 1.50% Zn, 0.20% Sc, 0.10% Ti that the ingredient of almag is 5.50% are stated,
0.10% Gd, 0.05% Y, surplus are aluminium and inevitable impurity.The tensile strength of the almag is 250MPa,
Vickers hardness is 110HV.
Embodiment 3:
A kind of almag heat treatment process includes α-Al matrix and β-Al in the almag2Mg3Zn3Phase, it is described
Heat treatment process includes the solution treatment successively carried out and artificial aging step；In the solutionizing step, first by the aluminium
Magnesium alloy is in 470 DEG C of heat preservation 10h, then in 560 DEG C of heat preservation 7h；In the artificial aging step, first by the almag 190
DEG C heat preservation 4h, then in 260 DEG C of heat preservation 10h.The almag is by a variety of 99.95% pure metal raw materials and Al-Mg intermediate alloy
It is smelted in electromagnetism intermediate frequency furnace, refining temperature is 800 DEG C, it casts after cooling to 720 DEG C with the furnace, a variety of proof gold
Belonging to raw material includes pure metal Al, Mg, Zn and Cu.Almag after the heat treatment is subjected to anodized, is first polished
Polishing, immersed after washing containing sodium carbonate, tertiary sodium phosphate aqueous solution in degrease 20min, then nitration mixture handles 20min, uses
Deionized water rinsed clean is put into progress anodic oxidation 60min, voltage 15V, current density 1.5A/cm in oxidation trough2。
Mg, 1.30% Cu, 1.00% Zn, 0.10% Sc, 0.08% Ti that the ingredient of the almag is 5.40%,
0.06% Gd, 0.04% Y, surplus are aluminium and inevitable impurity.The tensile strength of the almag is 240MPa,
Vickers hardness is 110HV.
Comparative example 1:
Using the heat treatment process being different from the present invention, when in particular by other solution treatment and artificial aging step,
It is too high or too low for temperature due to heat treatment, or fail successively to be dissolved twice and ageing treatment, to will appear lattice
The defects of distortion, causes its almag product tensile strength effect of optimization obtained unobvious, and tensile strength is only
200MPa or less.
Comparative example 2:
Using the almag for being different from alloying component of the invention, the effect element of crystal grain is refined due to lacking, then is tied
Brilliant process cannot effectively inhibit, so that hardness, the strong plasticity of the almag obtained be made all to be difficult to ensure that tensile strength is only
200MPa is hereinafter, Vickers hardness is only 90HV or so.
Comparative example 3:
If not using anodized of the invention, almag surface oxidation film easy to form, hardness and anti-corrosion
Property is all unable to reach required performance requirement.
The present invention is by solution treatment in heat treatment process and timeliness it can be seen from embodiment 1-3 and comparative example 1-3
The optimization of the temperature and time of processing enhances the mechanical property of almag, obtains ideal tensile strength and hardness；It is logical
It crosses addition Sc, Ti, rare earth Gd and Y the component of almag is optimized, thus in almag process of setting
The crystallite dimension of cast alloy has been refined, dispersion-strengthened action is generated, has inhibited alloy recrystallization process.Also, use oxalic acid sun
Pole oxidation technology carries out anodized to almag, shuffles the corrosion potential of alloy, corrosion electric current density is obvious
It reduces, film resistance increases, and effectively prevents electrochemical corrosion.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that: not
A variety of change, modification, replacement and modification can be carried out to these embodiments in the case where being detached from the principle of the present invention and objective, this
The range of invention is defined by the claims and their equivalents.
Claims (5)
1. a kind of almag heat treatment process, which is characterized in that include α-Al matrix and β-in the almag
Al2Mg3Zn3Phase, the heat treatment process include the solution treatment successively carried out and artificial aging step；The solution treatment step
In rapid, first by the almag in 460 ~ 490 DEG C of 4 ~ 10h of heat preservation, then in 530 ~ 580 DEG C of 6 ~ 8h of heat preservation；The artificial aging
In step, first by the almag in 180 ~ 200 DEG C of 2 ~ 4h of heat preservation, then in 250 ~ 270 DEG C of 8 ~ 12h of heat preservation；
The Mg, 1.00%~1.50% Cu, 0.50%~1.50% that the ingredient of the almag is 5.20%~5.50%
Zn, 0.05%~0.20% Sc, 0.05%~0.10% Ti, 0.05%~0.10% Gd, 0.03%~0.05%
Y, surplus be aluminium and inevitable impurity.
2. heat treatment process according to claim 1, it is characterised in that: the almag is by a variety of 99.95% pure metal
Raw material and Al-Mg intermediate alloy are smelted in electromagnetism intermediate frequency furnace, and refining temperature is 750 ~ 800 DEG C, are cooled to the furnace
It casts after 700 ~ 720 DEG C, a variety of pure metal raw materials include pure metal Al, Mg, Zn and Cu.
3. heat treatment process according to claim 1, it is characterised in that: the almag after the heat treatment is carried out sun
Pole oxidation processes, first sanding and polishing, immersed after washing containing sodium carbonate, tertiary sodium phosphate aqueous solution in degrease 10 ~ 20min,
Then nitration mixture handles 10 ~ 20min, with deionized water rinsed clean, is put into progress 30 ~ 60min of anodic oxidation, voltage in oxidation trough
For 10 ~ 15V, current density is 1.0 ~ 1.5A/cm2。
4. heat treatment process according to any one of claims 1 to 3, it is characterised in that: the tension of the almag is strong
Degree is 220 ~ 250MPa.
5. heat treatment process according to any one of claims 1 to 3, it is characterised in that: the Vickers of the almag is hard
Degree is 100 ~ 110HV.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH04371540A (en) * | 1991-06-18 | 1992-12-24 | Furukawa Alum Co Ltd | Clad aluminum alloy material for low temperature brazing |
| JPH0525574A (en) * | 1991-07-22 | 1993-02-02 | Furukawa Alum Co Ltd | High strength aluminum alloy clad material for high temperature forming |
| CN101831577A (en) * | 2010-05-14 | 2010-09-15 | 常州华晨铸造有限公司 | Aluminum magnesium alloy |
| CN105839036B (en) * | 2016-04-27 | 2017-10-27 | 贵州航天风华精密设备有限公司 | A kind of heat treatment method of almag |
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