CN106319302A - Al-42Si aluminum alloy with room-temperature compression superplasticity and preparation process thereof - Google Patents
Al-42Si aluminum alloy with room-temperature compression superplasticity and preparation process thereof Download PDFInfo
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- CN106319302A CN106319302A CN201610888176.4A CN201610888176A CN106319302A CN 106319302 A CN106319302 A CN 106319302A CN 201610888176 A CN201610888176 A CN 201610888176A CN 106319302 A CN106319302 A CN 106319302A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/02—Alloys based on aluminium with silicon as the next major constituent
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/002—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working by rapid cooling or quenching; cooling agents used therefor
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/02—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working in inert or controlled atmosphere or vacuum
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
- C22F1/043—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with silicon as the next major constituent
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- Mechanical Engineering (AREA)
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- Crystallography & Structural Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Manufacture Of Alloys Or Alloy Compounds (AREA)
Abstract
The invention discloses an Al-42Si alloy with room-temperature compression superplasticity and a preparation process thereof. According to the aluminum alloy, a non-self-consumption vacuum arc furnace is adopted for melting Al-42Si aluminum alloy ingots in the vacuum environment, aluminum alloy melt is adsorbed into a water-cooling copper mould through a vacuum adsorption casting method to be prepared into a rod-shaped Al-42Si sample with the diameter being 5 mm, and then the Al-42Si sample is subjected to heat treatment. According to preparation of the Al-42Si alloy sample, a proper quantity of Al-42Si aluminum alloy ingots are placed in a copper crucible of the non-self-consumption vacuum arc furnace, then a furnace cavity is vacuumized to 1*10<-4> Pa, the furnace cavity is filled with high-purity argon so that the pressure in the furnace cavity can reach 40 Pa, then the Al-42Si alloy is molten, and the alloy melt is adsorbed into the water-cooling copper mould. According to the heat treatment process of the Al-42Si alloy, the rod-shaped Al-42Si sample is placed in a vacuum heat treatment furnace to be subjected to heat preservation for 6 h at the temperature being 480 DEG C for water quenching, and then furnace cooling is carried out till the room temperature is achieved after heat preservation is carried out for 8 h at the temperature being 240 DEG C. The aluminum-silicon alloy is prepared from, by weight, 42% of Si and the balance Al, the yield strength of the aluminum-silicon alloy is 300 MPa, the hardness of the aluminum-silicon alloy is 39.0 HBW, the electrical resistivity of the aluminum-silicon alloy is 0.083 microohm m, and the aluminum-silicon alloy has room-temperature compression superplasticity.
Description
Technical field
The present invention relates to a kind of room temperature and compress superplastic Al-42Si aluminium alloy and preparation technology thereof.
Background technology
High silicon Al-Si alloy is due to its specific strength and hardness is high, density is little, anti-corrosion and anti-wear performance strong, high-temperature behavior
Well, linear expansion coefficient is little, the capacity of heat transmission is strong, low cost, is engine piston, accurate wear part and the ideal of electronic packing piece
Material.But silumin is thick and show fragility due to primary silicon, causes its machine-shaping property poor, greatly limit
Its commercial Application.Form and the distribution of phase in silumin can be improved by rapid solidification and heat treatment, improve high silicon
The various performances of aluminium alloy.Therefore, rapid solidification and heat treatment linkage method is used to prepare Al-42Si silumin and have important
Meaning.
Summary of the invention
It is an object of the invention to provide a kind of room temperature and compress superplastic Al-42Si aluminium alloy and preparation technology thereof.
It is an object of the invention to be achieved through the following technical solutions: a kind of room temperature is compressed superplastic Al-42Si aluminum and closed
Gold, it is characterised in that comprise the steps: that the Al-42Si aluminium alloy ingots by appropriate puts into the copper earthenware of non-consumable arc furnace
In crucible, then furnace chamber is evacuated down to 1 × 10-4Pa, is filled with high-purity argon gas and makes the pressure within furnace chamber reach 40Pa, then will
Alloy melt is also drawn in water cooled copper mould and prepares a diameter of 5mm, the alloy of a length of 70mm by Al-42Si alloy melting
Rod.Then bar-shaped Al-42Si sample is put into and vacuum heat treatment furnace is incubated at a temperature of 480 DEG C shrend in 6 hours, then exist
After being incubated 8 hours at a temperature of 240 DEG C, furnace cooling is to room temperature.
The product that the present invention makes measures comprcssive strength with universal electrical testing machine respectively, measures with digital brinell hardness tester
Hardness, uses four electrode method measured resistivity.
The chemical composition of Al-42Si silumin of the present invention be 42wt%Si, other be Al, its yield strength is
300MPa, hardness are 39.0HBW, resistivity is 0.083 μ Ω m, have room temperature compression superplasticity.
Detailed description of the invention
Below according to specific embodiment, the invention will be further described:
Embodiment 1
Weigh in the balance and take Al-42Si aluminium alloy ingots 10g, put it in the copper crucible of non-consumable arc furnace, then by stove
Chamber is evacuated down to 1 × 10-4Pa, is filled with high-purity argon gas and makes the pressure within furnace chamber reach 40Pa, then by Al-42Si alloy melting
And alloy melt is drawn in water cooled copper mould prepares a diameter of 5mm, the alloy bar of a length of 70mm.Then by bar-shaped Al-
42Si sample is put into and is incubated shrend in 6 hours in vacuum heat treatment furnace at a temperature of 480 DEG C, is then incubated 8 at a temperature of 240 DEG C little
Time after, furnace cooling is to room temperature.The yield strength of this aluminium alloy is 300MPa, hardness is 39.0HBW, resistivity is 0.083 μ Ω
M, have room temperature compression superplasticity.
Claims (3)
1. a room temperature compresses superplastic Al-42Si aluminium alloy, it is characterised in that: the chemical composition of described aluminium alloy is
42.0wt%Si, other be Al;Comprise the steps: appropriate Al-42Si aluminium alloy ingots is put into non-consumable arc furnace
In copper crucible, then furnace chamber is evacuated down to 1 × 10-4Pa, is filled with high-purity argon gas and makes the pressure within furnace chamber reach 40Pa, then
By Al-42Si alloy melting and alloy melt is drawn in water cooled copper mould prepares a diameter of 5mm, the alloy of a length of 70mm
Rod.
The most bar-shaped Al-42Si sample is put into and vacuum heat treatment furnace is incubated at a temperature of 480 DEG C shrend in 6 hours, then
After being incubated 8 hours at a temperature of 240 DEG C, furnace cooling is to room temperature.
A kind of room temperature the most according to claim 1 compresses superplastic Al-42Si aluminium alloy, it is characterised in that: described aluminum
The yield strength of alloy is 300MPa, hardness is 39.0HBW, resistivity is 0.083 μ Ω m, have room temperature compression superplasticity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610888176.4A CN106319302B (en) | 2016-10-12 | 2016-10-12 | A kind of room temperature compresses superplastic Al-42Si aluminium alloy and its preparation process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610888176.4A CN106319302B (en) | 2016-10-12 | 2016-10-12 | A kind of room temperature compresses superplastic Al-42Si aluminium alloy and its preparation process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106319302A true CN106319302A (en) | 2017-01-11 |
| CN106319302B CN106319302B (en) | 2019-07-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610888176.4A Active CN106319302B (en) | 2016-10-12 | 2016-10-12 | A kind of room temperature compresses superplastic Al-42Si aluminium alloy and its preparation process |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1861820A (en) * | 2006-06-15 | 2006-11-15 | 河北工业大学 | Grain fining agent for casting aluminium alloy, preparation process and application thereof |
| CN102513721A (en) * | 2011-12-22 | 2012-06-27 | 浙江大学 | High-strength aluminum alloy solder for brazing at medium temperature and preparation method thereof |
| CN104762497A (en) * | 2015-05-05 | 2015-07-08 | 湖南理工学院 | Zr-Al-Ni-Cu bulk amorphous alloy series with indoor temperature compressive plasticity and high strength |
-
2016
- 2016-10-12 CN CN201610888176.4A patent/CN106319302B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1861820A (en) * | 2006-06-15 | 2006-11-15 | 河北工业大学 | Grain fining agent for casting aluminium alloy, preparation process and application thereof |
| CN102513721A (en) * | 2011-12-22 | 2012-06-27 | 浙江大学 | High-strength aluminum alloy solder for brazing at medium temperature and preparation method thereof |
| CN104762497A (en) * | 2015-05-05 | 2015-07-08 | 湖南理工学院 | Zr-Al-Ni-Cu bulk amorphous alloy series with indoor temperature compressive plasticity and high strength |
Non-Patent Citations (2)
| Title |
|---|
| 李浩: ""喷射成形Al-Si系高硅铝合金组织与性能的研究"", 《中国优秀硕士学位论文全文数据库 工程科技Ⅰ辑》 * |
| 章立钢等: "《稀土Al-Cu合金相图及应用》", 31 October 2015, 中南大学出版社 * |
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| CN106319302B (en) | 2019-07-02 |
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