CN108774696A - A kind of ultra-thin pipe extrudate production technology of 6 line aluminium alloys - Google Patents
A kind of ultra-thin pipe extrudate production technology of 6 line aluminium alloys Download PDFInfo
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- CN108774696A CN108774696A CN201810640608.9A CN201810640608A CN108774696A CN 108774696 A CN108774696 A CN 108774696A CN 201810640608 A CN201810640608 A CN 201810640608A CN 108774696 A CN108774696 A CN 108774696A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/026—Alloys based on aluminium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/02—Making uncoated products
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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
- C22F1/02—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
-
- 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
Abstract
The invention belongs to aluminium alloy production technical fields,It is related to a kind of ultra-thin pipe extrudate production technology of 6 line aluminium alloys,Aluminium alloy stock is Si 1.35~1.45%,Fe 0.21%,Cu 0.05%,Mn 0.44~0.48%,Mg 0.50~0.55%,Cr 0.09%,Zn 0.05%,Ti 0.02%,Remaining single impurity≤0.05%,Impurity total≤0.15%,Surplus Al,By aluminium alloy cast ingot made from the formula by squeezing,Online water spray quenching processing,Artificial aging is carried out after tension straingtening,The institution of prescription of artificial aging is 145 ± 5 DEG C × 11h,Change existing quenching mode and institution of prescription,So that the Al Alloy Super pipe size and mechanical property that finally prepare can reach requirement prepared by production,And aluminum alloy round tube wall is thin,Elongation after fracture is greatly improved.
Description
Technical field
The invention belongs to aluminium alloy production technical fields, are related to a kind of ultra-thin pipe extrudate production work of 6 line aluminium alloys
Skill.
Background technology
Suitable other elements are exactly added in so-called aluminium alloy in commercial-purity aluminium, and the essence of aluminium is made to be improved, with full
The industrial various needs in life of foot.Since aluminium alloy proportion is small, specific strength is high, has good comprehensive performance, therefore,
It is widely used in aircraft industry, auto manufacturing, power instrument, tool and the manufacture of civilian vessel etc..
In the research and development and production process of aluminium alloy, need to analyze the chemical composition in aluminium alloy, to reach
The purpose of each chemical composition content is strictly controlled, and then stokehold ingredient is out of control during avoiding alloy production, while ensureing alloy
The quality of product.6082 aluminium alloys belong to 6 ××× series alloy aluminium sheets, are that can be heat-treated the aluminum alloy plate materials that can strengthen,
With moderate strength and good welding performance, corrosion resistance, it is mainly used for communications and transportation and Structural Engineering industry.It is existing simultaneously
6082 aluminium alloys in technology have higher quenching sensitive, usually select water hardening, and peak value timeliness.6082 aluminium close
Content of magnesium is also higher in gold, and the surface quality of proximate matter can be influenced when content of magnesium is high.
But 6082 aluminium alloys belong to Al-Mg-Si systems wrought aluminium alloy, the 6082 alloys feelings too thin in extrudate wall thickness
Under condition, original quenching mode and institution of prescription cannot meet the requirement of Al Alloy Super pipe size and mechanical property, often occur
The low phenomenon of proximate matter elongation after fracture after timeliness.
Invention content
In view of this, the present invention cannot meet Al Alloy Super pipe to solve existing quenching mode and institution of prescription
The problem of size and mechanical property requirements, provides a kind of 6 line aluminium alloys ultra-thin pipe extrudate production technology.
In order to achieve the above objectives, the present invention provides a kind of 6 line aluminium alloys ultra-thin pipe extrudate production technology, including such as
Lower step：
A, aluminium alloy stock is prepared according to following weight part ratio：Si 1.35~1.45%, Fe 0.21%, Cu
0.05%, Mn 0.44~0.48%, Mg 0.50~0.55%, Cr 0.09%, Zn 0.05%, Ti 0.02%, remaining is single
Impurity≤0.05%, impurity total≤0.15%, prepared aluminium alloy stock is added in smelting furnace and uniformly mixes by surplus Al
Melting is liquid aluminium alloy after conjunction, is aluminium alloy cast ingot by liquid aluminium alloy founding；
B, aluminium alloy cast ingot made from step A being subjected to Homogenization Treatments, the temperature of Homogenization Treatments is 450~500 DEG C,
Soaking time is 10~20h；
C, the aluminium alloy cast ingot after step B Homogenization Treatments is placed in extruder and is squeezed, obtain required aluminium
Alloy profile, wherein extrusion die use single hole extrusion die, and before extruding, the heating temperature of extrusion die is 480~500 DEG C,
The heating temperature for squeezing ingot casting is 510~530 DEG C, and the cylinder temperature of extrusion cylinder is 420~440 DEG C, and the extrusion ratio of extrusion cylinder is
48.8, the extrusion speed in extrusion process is 4.5~6m/min；
D, the aluminium alloy extrusions after squeezing step C carries out online water spray quenching processing in extrusion die exit, ensures
The size of aluminium alloy extrusions, in order to ensure that quenching intensity, aluminium alloy extrusions go out quenching area temperature and answer≤180 DEG C；
E, the quenched aluminium alloy extrusions of step D is subjected to tension straingtening through drawing straightener, by the aluminium after tension straingtening
Alloy profile parks scale sawing after 2h；
F, the aluminium alloy extrusions after step E tension straingtenings being subjected to artificial aging, institution of prescription is 145 ± 5 DEG C × 11h,
Obtain Al Alloy Super pipe proximate matter.
Further, in step A aluminium alloy smelting process be melt, stir, skimming, degasification removal of impurities, filtering, casting partly connect
Continuous casting method.
Further, the temperature control of step A smelting furnaces is refined at 700~750 DEG C, and using refining agent.
Further, extruder is 75MN aluminium extruding machines, a diameter of 300mm of extrusion cylinder in step C.
Further, the temperature in step D after aluminum alloy section quenching is 20~30 DEG C.
Further, the quenching cooling velocity of aluminium alloy extrusions is 50~80 DEG C/min in step D.
Further, the amount of tension of aluminium alloy extrusions controls within 1% in step E.
Further, step F institutions of prescription are to keep the temperature 11h after aluminium alloy extrusions reaches furnace temperature.
Further, the Al Alloy Super pipe proximate matter thickness prepared in step F is 1.60~1.65mm.
The beneficial effects of the present invention are：
1, the formula of aluminium alloy stock of the present invention is adjusted relative to 6082 aluminium alloy stock formulas, because Si can be with
The defects of intensity and hardness of raising aluminium alloy, Mg belongs to easy binding metal, can lead to aluminium shape surface plucking.Therefore selection silicon
Content is higher, the lower aluminium alloy cast ingot of Mg contents, by improving the content of element silicon, reduces Mg contents to improve aluminium section bar table
Face quality simultaneously ensures aluminum profile strength.
2, original water hardening mode is changed to water spray quenching by the present invention.Using water spray quenching, it can ensure aluminium alloy
The size of proximate matter.According to the principle expanded with heat and contract with cold, water spray quenching proximate matter cooling velocity is slow compared with water hardening, and deformation extent is small, it
Coordinate aluminium section bar tension straingtening to desired size again afterwards, the aluminium alloy extrusions being prepared is less likely to occur to crack, sticks up skin phenomenon,
The harmful effect that this water mist mode brings aluminium section bar mechanical property (i.e. elongation after fracture reduces), we pass through institution of prescription
Selection make up.
3, original 175 ± 5 DEG C × 7h of institution of prescription is changed to 145 ± 5 DEG C × 11h by the present invention.Institution of prescription is in this way
When lack time effect, the second phase amount is less, smaller to the obstruction of dislocation, and caused dislocation is tangled relatively gently, therefore processing setting rate
Relatively slow, elongation is higher, can make up the problem that elongation after fracture is low caused by the reduction of quenching intensity and alloying component,
Therefore after extrusion process stabilization, by test of many times, determine that institution of prescription is 145 ± 5 DEG C × 11h.
Specific implementation mode
The preferred embodiment of the present invention will be described in detail below.
Embodiment 1
A kind of ultra-thin pipe extrudate production technology of 6 line aluminium alloys, includes the following steps：
A, it calculates each aluminium alloy stock dosage and prepares aluminium alloy stock according to the ratio, 6 line aluminium alloy raw material each element quality
Percentage proportioning is as follows：
It is liquid aluminium alloy that prepared aluminium alloy stock, which is added in smelting furnace melting after evenly mixing, by liquid aluminium
Alloy casting is aluminium alloy cast ingot, and wherein aluminium alloy smelting process is to melt, stir, skimming, degasification removal of impurities, filtering, casting
The temperature control of semi-continuous casting method, smelting furnace is refined at 750 DEG C, and using refining agent；
B, aluminium alloy cast ingot made from step A is subjected to Homogenization Treatments, the temperature of Homogenization Treatments is 450 DEG C, heat preservation
Time is 20h；
C, the aluminium alloy cast ingot after step B Homogenization Treatments is placed in extruder and is squeezed, obtain required aluminium
Alloy profile, wherein extruder be 75MN aluminium extruding machines, a diameter of 300mm of extrusion cylinder, extrusion die use single hole extrusion die,
Before extruding, the heating temperature of extrusion die is 480 DEG C, and the heating temperature for squeezing ingot casting is 510 DEG C, and the cylinder temperature of extrusion cylinder is
440 DEG C, the extrusion ratio of extrusion cylinder is 48.8, and the extrusion speed in extrusion process is 4.5m/min；
D, the aluminium alloy extrusions after squeezing step C carries out online water spray quenching processing in extrusion die exit, ensures
The size of aluminium alloy extrusions, in order to ensure quenching intensity, it is 150 DEG C that aluminium alloy extrusions, which goes out quenching area temperature, and aluminium alloy extrusions is quenched
Temperature after fire is 30 DEG C, and the quenching cooling velocity of aluminium alloy extrusions is 50 DEG C/min；
E, the quenched aluminium alloy extrusions of step D is subjected to tension straingtening through drawing straightener, by the aluminium after tension straingtening
Alloy profile parks scale sawing after 2h, and the wherein amount of tension of aluminium alloy extrusions controls within 1%；
F, the aluminium alloy extrusions after step E tension straingtenings being subjected to artificial aging, institution of prescription is 145 ± 5 DEG C × 11h,
Institution of prescription is to keep the temperature 11h after aluminium alloy extrusions reaches furnace temperature, obtains Al Alloy Super pipe proximate matter, Al Alloy Super tubular type
Material thickness is 1.63mm.
Embodiment 2
Difference lies in 6 line aluminium alloy raw material each element mass percents in step A with such as with embodiment 1 for embodiment 2
Under：
Embodiment 3
Embodiment 3 is 500 DEG C difference lies in the temperature of Homogenization Treatments in step B with embodiment 1, and soaking time is
10h。
Embodiment 4
Embodiment 4 is 500 DEG C difference lies in the heating temperature of extrusion die in step C with embodiment 1, squeezes ingot casting
Heating temperature is 530 DEG C, and the cylinder temperature of extrusion cylinder is 420 DEG C, and the extrusion speed in extrusion process is 6m/min.
Embodiment 5
Embodiment 5 is 20 DEG C difference lies in the temperature after aluminum alloy section quenching in step D with embodiment 1, aluminium alloy
The quenching cooling velocity of proximate matter is 80 DEG C/min.
Comparative example
Difference lies in 6 line aluminium alloy raw material each element mass percents in step A with such as with embodiment 1 for comparative example
Under：
The aluminium alloy extrusions after tension straingtening is subjected to artificial aging in step F, institution of prescription is 175 ± 5 DEG C × 7h.
According to《GB-T 228-2002 metal material tensile testing at ambient temperature》Made from Examples 1 to 5 and comparative example
Aluminum alloy round pipe profile carries out tension test, measures the test of yield strength, tensile strength and elongation percentage, the test of hardness is logical
Webster hardness instrument test is crossed to obtain.
Table one：
| Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | Comparative example | |
| Yield strength (Mpa) | 285 | 288 | 283 | 291 | 287 | 303 |
| Tensile strength (Mpa) | 331 | 334 | 329 | 337 | 335 | 326 |
| Elongation percentage (%) | 12.5 | 12.8 | 12.7 | 13.0 | 13.2 | 6.5 |
It can see by table one, the aluminium alloy of the ultra-thin pipe extrudate production technology production of 6 line aluminium alloys of the invention
For ultra-thin pipe extrudate in the case where meeting proximate matter performance requirement, aluminium section bar elongation after fracture improves 6.5 compared with comparative example
The percentage point of left and right.
Finally illustrate, preferred embodiment above is merely illustrative of the technical solution of the present invention and unrestricted, although logical
It crosses above preferred embodiment the present invention is described in detail, however, those skilled in the art should understand that, can be
Various changes are made to it in form and in details, without departing from claims of the present invention limited range.
Claims (9)
1. a kind of ultra-thin pipe extrudate production technology of 6 line aluminium alloys, which is characterized in that include the following steps：
A, aluminium alloy stock is prepared according to following weight part ratio：Si 1.35~1.45%, Fe 0.21%, Cu 0.05%, Mn
0.44~0.48%, Mg 0.50~0.55%, Cr 0.09%, Zn 0.05%, Ti 0.02%, remaining single impurity≤
0.05%, impurity total≤0.15%, prepared aluminium alloy stock is added in smelting furnace and melts after evenly mixing by surplus Al
Refining is liquid aluminium alloy, is aluminium alloy cast ingot by liquid aluminium alloy founding；
B, aluminium alloy cast ingot made from step A is subjected to Homogenization Treatments, the temperature of Homogenization Treatments is 450~500 DEG C, heat preservation
Time is 10~20h；
C, the aluminium alloy cast ingot after step B Homogenization Treatments is placed in extruder and is squeezed, obtain required aluminium alloy
Proximate matter, wherein extrusion die use single hole extrusion die, and before extruding, the heating temperature of extrusion die is 480~500 DEG C, is squeezed
The heating temperature of ingot casting is 510~530 DEG C, and the cylinder temperature of extrusion cylinder is 420~440 DEG C, and the extrusion ratio of extrusion cylinder is 48.8,
Extrusion speed in extrusion process is 4.5~6m/min；
D, the aluminium alloy extrusions after squeezing step C carries out online water spray quenching processing in extrusion die exit, ensures that aluminium closes
The size of metal type material, in order to ensure that quenching intensity, aluminium alloy extrusions go out quenching area temperature and answer≤180 DEG C；
E, the quenched aluminium alloy extrusions of step D is subjected to tension straingtening through drawing straightener, by the aluminium alloy after tension straingtening
Proximate matter parks scale sawing after 2h；
F, the aluminium alloy extrusions after step E tension straingtenings is subjected to artificial aging, institution of prescription is 145 ± 5 DEG C × 11h, is obtained
Al Alloy Super pipe proximate matter.
2. the ultra-thin pipe extrudate production technology of 6 line aluminium alloy as described in claim 1, which is characterized in that aluminium in step A
Alloy melting process is to melt, stir, skimming, degasification removal of impurities, filtering, the semi-continuous casting method of casting.
3. the ultra-thin pipe extrudate production technology of 6 line aluminium alloy as described in claim 1, which is characterized in that step A meltings
The temperature control of stove is refined at 700~750 DEG C, and using refining agent.
4. the ultra-thin pipe extrudate production technology of 6 line aluminium alloy as claimed in claim 3, which is characterized in that squeezed in step C
Press is 75MN aluminium extruding machines, a diameter of 300mm of extrusion cylinder.
5. the ultra-thin pipe extrudate production technology of 6 line aluminium alloy as claimed in claim 4, which is characterized in that aluminium in step D
The quenched temperature of alloy profile is 20~30 DEG C.
6. the ultra-thin pipe extrudate production technology of 6 line aluminium alloy as claimed in claim 5, which is characterized in that aluminium in step D
The quenching cooling velocity of alloy profile is 50~80 DEG C/min.
7. the ultra-thin pipe extrudate production technology of 6 line aluminium alloy as claimed in claim 6, which is characterized in that aluminium in step E
The amount of tension of alloy profile controls within 1%.
8. the ultra-thin pipe extrudate production technology of 6 line aluminium alloy as described in claim 1, which is characterized in that step F timeliness
System is to keep the temperature 11h after aluminium alloy extrusions reaches furnace temperature.
9. the ultra-thin pipe extrudate production technology of 6 line aluminium alloys as described in claim 1~8 is any, which is characterized in that step
The Al Alloy Super pipe proximate matter thickness prepared in rapid F is 1.60~1.65mm.
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| CN109306418A (en) * | 2018-11-28 | 2019-02-05 | 中南大学 | Novel 7 line aluminium alloy material and its manufacturing method based on founding and hot extrusion |
| CN109821915A (en) * | 2019-03-20 | 2019-05-31 | 福建省闽发铝业股份有限公司 | A kind of ultra-thin aluminum alloy profile extrusion technique |
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