CN105671384B - Aluminium alloy and preparation method thereof - Google Patents

Aluminium alloy and preparation method thereof Download PDF

Info

Publication number
CN105671384B
CN105671384B CN201610008787.5A CN201610008787A CN105671384B CN 105671384 B CN105671384 B CN 105671384B CN 201610008787 A CN201610008787 A CN 201610008787A CN 105671384 B CN105671384 B CN 105671384B
Authority
CN
China
Prior art keywords
aluminium alloy
alloy
aluminium
temperature
homogenization
Prior art date
Application number
CN201610008787.5A
Other languages
Chinese (zh)
Other versions
CN105671384A (en
Inventor
严绪东
许杰
刘浩
Original Assignee
瑞声光电科技(常州)有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 瑞声光电科技(常州)有限公司 filed Critical 瑞声光电科技(常州)有限公司
Priority to CN201610008787.5A priority Critical patent/CN105671384B/en
Publication of CN105671384A publication Critical patent/CN105671384A/en
Application granted granted Critical
Publication of CN105671384B publication Critical patent/CN105671384B/en

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C21/00Alloys based on aluminium
    • C22C21/10Alloys based on aluminium with zinc as the next major constituent
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C1/00Making alloys
    • C22C1/02Making alloys by melting
    • C22C1/026Alloys based on aluminium
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22FCHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/04Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
    • C22F1/053Changing 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 zinc as the next major constituent

Abstract

The invention discloses a kind of aluminium alloys and preparation method thereof.The component and weight percent of the aluminium alloy be:Zn=4.0~11.0%, Mg=2.0~3.0%, Si=0~0.3%, Ti=0~0.04%, Cu=0~0.2%, Zr=0~0.01%, Cr=0~0.01%, Mn=0~0.01%, Fe<0.1%, surplus is Al and subsidiary impurity, and wherein Zn, Mg weight ratio is:Zn/Mg=2~6.The present invention solves the problems, such as commercial 7xxx systems (such as 7075,7050,7055) high strength alumin ium alloy, and there are the surface appearance defects such as bacillar structure striped, surface jaundice during anodized, it enables aluminum alloy to integrate high intensity and good anodized appearance, further improve the intensity of existing electronic equipment fuselage shell aluminium alloy, effectively meet performance requirement of the lightening development of electronic equipment to fuselage cover aluminum alloy materials, while can also expand the application field of 7xxx series high-strength aluminum alloys.

Description

Aluminium alloy and preparation method thereof

Technical field

The present invention relates to aluminum alloy materials fields more particularly to a kind of aluminium alloy and preparation method thereof.

Background technology

Currently, electronic equipment (such as mobile phone, tablet computer, notebook computer, electronic watch, electronic player, electronic reading Device, electronic console etc.) lightening development trend is presented, this proposes more the performance of the fuselage cover material of electronic equipment High requirement, fuselage cover material not only wants intensity high, while also to have good appearance.It is well known that aluminium closes Gold utensil has the advantages that specific strength is high, processing performance is good, at low cost, and aluminium alloy is handled by anodized surface, can be obtained Obtain good appearance.Compared to common plastics and stainless steel in electronic equipment fuselage sheathing material, anodised aluminium closes Golden material have bright color, specific strength is high, frivolous, corrosion resistance is strong, it is wear-resisting, be not easy to scratch, metal-like remarkably, resistant, The advantages that anti-fingerprint, has significant advantage.Therefore, commercial aluminum alloys become new the one of electronic equipment (such as commercial 6063 alloys) For fuselage cover material.But the intensity of commercial 6063 alloys is relatively low (yield strength is about 210Mpa), is set as electronics Standby host body sheathing material is also easy to produce the deformations such as bending, recess.In current all types of commercial aluminum alloys, 7xxx systems (Al-Zn- Mg-Cu systems) high-strength aluminum alloys such as 7075,7050,7055 in aluminium alloy have highest intensity, it is widely used in aviation boat Its field, traffic and transport field are extremely important light-weight high-strength materials in the field.

But commercial 7xxx series high-strength aluminum alloys (such as 7075,7050,7055) exist during anodized Phenomena such as bacillar structure striped, surface jaundice, black line, stain, influence appearance.Therefore, directly by commercial 7xxx systems aluminium Fuselage cover material after alloy anode oxidation as electronic equipment, appearance do not reach requirement.

Therefore, it is necessary to the work that further conducts a research, to the ingredient of commercial 7xxx line aluminium alloys, phase composition, micro- group It knits structure and preparation process is improved optimization, make outside 7xxx line aluminium alloy collection high intensity and good anodized surface It sees, to meet the performance requirement of electronic equipment fuselage sheathing material.

Invention content

The technical problem to be solved by the present invention is to by the way that commercial 7xxx systems (Al-Zn-Mg-Cu systems), high strength alumin ium alloy is (such as 7075,7050,7055 etc.) ingredient, phase composition, institutional framework, preparation process carry out innovation and improve it in anodic oxidation The defects of bacillar structure striped present in processing procedure, surface jaundice, black line problem, develop it is a kind of there is high intensity, And there is the aluminium alloy and preparation method thereof of good anodized appearance simultaneously.

Aluminium alloy provided by the invention, the component and weight percent of the aluminium alloy are:Zn=4.0~11.0%, Mg= 2.0~3.0%, Si=0~0.3%, Ti=0~0.04%, Cu=0~0.2%, Zr=0~0.01%, Cr=0~ 0.01%, Mn=0~0.01%, Fe<0.1%, surplus is Al and subsidiary impurity, and wherein Zn, Mg weight ratio is:Zn/Mg=2 ~6.

Above-mentioned aluminium alloy, the component and weight percent of the aluminium alloy are:Zn=5.5~8.6%, Mg=2.0~ 2.6%, Si=0~0.2%, Ti=0~0.03%, Cu=0~0.15%, Zr=0~0.01%, Cr=0~0.01%, Mn =0~0.01%, Fe<0.08%, surplus is Al and subsidiary impurity, and wherein Zn, Mg weight ratio is:Zn/Mg=2~6.

Above-mentioned aluminium alloy, in the impurity, single impurity content is no more than 0.01%.

The tensile strength of above-mentioned aluminium alloy, the aluminium alloy is more than 420Mpa.

The hardness of above-mentioned aluminium alloy, the aluminium alloy is more than 140HV.

The present invention also provides a kind of preparation methods of above-mentioned aluminium alloy, including:

Raw material is weighed, dispensing is carried out according to the weight percent of each component;

By the raw material at 740~760 DEG C after melting, is poured into a mould and obtained at 710~730 DEG C using semi-continuous casting method Obtain ingot casting;

Two-step homogenization processing is carried out to the ingot casting, the temperature of first order homogenization is 420 DEG C~440 DEG C, and the time is 12~for 24 hours;It is 24~36h that the temperature of second level homogenization, which is 460 DEG C~475 DEG C homogenization times,;

Blank is obtained to passing through the ingot casting progress peeling of Homogenization Treatments, cutting saw, thermal deformation processing then is carried out to blank Processing obtains alloy product;

The alloy product is subjected to solution treatment, is then quickly quenching into room temperature;Solid solubility temperature is 460~480 DEG C, when Between be 1~4h;

Aging strengthening model is carried out to the product after solution treatment, to obtain above-mentioned alloy product.

Above-mentioned aluminium alloy preparation method, the raw material include the aluminium ingot of purity >=99.99%, purity >=99.99% Zinc, the magnesium of purity >=99.99% and grain refiner Al-Ti-B.

Above-mentioned aluminium alloy preparation method, the aging thermal treating process are T6 single-stage agings, T73 two-stage time effects and T77 Any one in multistage aging.

Above-mentioned aluminium alloy preparation method, the thermal deformation working process use extrusion process, squeeze temperature be 410~ 440 DEG C, when heat preservation a length of 2~4h.

The beneficial effects of the present invention are:It solves commercial 7xxx systems (such as 7075,7050,7055) high strength alumin ium alloy to exist There are the surface appearance defects such as bacillar structure striped, surface jaundice during anodized, it is high to enable aluminum alloy to collection Intensity and good anodized appearance, further improve existing electronic equipment fuselage shell and are closed with aluminium The intensity of gold effectively meets performance requirement of the lightening development of electronic equipment to fuselage cover aluminum alloy materials, while also can Expand the application field of 7xxx series high-strength aluminum alloys.The general characteristic of aluminium alloy provided by the invention is:Tensile strength > 420Mpa;Hardness > 140HV;With uniformly tiny recrystallization equi-axed crystal;It can be obtained by anodized good Appearance.

Description of the drawings

Fig. 1 is the metallographic structure shape appearance figure of commercial 7050 aluminium alloys;

Fig. 2 is the metallographic structure shape appearance figure of aluminium alloy provided by the invention.

Specific implementation mode

The following is a clear and complete description of the technical scheme in the embodiments of the invention, it is clear that described embodiment Only it is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, the common skill in this field All other embodiment that art personnel are obtained without making creative work belongs to the model that the present invention protects It encloses.

The component and weight percent of aluminium alloy provided by the invention be:Zn=4.0~11.0%, Mg=2.0~ 3.0%, Si=0~0.3%, Ti=0~0.04%, Cu=0~0.2%, Zr=0~0.01%, Cr=0~0.01%, Mn =0~0.01%, Fe<0.1%, surplus is Al and subsidiary impurity, and wherein Zn, Mg weight ratio is:Zn/Mg=2~6.

Preferably, the component and weight percent of the aluminium alloy are:Zn=5.5~8.6%, Mg=2.0~2.6%, Si=0~0.2%, Ti=0~0.03%, Cu=0~0.15%, Zr=0~0.01%, Cr=0~0.01%, Mn=0~ 0.01%, Fe<0.08%, surplus is Al and subsidiary impurity, and wherein Zn, Mg weight ratio is:Zn/Mg=2~6.

Wherein, element is need to strengthen based on Zn, Mg element, tiny η ' is formed in the alloy after solid-solution and aging heat treatment (MgZn2) phase, the intensity of alloy can be improved.

Cu elements are in conventional commercial 7xxx systems (Al-Zn-Mg-Cu systems) high strength alumin ium alloy (such as 7075,7050,7055) Weight percent content be 2% or so, invigoration effect can be played the role of and improve corrosion resistance, but Cu constituent contents are high So that alloy is turned to be yellow in anodized rear surface, influences appearance, thus, Cu elements are strictly controlled in aluminium alloy of the present invention Additive amount, do not add Cu or the content of Cu be strict controlled in 0~0.2% range to improve the superficiality of alloy of the present invention Can, while alloy being made to keep higher corrosion resistance.

Si elements are the elements of generally existing in commercial 7xxx systems (Al-Zn-Mg-Cu systems) aluminium alloy, but in the present invention one In a little alloys Mg is formed added with a certain amount of Si elements2For Si phases with reinforced alloys, the additive amount of Si elements is 0~0.3% model In enclosing.

Zr elements are trace elements important in commercial 7xxx line aluminium alloys, are formed in conventional commercial 7xxx line aluminium alloys Al3Zr particles inhibit alloy in the recrystallization of hot-working and solution treatment process, form subgrain and bacillar structure structure is special Sign, this characteristics of organizational structure improves anti-stress corrosion performance to conventional commercial 7xxx line aluminium alloys important role, but this Alloy surface can be made to form bacillar structure striped in anode oxidation process, influence appearance, and it is right in alloy of the present invention The requirement of the grain structure structure of alloy is completely different with conventional commercial 7xxx systems alloys, needs to form the uniform of perfect recrystallization Tiny equi-axed crystal, to ensure that alloy can obtain the anodized surface appearance of no bacillar structure striped, thus this hair The additive amount that Zr elements are strictly controlled in bright aluminium alloy, the content for not adding Zr or Zr are strict controlled in 0~0.01% range, make Alloy obtains isometric recrystal grain tissue signature.

Ti elements are added to as grain refiner in 7xxx systems (Al-Zn-Mg-Cu systems) aluminium alloy, and it is brilliant to play refining alloy The effect of grain, using Al-Ti series grain refiners general in aluminium alloy industry, the content control of Ti elements in alloy of the present invention System is in 0~0.04% range.

Fe elements are the trace elements of generally existing in commercial 7xxx line aluminium alloys, are formed in alloy larger-size containing Fe Second phase particles are easily broken into linear distribution along the direction of extrusion in extrusion process used for forming, make alloy in anode oxidation process The defects of easily forming stain, black line, thus Fe constituent contents are strictly controlled in aluminium alloy of the present invention, Fe constituent contents <0.1%.

Cr and Mn elements are the trace elements of generally existing in commercial 7xxx systems (Al-Zn-Mg-Cu systems) aluminium alloy, in order to So that alloy is met the surface property requirement of anodic oxidation, the additive amount of Cr, Mn element is strictly controlled in alloy of the present invention, is not added Add Cr and Mn elements or Cr and Mn constituent contents are strict controlled in 0~0.01% range respectively.

Preferably, the subsidiary impurity of the aluminium alloy, single impurity content are no more than 0.01%.Subsidiary impurity is control Element except range, they inevitably enter from raw metal, salvage material.

Meanwhile the present invention also provides a kind of preparation methods of aluminium alloy comprising:

Step S1:Raw material is weighed, dispensing is carried out according to the weight percent of each component;

The wherein described raw material includes the aluminium ingot of purity >=99.99%, the zinc of purity >=99.99%, purity >=99.99% Magnesium and grain refiner Al-Ti-B.

Step S2:After the raw material melting, ingot casting is obtained using semi-continuous casting method;

The temperature of the wherein described raw material melting is controlled at 740~760 DEG C.In the raw material fusion process, need to molten Body sampling carries out chemical composition analysis, is allowed to determination and reaches required composition range requirement, is adjusted accordingly if having deviation It is whole;After the raw material becomes melt, refining agent can also be added and refined, to eliminate the gas and sundries in melt, make to melt Body purifies, and a period of time is stood after skimming, then prepare ingot casting using semi-continuous casting method.During preparing ingot casting, need Line is added grain refiner Al-Ti-B and is poured into a mould, and pouring temperature is controlled at 710~730 DEG C.

Step S3:Two-step homogenization processing is carried out to the ingot casting;

The first order homogenization temperature be 420 DEG C~440 DEG C, the time be 12~for 24 hours;The second level homogenization temperature be 460 DEG C~475 DEG C homogenization times are 24~36h;

Step S4:Blank is obtained to passing through the ingot casting progress peeling of Homogenization Treatments, cutting saw;

Step S5:By the blank through overheating deforming working process, solution heat treatment, quenching treatment, aging strengthening model work After skill, aluminium alloy finished product is made.Specifically, in the present embodiment, thermal deformation working process uses extrusion process, remaining embodiment In, the processing technologys such as rolling can also be used.First by the blank in 410~440 DEG C of range inside holding 2-4h, then at 1000 tons The blank is squeezed into plate proximate matter on extruder, extrusion ratio 27.7, to obtain that surface quality is good and even tissue Plate proximate matter is squeezed, extrusion die is optimized, and strictly control extrusion speed and extruding temperature.To the extrudate of acquisition After scale sawing, carry out solution heat treatment, by the way of continuous warming at a slow speed, at 460~480 DEG C keep the temperature 1~3h, then into Row quenching treatment, then carry out aging strengthening model.According to the difference of alloying component, aging thermal treating process difference, wherein institute It is any one in T6 single-stage agings, T73 two-stage time effects and T77 multistage agings to state aging thermal treating process.

Embodiment 1

Contain Zn=4.42%, Mg=2.08%, Ti=0.027%, Cu=0.01%, Zr=0.01%, Cr=to prepare 0.01%, Mn=0.01%, Si=0.04%, Fe=0.08%, surplus are Al and subsidiary impurity, wherein Zn, Mg weight ratio For:For the aluminium alloy of Zn/Mg=2.13.

Dispensing is carried out according to constituent content first, raw material aluminium ingot, zinc, magnesium are then passed through into oil removing, degasification and surface oxidation Object is added to after being mingled in crucible;Crucible is warming up to 740 DEG C, after the raw material in crucible all fusing, sampling carries out chemistry Constituent analysis is allowed to determination and reaches required composition range requirement, is adjusted correspondingly if having deviation, while refining is added Agent is refined, and to eliminate the gas and sundries in melt, makes cleaning molten, and a period of time is stood after skimming, online that crystalline substance is added Grain fining agent Al-Ti-B is poured into a mould, and pouring temperature is controlled at 710 DEG C, is prepared into cylindrical ingot;Cylindrical ingot is existed It is 420 DEG C/12h+460 DEG C/carry out two-step homogenization down for 24 hours, then air-cooled in air;Through peeling, cut saw after obtain cylindrical type Extrusion billet;Blank is kept the temperature into 3h at 420 DEG C, blank is then squeezed into plate proximate matter on 1000 tons of extruders, is squeezed Than being 27.7;Plate proximate matter is subjected to solution heat treatment by the way of continuous warming at a slow speed, at 460 DEG C keep the temperature 2h, then into Row Water Quenching;Finally carry out T6 single-stage aging processing, you can aluminium alloy finished product is made.

According to relevant performance test standard, the room-temperature mechanical property of aluminium alloy finished product obtained is tested, is tested As a result it is:Tensile strength is 424MPa, yield strength 401MPa, hardness 141Hv.

Embodiment 2

Contain Zn=5.79%, Mg=2.12%, Ti=0.029%, Cu=0.11%, Zr=0.005%, Cr=to prepare 0.005%, Mn=0.005%, Si=0.04%, Fe=0.07%, surplus are Al and subsidiary impurity, wherein Zn, Mg weight Than for:For the aluminium alloy of Zn/Mg=2.73.

Dispensing is carried out according to constituent content first, raw material aluminium ingot, zinc, magnesium are then passed through into oil removing, degasification and surface oxidation Object is added to after being mingled in crucible;Crucible is warming up to 750 DEG C, after the raw material in crucible all fusing, sampling carries out chemistry Constituent analysis is allowed to determination and reaches required composition range requirement, is adjusted correspondingly if having deviation, while refining is added Agent is refined, and to eliminate the gas and sundries in melt, makes cleaning molten, and a period of time is stood after skimming, online that crystalline substance is added Grain fining agent Al-Ti-B is poured into a mould, and pouring temperature is controlled at 720 DEG C, is prepared into cylindrical ingot;Cylindrical ingot is existed It is 425 DEG C/12h+460 DEG C/carry out two-step homogenization down for 24 hours, then air-cooled in air;Through peeling, cut saw after obtain cylindrical type Extrusion billet;Blank is kept the temperature into 3h at 430 DEG C, blank is then squeezed into plate proximate matter on 1000 tons of extruders, is squeezed Than being 28.0;Plate proximate matter is subjected to solution heat treatment by the way of continuous warming at a slow speed, at 470 DEG C keep the temperature 1h, then into Row Water Quenching;Finally carry out T73 two-stage time effect processing, you can aluminium alloy finished product is made.

According to relevant performance test standard, the room-temperature mechanical property of aluminium alloy finished product obtained is tested, is tested As a result it is:Tensile strength is 438MPa, yield strength 405MPa, hardness 145Hv.

Embodiment 3

Contain Zn=6.21%, Mg=2.09%, Ti=0.028%, Cu=0.008%, Zr=0.009%, Cr to prepare =0.009%, Mn=0.009%, Si=0.03%, Fe=0.06%, surplus are Al and subsidiary impurity, wherein Zn, Mg weight Measuring ratio is:For the aluminium alloy of Zn/Mg=2.97.

Dispensing is carried out according to constituent content first, raw material aluminium ingot, zinc, magnesium are then passed through into oil removing, degasification and surface oxidation Object is added to after being mingled in crucible;Crucible is warming up to 760 DEG C, after the raw material in crucible all fusing, sampling carries out chemistry Constituent analysis is allowed to determination and reaches required composition range requirement, is adjusted correspondingly if having deviation, while refining is added Agent is refined, and to eliminate the gas and sundries in melt, makes cleaning molten, and a period of time is stood after skimming, online that crystalline substance is added Grain fining agent Al-Ti-B is poured into a mould, and pouring temperature is controlled at 730 DEG C, is prepared into cylindrical ingot;Cylindrical ingot is existed It is 430 DEG C/16h+465 DEG C/carry out two-step homogenization down for 24 hours, then air-cooled in air;Through peeling, cut saw after obtain cylindrical type Extrusion billet;Blank is kept the temperature into 1h at 440 DEG C, blank is then squeezed into plate proximate matter on 1000 tons of extruders, is squeezed Than being 27.5;Plate proximate matter is subjected to solution heat treatment by the way of continuous warming at a slow speed, at 480 DEG C keep the temperature 3h, then into Row Water Quenching;Finally carry out T77 multistage aging processing, you can aluminium alloy finished product is made.

According to relevant performance test standard, the room-temperature mechanical property of aluminium alloy finished product obtained is tested, is tested As a result it is:Tensile strength is 450MPa, yield strength 431MPa, hardness 146Hv.

Embodiment 4

Contain Zn=6.68%, Mg=2.29%, Ti=0.030%, Cu=0~0.008%, Zr=0.007% to prepare, Cr=0.007%, Mn=0.007%, Si=0.04%, Fe=0.049%, surplus are Al and subsidiary impurity, wherein Zn, Mg Weight ratio is:For the aluminium alloy of Zn/Mg=2.92.

Dispensing is carried out according to constituent content first, raw material aluminium ingot, zinc, magnesium are then passed through into oil removing, degasification and surface oxidation Object is added to after being mingled in crucible;Crucible is warming up to 755 DEG C, after the raw material in crucible all fusing, sampling carries out chemistry Constituent analysis is allowed to determination and reaches required composition range requirement, is adjusted correspondingly if having deviation, while refining is added Agent is refined, and to eliminate the gas and sundries in melt, makes cleaning molten, and a period of time is stood after skimming, online that crystalline substance is added Grain fining agent Al-Ti-B is poured into a mould, and pouring temperature is controlled at 725 DEG C, is prepared into cylindrical ingot;Cylindrical ingot is existed Two-step homogenization is carried out under 430 DEG C/16h+465 DEG C/30h, it is then air-cooled in air;Through peeling, cut saw after obtain cylindrical type Extrusion billet;Blank is kept the temperature into 3h at 435 DEG C, blank is then squeezed into plate proximate matter on 1000 tons of extruders, is squeezed Than being 27.4;Plate proximate matter is subjected to solution heat treatment by the way of continuous warming at a slow speed, at 475 DEG C keep the temperature 4h, then into Row Water Quenching;Finally carry out T73 two-stage time effect processing, you can aluminium alloy finished product is made.

According to relevant performance test standard, the room-temperature mechanical property of aluminium alloy finished product obtained is tested, is tested As a result it is:Tensile strength is 471MPa, yield strength 445MPa, hardness 157Hv.

Embodiment 5

Contain Zn=7.19%, Mg=2.32%, Ti=0.028%, Cu=0.10%, Zr=0.008%, Cr=to prepare 0.008%, Mn=0.008%, Si=0.17%, Fe=0.06%, surplus are Al and subsidiary impurity, wherein Zn, Mg weight Than for:For the aluminium alloy of Zn/Mg=3.10.

Dispensing is carried out according to constituent content first, raw material aluminium ingot, zinc, magnesium are then passed through into oil removing, degasification and surface oxidation Object is added to after being mingled in crucible;Crucible is warming up to 745 DEG C, after the raw material in crucible all fusing, sampling carries out chemistry Constituent analysis is allowed to determination and reaches required composition range requirement, is adjusted correspondingly if having deviation, while refining is added Agent is refined, and to eliminate the gas and sundries in melt, makes cleaning molten, and a period of time is stood after skimming, online that crystalline substance is added Grain fining agent Al-Ti-B is poured into a mould, and pouring temperature is controlled at 720 DEG C, is prepared into cylindrical ingot;Cylindrical ingot is existed It is 430 DEG C/16h+465 DEG C/carry out two-step homogenization down for 24 hours, then air-cooled in air;Through peeling, cut saw after obtain cylindrical type Extrusion billet;Blank is preheated into 1h at 430 DEG C, blank is then squeezed into plate proximate matter on 1000 tons of extruders, is squeezed Than being 27.5;Plate proximate matter is subjected to solution heat treatment by the way of continuous warming at a slow speed, at 470 DEG C keep the temperature 2h, then into Row Water Quenching;Finally carry out T73 two-stage time effect processing, you can aluminium alloy finished product is made.

According to relevant performance test standard, the room-temperature mechanical property of aluminium alloy finished product obtained is tested, is tested As a result it is:Tensile strength is 497MPa, yield strength 472MPa, hardness 161Hv.

Embodiment 6

Contain Zn=7.62%, Mg=2.29%, Ti=0.030%, Cu=0.12%, Zr=0.009%, Cr=to prepare 0.009%, Mn=0.009%, Si=0.18%, Fe=0.06%, surplus are Al and subsidiary impurity, wherein Zn, Mg weight Than for:For the aluminium alloy of Zn/Mg=3.32.

Dispensing is carried out according to constituent content first, raw material aluminium ingot, zinc, magnesium are then passed through into oil removing, degasification and surface oxidation Object is added to after being mingled in crucible;Crucible is warming up to 745 DEG C, after the raw material in crucible all fusing, sampling carries out chemistry Constituent analysis is allowed to determination and reaches required composition range requirement, is adjusted correspondingly if having deviation, while refining is added Agent is refined, and to eliminate the gas and sundries in melt, makes cleaning molten, and a period of time is stood after skimming, online that crystalline substance is added Grain fining agent Al-Ti-B is poured into a mould, and pouring temperature is controlled at 730 DEG C, is prepared into cylindrical ingot;Cylindrical ingot is existed Two-step homogenization is carried out under 435 DEG C/20h+475 DEG C/36h, it is then air-cooled in air;Through peeling, cut saw after obtain cylindrical type Extrusion billet;Blank is kept the temperature into 2h at 430 DEG C, blank is then squeezed into plate proximate matter on 1000 tons of extruders, is squeezed Than being 28.1;Plate proximate matter is subjected to solution heat treatment by the way of continuous warming at a slow speed, at 475 DEG C keep the temperature 2h, then into Row Water Quenching;Finally carry out T6 single-stage aging processing, you can aluminium alloy finished product is made.

According to relevant performance test standard, the room-temperature mechanical property of aluminium alloy finished product obtained is tested, is tested As a result it is:Tensile strength is 508MPa, yield strength 482MPa, hardness 165Hv.

Embodiment 7

Contain Zn=8.53%, Mg=2.42%, Ti=0.028%, Cu=0.15%, Zr=0.009%, Cr=to prepare 0.009%, Mn=0.009%, Si=0.18%, Fe=0.06%, surplus are Al and subsidiary impurity, wherein Zn, Mg weight Than for:For the aluminium alloy of Zn/Mg=3.52.

Dispensing is carried out according to constituent content first, raw material aluminium ingot, zinc, magnesium are then passed through into oil removing, degasification and surface oxidation Object is added to after being mingled in crucible;Crucible is warming up to 750 DEG C, after the raw material in crucible all fusing, sampling carries out chemistry Constituent analysis is allowed to determination and reaches required composition range requirement, is adjusted correspondingly if having deviation, while refining is added Agent is refined, and to eliminate the gas and sundries in melt, makes cleaning molten, and a period of time is stood after skimming, online that crystalline substance is added Grain fining agent Al-Ti-B is poured into a mould, and pouring temperature is controlled at 720 DEG C, is prepared into cylindrical ingot;Cylindrical ingot is existed Two-step homogenization is carried out under 435 DEG C/20h+468 DEG C/36h, it is then air-cooled in air;Through peeling, cut saw after obtain cylindrical type Extrusion billet;Blank is preheated into 3h at 430 DEG C, blank is then squeezed into plate proximate matter on 1000 tons of extruders, is squeezed Than being 27.9;Plate proximate matter is subjected to solution heat treatment by the way of continuous warming at a slow speed, at 480 DEG C keep the temperature 2h, then into Row Water Quenching;Finally carry out T77 multistage aging processing, you can aluminium alloy finished product is made.

According to relevant performance test standard, the room-temperature mechanical property of aluminium alloy finished product obtained is tested, is tested As a result it is:Tensile strength is 538MPa, yield strength 515MPa, hardness 173Hv.

Embodiment 8

Contain Zn=9.02%, Mg=2.61%, Ti=0.031%, Cu=0.20%, Zr=0.01%, Cr=to prepare 0.01%, Mn=0.01%, Si=0.18%, Fe=0.07%, surplus are Al and subsidiary impurity, wherein Zn, Mg weight ratio For:For the aluminium alloy of Zn/Mg=3.46.

Dispensing is carried out according to constituent content first, raw material aluminium ingot, zinc, magnesium are then passed through into oil removing, degasification and surface oxidation Object is added to after being mingled in crucible;Crucible is warming up to 755 DEG C, after the raw material in crucible all fusing, sampling carries out chemistry Constituent analysis is allowed to determination and reaches required composition range requirement, is adjusted correspondingly if having deviation, while refining is added Agent is refined, and to eliminate the gas and sundries in melt, makes cleaning molten, and a period of time is stood after skimming, online that crystalline substance is added Grain fining agent Al-Ti-B is poured into a mould, and pouring temperature is controlled at 720 DEG C, is prepared into cylindrical ingot;Cylindrical ingot is existed Two-step homogenization is carried out under 435 DEG C/20h+470 DEG C/36h, it is then air-cooled in air;Through peeling, cut saw after obtain cylindrical type Extrusion billet;Blank is kept the temperature into 3h at 430 DEG C, blank is then squeezed into plate proximate matter on 1000 tons of extruders, is squeezed Than being 27.4;Plate proximate matter is subjected to solution heat treatment by the way of continuous warming at a slow speed, at 470 DEG C keep the temperature 3h, then into Row Water Quenching;Finally carry out T77 multistage aging processing, you can aluminium alloy finished product is made.

According to relevant performance test standard, the room-temperature mechanical property of aluminium alloy finished product obtained is tested, is tested As a result it is:Tensile strength is 549MPa, yield strength 523MPa, hardness 175Hv.

Embodiment 9

Contain Zn=10.11%, Mg=2.41%, Ti=0.028%, Cu=0.19%, Zr=0.01%, Cr=to prepare 0.01%, Mn=0.01%, Si=0.23%, Fe=0.075%, surplus are Al and subsidiary impurity, wherein Zn, Mg weight ratio For:For the aluminium alloy of Zn/Mg=4.20.

Dispensing is carried out according to constituent content first, raw material aluminium ingot, zinc, magnesium are then passed through into oil removing, degasification and surface oxidation Object is added to after being mingled in crucible;Crucible is warming up to 760 DEG C, after the raw material in crucible all fusing, sampling carries out chemistry Constituent analysis is allowed to determination and reaches required composition range requirement, is adjusted correspondingly if having deviation, while refining is added Agent is refined, and to eliminate the gas and sundries in melt, makes cleaning molten, and a period of time is stood after skimming, online that crystalline substance is added Grain fining agent Al-Ti-B is poured into a mould, and pouring temperature is controlled at 710 DEG C, is prepared into cylindrical ingot;Cylindrical ingot is existed Two-step homogenization is carried out under 435 DEG C/20h+472 DEG C/36h, it is then air-cooled in air;Through peeling, cut saw after obtain cylindrical type Extrusion billet;Blank is kept the temperature into 1h at 440 DEG C, blank is then squeezed into plate proximate matter on 1000 tons of extruders, is squeezed Than being 28.3;Plate proximate matter is subjected to solution heat treatment by the way of continuous warming at a slow speed, at 470 DEG C keep the temperature 2h, then into Row Water Quenching;Finally carry out T77 multistage aging processing, you can aluminium alloy finished product is made.

According to relevant performance test standard, the room-temperature mechanical property of aluminium alloy finished product obtained is tested, is tested As a result it is:Tensile strength is 565MPa, yield strength 534MPa, hardness 177Hv.

Embodiment 10

Contain Zn=11.00%, Mg=2.95%, Ti=0.039%, Cu=0.01%, Zr=0.01%, Cr=to prepare 0.01%, Mn=0.01%, Si=0.28%, Fe=0.08%, surplus are Al and subsidiary impurity, wherein Zn, Mg weight ratio For:For the aluminium alloy of Zn/Mg=3.74.

Dispensing is carried out according to constituent content first, raw material aluminium ingot, zinc, magnesium are then passed through into oil removing, degasification and surface oxidation Object is added to after being mingled in crucible;Crucible is warming up to 760 DEG C, after the raw material in crucible all fusing, sampling carries out chemistry Constituent analysis is allowed to determination and reaches required composition range requirement, is adjusted correspondingly if having deviation, while refining is added Agent is refined, and to eliminate the gas and sundries in melt, makes cleaning molten, and a period of time is stood after skimming, online that crystalline substance is added Grain fining agent Al-Ti-B is poured into a mould, and pouring temperature is controlled at 720 DEG C, is prepared into cylindrical ingot;Cylindrical ingot is existed Two-step homogenization is carried out under 440 DEG C /+475 DEG C for 24 hours/36h, it is then air-cooled in air;Through peeling, cut saw after obtain cylindrical type Extrusion billet;Blank is preheated into 2h at 420 DEG C, blank is then squeezed into plate proximate matter on 1000 tons of extruders, is squeezed Than being 28.4;Plate proximate matter is subjected to solution heat treatment by the way of continuous warming at a slow speed, at 480 DEG C keep the temperature 1h, then into Row Water Quenching;Finally carry out T6 single-stage aging processing, you can aluminium alloy finished product is made.

According to relevant performance test standard, the room-temperature mechanical property of aluminium alloy finished product obtained is tested, is tested As a result it is:Tensile strength is 584MPa, yield strength 552MPa, hardness 181Hv.

In conclusion aluminium alloy provided by the invention has higher tensile strength, yield force and hardness, general characteristic For:Tensile strength > 420Mpa, hardness > 140HV.

Please refer to Fig.1 again and Fig. 2, wherein Fig. 1 be commercial 7050 aluminium alloys metallographic structure shape appearance figure, Fig. 2 is the present invention The metallographic structure shape appearance figure of the aluminium alloy of offer.It will be seen from figure 1 that Zr elements form ribbon in commercial 7050 aluminium alloys Shape tissue, and from figure 2 it can be seen that aluminium alloy provided by the invention forms after the strictly additive amount of control Zr elements Shaft-like recrystal grain tissue, and uniform small grains.Therefore, aluminium alloy provided by the invention has high intensity aluminium conjunction simultaneously Gold can obtain good appearance by anodized.

Example the above is only the implementation of the present invention is not intended to limit the scope of the invention, every to utilize this hair Equivalent structure or equivalent flow shift made by bright specification and accompanying drawing content is applied directly or indirectly in other relevant skills Art field, is included within the scope of the present invention.

Claims (8)

1. a kind of aluminium alloy, which is characterized in that the component and weight percent of the aluminium alloy be:Zn=4.0~11.0%, Mg= 2.0~3.0%, Si=0~0.3%, Ti=0~0.04%, Cu=0~0.2%, Zr=0~0.01%, Cr=0~ 0.01%, Mn=0~0.01%, Fe<0.1%, surplus is Al and subsidiary impurity, and wherein Zn, Mg weight ratio is:Zn/Mg= 3.46~6, the tensile strength of the aluminium alloy is more than 538Mpa.
2. aluminium alloy according to claim 1, which is characterized in that the component and weight percent of the aluminium alloy be:Zn= 5.5~8.6%, Mg=2.0~2.6%, Si=0~0.2%, Ti=0~0.03%, Cu=0~0.15%, Zr=0~ 0.01%, Cr=0~0.01%, Mn=0~0.01%, Fe<0.08%, surplus is Al and subsidiary impurity.
3. aluminium alloy according to claim 1 or 2, which is characterized in that in the impurity, single impurity content is no more than 0.01%.
4. aluminium alloy according to claim 1, which is characterized in that the hardness of the aluminium alloy is more than 140HV.
5. a kind of preparation method for any aluminium alloy in claim 1~2, which is characterized in that including:
Raw material is weighed, dispensing is carried out according to the weight percent of each component;
By the raw material at 740~760 DEG C after melting, is poured into a mould and cast at 710~730 DEG C using semi-continuous casting method Ingot;
To the ingot casting carry out two-step homogenization processing, the first order homogenization temperature be 420 DEG C~440 DEG C, the time be 12~ 24h;It is 24~36h that the temperature of second level homogenization, which is 460 DEG C~475 DEG C homogenization times,;
Blank is obtained to passing through the ingot casting progress peeling of Homogenization Treatments, cutting saw, thermal deformation working process then is carried out to blank Obtain alloy product;
The alloy product is subjected to solution treatment, is then quickly quenching into room temperature;Solid solubility temperature is 460~480 DEG C, and the time is 1~4h;
Aging strengthening model is carried out to the product after solution treatment, to obtain above-mentioned alloy product.
6. the preparation method of aluminium alloy according to claim 5, which is characterized in that the raw material include purity >= 99.99% aluminium ingot, the zinc of purity >=99.99%, the magnesium of purity >=99.99% and grain refiner Al-Ti-B.
7. the preparation method of aluminium alloy according to claim 5, which is characterized in that the aging thermal treating process is that T6 is mono- Any one in grade timeliness, T73 two-stage time effects and T77 multistage agings.
8. the preparation method of aluminium alloy according to claim 5, which is characterized in that the thermal deformation working process is using crowded Pressure technique, it is 410~440 DEG C to squeeze temperature, when heat preservation a length of 2~4h.
CN201610008787.5A 2016-01-07 2016-01-07 Aluminium alloy and preparation method thereof CN105671384B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610008787.5A CN105671384B (en) 2016-01-07 2016-01-07 Aluminium alloy and preparation method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610008787.5A CN105671384B (en) 2016-01-07 2016-01-07 Aluminium alloy and preparation method thereof

Publications (2)

Publication Number Publication Date
CN105671384A CN105671384A (en) 2016-06-15
CN105671384B true CN105671384B (en) 2018-10-09

Family

ID=56299383

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201610008787.5A CN105671384B (en) 2016-01-07 2016-01-07 Aluminium alloy and preparation method thereof

Country Status (1)

Country Link
CN (1) CN105671384B (en)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180024028A (en) 2013-09-30 2018-03-07 애플 인크. Aluminum alloys with high strength and cosmetic appeal
US10208371B2 (en) 2016-07-13 2019-02-19 Apple Inc. Aluminum alloys with high strength and cosmetic appeal
CN106222501B (en) * 2016-08-26 2017-11-10 龙口市丛林铝材有限公司 A kind of electronic product casing extruding aluminium alloy and its manufacture method
CN106244875B (en) * 2016-09-08 2018-12-11 四川福蓉科技股份公司 7 line aluminium alloys of one kind and preparation method thereof
CN106868362A (en) * 2017-01-18 2017-06-20 苏州中色研达金属技术有限公司 Smart mobile phone appearance member 7xxx line aluminium alloys and its processing method
CN106756306B (en) * 2017-03-10 2018-06-19 山东泰义金属科技有限公司 A kind of processing method of door and window aluminium alloy
CN107119215B (en) * 2017-06-27 2019-01-04 中南大学 A kind of superpower aluminium alloy and preparation method thereof
CN107267898A (en) * 2017-07-07 2017-10-20 哈尔滨中飞新技术股份有限公司 A kind of 7075 aluminium alloy homogenising treatment methods
CN107964615A (en) * 2017-11-22 2018-04-27 华南理工大学 A kind of extrudate high-strength 7xxx line aluminium alloys and preparation method thereof
CN108265210A (en) * 2017-12-21 2018-07-10 歌尔股份有限公司 A kind of aluminum alloy materials, Al-alloy products and preparation method thereof
CN108330356A (en) * 2018-02-01 2018-07-27 佛山市三水凤铝铝业有限公司 A kind of tough anticorodal aluminium alloy of height and its pressing method for rail traffic
CN108048715B (en) * 2018-02-01 2019-07-16 佛山市三水凤铝铝业有限公司 A kind of high-strength aluminum alloy and its pressing method for consumption electronic product shell
CN108465713B (en) * 2018-02-09 2019-08-30 深圳市华加日西林实业有限公司 The processing technology and aluminium alloy extrusions of 7075 aluminium alloy extrusions
CN108611534B (en) * 2018-03-14 2019-12-27 Oppo广东移动通信有限公司 Alloy material, case, and electronic device
CN108754258A (en) * 2018-06-26 2018-11-06 安徽沪源铝业有限公司 7055 aluminium alloys of one kind and its aging technique
CN108456812B (en) * 2018-06-29 2020-02-18 中南大学 Low-Sc high-strength high-toughness high-hardenability aluminum-zinc-magnesium alloy and preparation method thereof
CN109355538B (en) * 2018-12-05 2020-10-20 辽宁忠旺集团有限公司 Production process of high-strength 7-series aluminum alloy pipe
CN110184508A (en) * 2019-06-03 2019-08-30 江苏创斯达科技有限公司 A kind of stepless transmission aluminum alloy casing and preparation method thereof
CN111118419A (en) * 2019-12-30 2020-05-08 辽宁忠旺集团有限公司 7000 series aluminum alloy section and preparation process thereof

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101407876A (en) * 2008-09-17 2009-04-15 北京有色金属研究总院 Aluminum alloy material for manufacturing large cross section main load-carrying structure member and preparation thereof
CN101701308B (en) * 2009-11-11 2011-09-28 苏州有色金属研究院有限公司 High-damage tolerance type ultrahigh strength aluminum alloy and preparation method thereof
CN102108463B (en) * 2010-01-29 2012-09-05 北京有色金属研究总院 Aluminium alloy product suitable for manufacturing structures and preparation method
CN102011037B (en) * 2010-12-10 2013-04-24 北京工业大学 Rare earth Er microalloyed Al-Zn-Mg-Cu alloy and preparation method thereof
CN103233148B (en) * 2012-08-23 2016-01-20 北京有色金属研究总院 One is applicable to structure-function integration Al-alloy products and preparation method
JP2015040320A (en) * 2013-08-21 2015-03-02 株式会社Uacj High strength aluminum alloy, and method for producing the same
CN103898382B (en) * 2014-03-27 2017-01-04 北京科技大学 Superpower high-ductility corrosion Al Zn Mg Cu aluminum alloy materials and preparation method thereof
CN104032193B (en) * 2014-05-20 2016-07-20 南京中车浦镇城轨车辆有限责任公司 A kind of Al-Zn-Mg alloy and the preparation method of section bar thereof

Also Published As

Publication number Publication date
CN105671384A (en) 2016-06-15

Similar Documents

Publication Publication Date Title
RU2717434C2 (en) High-strength aluminium alloys 7xxx and methods for production thereof
CN103255324B (en) Aluminum alloy material suitable for manufacturing car body panel and preparation method
CN104018041B (en) A kind of high ferro car body aluminium section bar and preparation method thereof
CN102978488B (en) Production technology of aluminum alloy sectional bar for automobile bumper
Zhao et al. Microstructural evolution and tensile mechanical properties of thixoforged ZK60-Y magnesium alloys produced by two different routes
CN102108463B (en) Aluminium alloy product suitable for manufacturing structures and preparation method
KR101883021B1 (en) Improved 7xxx aluminum alloys, and methods for producing the same
US20190136356A1 (en) Aluminium-copper-lithium products
CN102021457B (en) High-toughness aluminum lithium alloy and preparation method thereof
CN102459671B (en) Aluminium-copper-lithium alloy having improved mechanical strength and improved toughness
US10501833B2 (en) Aluminum alloy for producing semi-finished products or components for motor vehicles, method for producing an aluminium alloy strip from said aluminium alloy, and aluminium alloy strip and uses therefore
CN104805319B (en) Manufacturing method for 2xxx series ultra-large-dimension aluminum alloy round ingot
CN100547098C (en) A kind of Al-zn-mg-cu alloy
CN102796925B (en) High-strength die-casting aluminum alloy for pressure casting
WO2015169163A1 (en) Aluminum alloy and method of preparing the same
CN101967588B (en) Damage-resistant aluminum-lithium alloy and preparation method thereof
CN105132772B (en) Low-cost non-rare-earth type high-strength magnesium alloy and preparing method thereof
CN103103413B (en) A kind of smelting preparation method of high-strength aluminum alloy section
ES2344213T3 (en) Products made of aluminum alloys of high tenacity and manufacturing procedure.
CN105296818A (en) Aluminum alloy and preparation method and application thereof
CN105441737A (en) High-strength high-corrosion-resistance cast aluminum alloy and gravity casting manufacturing method thereof
Fan Development of the rheo-diecasting process for magnesium alloys
CN103484737B (en) Aluminum alloy digital electronic product case and application thereof
CN105543595B (en) High intensity, high formability, inexpensive aluminum-copper-lithium alloys
CN100564571C (en) Production method with product that the aluminium alloy of high tenacity and high-fatigue strength makes

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant