A kind of 6042 aluminium alloys and preparation method thereofTechnical field
The present invention relates to a kind of aluminium alloy and preparation method thereof, particularly relate to a kind of 6042Aluminium alloy and preparation method thereof, belongs to field of metallurgy.
Background technology
6000 line aluminium alloys are current widely used alloys, and it with magnesium and silicon isMain, with Mg2Si is main hardening constituent, has moderate strength, corrosion resistance and good, welderingConnect the features such as performance extrusion molding good, easy, heat-tinting performance be good, it is adaptable to garageOutside the automobiles such as Lee's frame, door, window, vehicle body, fin and various ornamental strip, decorationGadget.
But, the aspect poor-performing such as aluminum alloy surface hardness, mar proof, in order to fullFoot uses demand, needs to carry out surface process, and bright anodizing process is at present shouldWith more extensively and more successfully a kind of process for treating surface.Aluminium alloy is through bright anodizingProcess the anode oxide film obtained not only strong with the adhesion of alloy matrix aluminum, and haveThe performances such as preferable presentation quality, corrosion resistance and high temperature resistance cracking behavior.It is applicable to preparation haveThe automobile exterior trimming parts such as high glaze, the ornamental strip of high anti-corrosion requirement, decoration, as " BMW ",The automobile exterior trimming parts of superior automobile such as " run quickly ".But, the outward appearance matter of anode oxide filmThe performance such as amount, corrosion resistance and high temperature resistance cracking behavior, all with the organizational structure of alloy matrix aluminumThere is direct relation.And conventional in 6000 line aluminium alloys, as 6063 aluminium alloys,6061 aluminium alloys can not meet bright anodizing requirement, because bright anodizingEasily expose the fine defects within alloy.
About the aluminum alloy materials for bright anodizing, prior art has been reported.As American-European countries uses higher 6401 aluminium alloys of standard-required for bright anodizing.But, domestic firsthand 6401 aluminium alloys do not reach general international standard, for lightBright anodic oxidation produces and there is the defects such as serious white line, pit and aberration, once oxidationQualification rate, less than 10%, drastically influence the delivery progress of product and the economic benefit of enterprise.Although Chinese invention patent (publication number: CN102676892A) discloses a kind of 6401Aluminium alloy and its production and use, 6401 aluminium alloys that this patent melting obtains forBright anodizing produces suppression or eliminates the defects such as white line, pit and aberration so thatThe volume production presentation quality of 6401 aluminium alloy bright anodizing products reaches requirement.But,The time of this patent smelting aluminium alloy is longer, and the production cost of aluminium alloy is higher, have compressedThe profit margin of enterprise.On the other hand, after 6401 alloy product oxidations, glossiness is550-650, it is impossible to meet client's demand to other glossiness.
Summary of the invention
It is an object of the invention to for the above-mentioned problems in the prior art, it is proposed that onePlant 6042 aluminum that smelting time is short, low cost, bright anodizing effect meet demand to closeGold.
The purpose of the present invention can be realized by following technical proposal: a kind of 6042 aluminium alloys,Described aluminium alloy is become to be grouped into by following mass percent: Si:0.38-0.48%, Cu:0.06-0.12%, Mn:0.01-0.05%, Mg:0.50-0.60%, Cr:0.01-0.03%,Zn:0.03-0.08%, Ti:0.01-0.03%, Fe≤0.08%, rare earth element:0.001-0.002%, surplus is Al and inevitable impurity element, wherein, single miscellaneousPrime element content≤0.02%, total impurities constituent content≤0.15%.
As preferably, the content of Fe element controls at 0.06-0.08%.Fe is aluminium alloyIn generally acknowledge objectionable impurities, the mechanical performance of aluminium alloy, meanwhile, Fe element meeting can be reducedOxidation effectiveness is impacted.Therefore, in order to ensure the mechanical performance of aluminium alloy, this ShenFurther preferably the content of Fe element please be controlled at 0.06-0.08%.
It addition, the present invention is while controlling Fe content, aluminium alloy is also added with traceMn element, for reducing the adverse effect of Fe.Meanwhile, the present invention is also added with traceZn element, for improving the mobility of alloy solution, improves the casting character of aluminium alloy.
And the Cr element of trace can form (CrFe) Al in aluminium alloy7With(CrMn)Al12Deng intermetallic compound, hinder forming core and the growth process of recrystallization, rightAluminium alloy has certain invigoration effect, moreover it is possible to improve alloy ductility and reduction stress corrosion is openedSplit sensitivity.
Additionally, the rare earth element of trace can play the effect of microalloying, moreover it is possible to permittedThe most nonmetal have stronger affinity, can generate the compound that fusing point is high, has certain essenceRefining, purification.At the same time it can also be optionally adsorb on the crystal grain boundary grown up,Hinder the growth of crystal grain, make crystal grain refine, reduce the crystallite dimension after casting, thus carryThe performances such as the intensity of high-aluminium alloy, wearability and corrosion resistance.
Therefore, the standard-required of the present invention 6042 aluminium alloy is higher, the group of alloy matrix aluminumKnit structure preferable, produce for bright anodizing and can suppress or eliminate white line, pitAnd the defect such as aberration, there is the property such as preferable presentation quality, corrosion resistance and high temperature resistance cracking behaviorEnergy.
In above-mentioned one 6042 aluminium alloy, described rare earth element is La, Ce, Pr,One or more in Nd, Pm, Sm or Eu.The rare earth element of the present invention is further preferredFor LREE, to reduce the cost of the present invention 6042 aluminium alloy.
Another object of the present invention is to provide the preparation method of above-mentioned 6042 aluminium alloys, instituteState preparation method to comprise the following steps:
S1, high purity extractive aluminium ingot by 99.99% and the aluminium ingot Han Fe are placed in aluminium melting furnace and addHeat is fused into aluminum liquid to 730-740 DEG C, and adds Si, Cu, Mn, Cr, Zn, Ti element；
S2, in smelting furnace aluminium alloy, add refining agent refine, and carry out process of skimming；
S3, in smelting furnace aluminum liquid, add Mg element, rare earth element by setting requirement contentAnd remaining Si, Cu, Mn, Cr, Zn element；
S4, smelting furnace aluminum liquid is passed through argon carries out refine, and carry out process of skimming；
S5, by smelting furnace aluminum liquid stand 60-80min；
S6, by the aluminum liquid in described aluminium melting furnace through aluminum liquid stream road with set unit intervalFlow guides casting furnace, the first flows per unit time according to aluminum liquid in runner into, wants by settingContent is asked to be continuously added to remain Ti element in aluminum liquid stream road；Then aluminum liquid is introduced online essencePractice stove and be again passed through argon carry out insulation refine degasification；Again the aluminum liquid through refine again is drawnEnter on-line filtration device and carry out on-line filtration, be finally introducing crystallizer and cast, it is thus achieved that aluminumRod.
In the preparation method of 6042 above-mentioned aluminium alloys, Si described in step S1, Cu,Mn, Cr, Zn, Ti element adds with the form of intermediate alloy or the form of the gold that isozygotys,Addition is the 70-85% of desired value.In fusion process, it is previously added metallic element,Can not only more preferable control composition, it is also possible to when shortening the wait of follow-up interpolation metallic elementBetween, to reduce the production cost of aluminium alloy.
In the preparation method of 6042 above-mentioned aluminium alloys, the aluminium ingot Han Fe described in step S1The content of middle Fe is 0.05-0.15%, the high purity extractive aluminium ingot of described 99.99% and the aluminium ingot Han FeWeight ratio be (2-3): 1.In prior art, in order to control the iron content in aluminium alloy,It is typically chosen employing high purity extractive aluminium ingot and the mode of chalybeate congruent melting, but, the fusing of ferrum needsWant the regular hour.And use high purity extractive aluminium ingot and the aluminium ingot Han Fe of the present invention 99.99%The mode of congruent melting, then without the concern for the fusing time of ferrum, thus shorten smelting time, fallLow being smelted into this, meanwhile, the distribution making Fe element is more uniform.
In the preparation method of 6042 above-mentioned aluminium alloys, step S6 remains Ti elementAdd with Al-Ti-C master alloy fining agent form.Al-Ti-C master alloy fining agent, such as:AlTi3C0.15, AlTi5C0.2, AlTi5C0.3, AlTi5C0.5 etc., close in the middle of theseThe most costly, therefore, the present invention is previously added the price of gold fining agent in step slPartial-titanium element, preferably adds with the form of titanium alloy, closes in the middle of aluminum titanium carbon to reduceThe usage amount of gold fining agent, thus reduce the production cost of 6042 aluminium alloys.
In the preparation method of 6042 above-mentioned aluminium alloys, online mistake described in step S6Filter device includes that the leaf filter of 40-60 mesh and the ceramic pipe type of 70-120 mesh filterDevice.Aluminum liquid is re-introduced into crystallizer after twice filtration and casts, effectively by the present inventionFilter out the alloy being mingled with, it is to avoid pit occurs in aluminium alloy, more preferably improve aluminium alloy lightAnodised effect.
In the preparation method of 6042 above-mentioned aluminium alloys, described aluminum liquid is first through 40-60 meshLeaf filter filter after again through 70-120 mesh ceramic pipe type filter filter.
In the preparation method of 6042 above-mentioned aluminium alloys, step S6 casts the aluminum obtainedRod also carries out heat treatment, and described heat treatment process for being heated to 550-570 DEG C of guarantor by aluminium barCool down after temperature 6-10h.
In the preparation method of 6042 above-mentioned aluminium alloys, described cooling procedure includes instituteState aluminium bar and be placed in cooling chamber first cooling 30-60min in high wind, then drench cooling with cold waterTo room temperature.Prior art is cooled to natural cooling, the precipitation again dissolving phase can be caused.And the strong wind cooling that the present invention uses, strengthen cooling effect, can retain to a greater extentSolid solution structure, does for subsequent product mechanical property and ensures.
Compared with prior art, the method have the advantages that
1. the standard-required of the present invention 6042 aluminium alloy is higher, controls Fe element furtherContent, with the addition of Mn, Zn, Cr and the rare earth element of trace, the tissue of alloy matrix aluminumStructure is preferable, produces for bright anodizing and can suppress or eliminate white line, pit and colorThe defects such as difference, have the performances such as preferable presentation quality, corrosion resistance and high temperature resistance cracking behavior.
2. the present invention uses the high purity extractive aluminium ingot of 99.99% and the side containing Fe aluminium ingot congruent meltingFormula, it is no longer necessary to consider the fusing time of ferrum, thus shorten smelting time, and in meltingDuring be previously added alloy part element, not only make Elemental redistribution more uniform, alsoShorten the alloy melting time, reduce the production cost of 6042 aluminium alloys.
3. after the oxidation of the present invention 6042 alloy product, glossiness is 350-450, thus canDemand with satisfied different clients.
Accompanying drawing explanation
Fig. 1 is 6042 aluminium alloy metallographs obtained by the embodiment of the present invention 3.
Fig. 2 is the aluminium alloy metallograph obtained by comparative example 1 of the present invention.
Detailed description of the invention
The following is the specific embodiment of the present invention, and the technology that accompanying drawings is to the present inventionScheme is further described, but the present invention is not limited to these embodiments.
Table 1: 6042 aluminium alloys of embodiment of the present invention 1-5Constituent and mass percent thereof
Embodiment 1:
By the constituent of 6042 aluminium alloys of embodiment 1 in table 1 and mass percent thereofIt is (2-3) by weight ratio: the high purity extractive aluminium ingot of the 99.99% of 1 and the content of Fe areThe aluminium ingot containing Fe of 0.05-0.15% is placed in aluminium melting furnace and is heated to 730-740 DEG C and is fused intoAluminum liquid, and add in aluminum silicon intermediate alloy, aluminum bronze intermediate alloy, alumin(i)um zinc alloy, manganese aluminumBetween alloy, evanohm and titanium alloy, adding of Si, Cu, Mn, Cr, Zn, Ti elementEnter the 70-85% that amount is desired value.Then in smelting furnace aluminium alloy, add refining agent refine,And carry out process of skimming.
In smelting furnace aluminum liquid, remaining aluminum silicon is added by setting requirement content after taking off Slag treatmentIntermediate alloy, aluminum bronze intermediate alloy, alumin(i)um zinc alloy, manganese aluminium intermediate alloy and evanohm,It is subsequently adding essence magnesium and aluminum lanthanum alloy, takes in smelting furnace with spoon and survey after the cooling of aluminum liquid sampleThe content of fixed each element, and mend with the difference condition requiring content according to measurement resultRepay fine setting.Then in smelting furnace aluminum liquid, it is passed through argon carry out refine again and take off Slag treatment,And stand 60-80min.
After standing, the aluminum liquid in aluminium melting furnace is flowed with the unit interval set through aluminum liquid stream roadAmount guides casting furnace, the first flows per unit time according to aluminum liquid in runner into, wants by settingAsk content to be continuously added to Al-Ti-C master alloy fining agent in aluminum liquid stream road, make Ti elementContent reaches setting value.Then aluminum liquid introduced online concise stove and be again passed through argon and enterRow insulation refine；Again the aluminum liquid through refine again is introduced on-line filtration device to carry out onlineFiltering, on-line filtration includes passing through after the leaf filter of 40-60 mesh filters againThe ceramic pipe type filter of 70-120 mesh filters.It is finally introducing crystallizer to cast, obtainsObtain aluminium bar.
Aluminium bar casting obtained carries out heat treatment, is heated to 550 DEG C of insulation 10h, thenAluminium bar is placed in cooling chamber in high wind, first cools down 30min, then be cooled to room with cold water pouringTemperature, obtains the present invention 6042 aluminium alloy.
By above-mentioned 6042 prepared aluminium alloys again through extruding, machine add shaping, mechanical polishing,The operations such as anodic oxidation, obtain the automobile exterior trimming parts of bright anodizing.
Embodiment 2:
By the constituent of 6042 aluminium alloys of embodiment 2 in table 1 and mass percent thereofIt is (2-3) by weight ratio: the high purity extractive aluminium ingot of the 99.99% of 1 and the content of Fe areThe aluminium ingot containing Fe of 0.05-0.15% is placed in aluminium melting furnace and is heated to 730-740 DEG C and is fused intoAluminum liquid, and add in aluminum silicon intermediate alloy, aluminum bronze intermediate alloy, alumin(i)um zinc alloy, manganese aluminumBetween alloy, evanohm and titanium alloy, adding of Si, Cu, Mn, Cr, Zn, Ti elementEnter the 70-85% that amount is desired value.Then in smelting furnace aluminium alloy, add refining agent refine,And carry out process of skimming.
In smelting furnace aluminum liquid, remaining aluminum silicon is added by setting requirement content after taking off Slag treatmentIntermediate alloy, aluminum bronze intermediate alloy, alumin(i)um zinc alloy, manganese aluminium intermediate alloy and evanohm,It is subsequently adding essence magnesium and aluminum lanthanum alloy, takes in smelting furnace with spoon and survey after the cooling of aluminum liquid sampleThe content of fixed each element, and mend with the difference condition requiring content according to measurement resultRepay fine setting.Then in smelting furnace aluminum liquid, it is passed through argon carry out refine again and take off Slag treatment,And stand 60-80min.
After standing, the aluminum liquid in aluminium melting furnace is flowed with the unit interval set through aluminum liquid stream roadAmount guides casting furnace, the first flows per unit time according to aluminum liquid in runner into, wants by settingAsk content to be continuously added to Al-Ti-C master alloy fining agent in aluminum liquid stream road, make Ti elementContent reaches setting value.Then aluminum liquid introduced online concise stove and be again passed through argon and enterRow insulation refine；Again the aluminum liquid through refine again is introduced on-line filtration device to carry out onlineFiltering, on-line filtration includes passing through after the leaf filter of 40-60 mesh filters againThe ceramic pipe type filter of 70-120 mesh filters.It is finally introducing crystallizer to cast, obtainsObtain aluminium bar.
Aluminium bar casting obtained carries out heat treatment, is heated to 555 DEG C of insulation 7h, thenAluminium bar is placed in cooling chamber in high wind, first cools down 40min, then be cooled to room with cold water pouringTemperature, obtains the present invention 6042 aluminium alloy.
By above-mentioned 6042 prepared aluminium alloys again through extruding, machine add shaping, mechanical polishing,The operations such as anodic oxidation, obtain the automobile exterior trimming parts of bright anodizing.
Embodiment 3:
By the constituent of 6042 aluminium alloys of embodiment 3 in table 1 and mass percent thereofIt is (2-3) by weight ratio: the high purity extractive aluminium ingot of the 99.99% of 1 and the content of Fe areThe aluminium ingot containing Fe of 0.05-0.15% is placed in aluminium melting furnace and is heated to 730-740 DEG C and is fused intoAluminum liquid, and add in aluminum silicon intermediate alloy, aluminum bronze intermediate alloy, alumin(i)um zinc alloy, manganese aluminumBetween alloy, evanohm and titanium alloy, adding of Si, Cu, Mn, Cr, Zn, Ti elementEnter the 70-85% that amount is desired value.Then in smelting furnace aluminium alloy, add refining agent refine,And carry out process of skimming.
In smelting furnace aluminum liquid, remaining aluminum silicon is added by setting requirement content after taking off Slag treatmentIntermediate alloy, aluminum bronze intermediate alloy, alumin(i)um zinc alloy, manganese aluminium intermediate alloy and evanohm,It is subsequently adding essence magnesium and aluminum lanthanum alloy, takes in smelting furnace with spoon and survey after the cooling of aluminum liquid sampleThe content of fixed each element, and mend with the difference condition requiring content according to measurement resultRepay fine setting.Then in smelting furnace aluminum liquid, it is passed through argon carry out refine again and take off Slag treatment,And stand 60-80min.
After standing, the aluminum liquid in aluminium melting furnace is flowed with the unit interval set through aluminum liquid stream roadAmount guides casting furnace, the first flows per unit time according to aluminum liquid in runner into, wants by settingAsk content to be continuously added to Al-Ti-C master alloy fining agent in aluminum liquid stream road, make Ti elementContent reaches setting value.Then aluminum liquid introduced online concise stove and be again passed through argon and enterRow insulation refine；Again the aluminum liquid through refine again is introduced on-line filtration device to carry out onlineFiltering, on-line filtration includes passing through after the leaf filter of 40-60 mesh filters againThe ceramic pipe type filter of 70-120 mesh filters.It is finally introducing crystallizer to cast, obtainsObtain aluminium bar.
Aluminium bar casting obtained carries out heat treatment, is heated to 560 DEG C of insulation 8h, thenAluminium bar is placed in cooling chamber in high wind, first cools down 50min, then be cooled to room with cold water pouringTemperature, obtains the present invention 6042 aluminium alloy.
By above-mentioned 6042 prepared aluminium alloys again through extruding, machine add shaping, mechanical polishing,The operations such as anodic oxidation, obtain the automobile exterior trimming parts of bright anodizing.
Embodiment 4:
By the constituent of 6042 aluminium alloys of embodiment 4 in table 1 and mass percent thereofIt is (2-3) by weight ratio: the high purity extractive aluminium ingot of the 99.99% of 1 and the content of Fe areThe aluminium ingot containing Fe of 0.05-0.15% is placed in aluminium melting furnace and is heated to 730-740 DEG C and is fused intoAluminum liquid, and add in aluminum silicon intermediate alloy, aluminum bronze intermediate alloy, alumin(i)um zinc alloy, manganese aluminumBetween alloy, evanohm and titanium alloy, adding of Si, Cu, Mn, Cr, Zn, Ti elementEnter the 70-85% that amount is desired value.Then in smelting furnace aluminium alloy, add refining agent refine,And carry out process of skimming.
In smelting furnace aluminum liquid, remaining aluminum silicon is added by setting requirement content after taking off Slag treatmentIntermediate alloy, aluminum bronze intermediate alloy, alumin(i)um zinc alloy, manganese aluminium intermediate alloy and evanohm,It is subsequently adding essence magnesium and aluminum lanthanum alloy, takes in smelting furnace with spoon and survey after the cooling of aluminum liquid sampleThe content of fixed each element, and mend with the difference condition requiring content according to measurement resultRepay fine setting.Then in smelting furnace aluminum liquid, it is passed through argon carry out refine again and take off Slag treatment,And stand 60-80min.
After standing, the aluminum liquid in aluminium melting furnace is flowed with the unit interval set through aluminum liquid stream roadAmount guides casting furnace, the first flows per unit time according to aluminum liquid in runner into, wants by settingAsk content to be continuously added to Al-Ti-C master alloy fining agent in aluminum liquid stream road, make Ti elementContent reaches setting value.Then aluminum liquid introduced online concise stove and be again passed through argon and enterRow insulation refine；Again the aluminum liquid through refine again is introduced on-line filtration device to carry out onlineFiltering, on-line filtration includes passing through after the leaf filter of 40-60 mesh filters againThe ceramic pipe type filter of 70-120 mesh filters.It is finally introducing crystallizer to cast, obtainsObtain aluminium bar.
Aluminium bar casting obtained carries out heat treatment, is heated to 565 DEG C of insulation 9h, thenAluminium bar is placed in cooling chamber in high wind, first cools down 55min, then be cooled to room with cold water pouringTemperature, obtains the present invention 6042 aluminium alloy.
By above-mentioned 6042 prepared aluminium alloys again through extruding, machine add shaping, mechanical polishing,The operations such as anodic oxidation, obtain the automobile exterior trimming parts of bright anodizing.
Embodiment 5:
By the constituent of 6042 aluminium alloys of embodiment 5 in table 1 and mass percent thereofIt is (2-3) by weight ratio: the high purity extractive aluminium ingot of the 99.99% of 1 and the content of Fe areThe aluminium ingot containing Fe of 0.05-0.15% is placed in aluminium melting furnace and is heated to 730-740 DEG C and is fused intoAluminum liquid, and add in aluminum silicon intermediate alloy, aluminum bronze intermediate alloy, alumin(i)um zinc alloy, manganese aluminumBetween alloy, evanohm and titanium alloy, adding of Si, Cu, Mn, Cr, Zn, Ti elementEnter the 70-85% that amount is desired value.Then in smelting furnace aluminium alloy, add refining agent refine,And carry out process of skimming.
In smelting furnace aluminum liquid, remaining aluminum silicon is added by setting requirement content after taking off Slag treatmentIntermediate alloy, aluminum bronze intermediate alloy, alumin(i)um zinc alloy, manganese aluminium intermediate alloy and evanohm,It is subsequently adding essence magnesium and aluminum lanthanum alloy, takes in smelting furnace with spoon and survey after the cooling of aluminum liquid sampleThe content of fixed each element, and mend with the difference condition requiring content according to measurement resultRepay fine setting.Then in smelting furnace aluminum liquid, it is passed through argon carry out refine again and take off Slag treatment,And stand 60-80min.
After standing, the aluminum liquid in aluminium melting furnace is flowed with the unit interval set through aluminum liquid stream roadAmount guides casting furnace, the first flows per unit time according to aluminum liquid in runner into, wants by settingAsk content to be continuously added to Al-Ti-C master alloy fining agent in aluminum liquid stream road, make Ti elementContent reaches setting value.Then aluminum liquid introduced online concise stove and be again passed through argon and enterRow insulation refine；Again the aluminum liquid through refine again is introduced on-line filtration device to carry out onlineFiltering, on-line filtration includes passing through after the leaf filter of 40-60 mesh filters againThe ceramic pipe type filter of 70-120 mesh filters.It is finally introducing crystallizer to cast, obtainsObtain aluminium bar.
Aluminium bar casting obtained carries out heat treatment, is heated to 570 DEG C of insulation 6h, thenAluminium bar is placed in cooling chamber in high wind, first cools down 60min, then be cooled to room with cold water pouringTemperature, obtains the present invention 6042 aluminium alloy.
By above-mentioned 6042 prepared aluminium alloys again through extruding, machine add shaping, mechanical polishing,The operations such as anodic oxidation, obtain the automobile exterior trimming parts of bright anodizing.
Comparative example 1:
Comparative example 1 differs only in embodiment 3, does not has in the aluminium alloy of comparative example 3There is interpolation rare earth element.
Embodiment 3 being contrasted with comparative example 1, Fig. 1 is the embodiment of the present invention 3 instituteThe 6042 aluminium alloy metallographs prepared, Fig. 2 is that the aluminum obtained by comparative example 1 of the present invention closesGold metallograph.It can be seen that the present invention adds the crystalline substance of 6042 aluminium alloys of rare earth elementGranularity is the finest and closely woven, and hardening constituent is ideal Dispersed precipitate, aluminium alloy metallographicOrganization factors is the most excellent, and oxidation defect is reduced to about the 80% of comparative example 1.
Comparative example 2:
Comparative example 2 is that Chinese invention patent (publication number: CN102676892A) is openOne 6401 aluminium alloy and its production and use.
6401 aluminum of 6042 aluminium alloys of embodiment of the present invention 1-5 with comparative example 2 are closedThe production cost of gold contrasts, and the production cost of the present invention 6042 aluminium alloy is 6401The 85-90% of aluminium alloy production cost.Two kinds of aluminium alloys are respectively used to bright anodizingProduce and all can suppress or eliminate the defects such as white line, pit and aberration, there is preferable outward appearanceThe performances such as quality, corrosion resistance and high temperature resistance cracking behavior.By the bright anode of two kinds of aluminium alloysOxidation product carries out luminance test, glossiness 550-650 after 6401 alloy products oxidations,Glossiness 350-450 after the oxidation of the present invention 6042 alloy product, such that it is able to meet differenceThe demand of client.
In above-described embodiment and alternative thereof, rare earth element can also is that Ce, Pr,One in Nd, Pm, Sm or Eu or La, Ce, Pr, Nd, Pm, Sm or EuMiddle multiple combination forms, and all adds with the alloy form of aluminium-rare-earth element.
Specific embodiment described herein is only to present invention spirit theory for exampleBright.Those skilled in the art can be to described specific embodimentMake various amendment or supplement or use similar mode to substitute, but without departing from the present inventionSpirit or surmount scope defined in appended claims.
Although the present invention having been made a detailed description and having quoted some specific embodiments as proof,But to those skilled in the art, as long as without departing from the spirit and scope of the present inventionIt is obvious for can making various changes or revise.