CN105154729A - Cast aluminum-zinc-magnesium-copper-tantalum alloy and manufacturing method thereof - Google Patents
Cast aluminum-zinc-magnesium-copper-tantalum alloy and manufacturing method thereof Download PDFInfo
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Abstract
Cast aluminum-zinc-magnesium-copper-tantalum alloy is formed by following ingredients, by weight percentage, of 0.02-0.51% of Ta, 1.5-3% of Mg, 1.5-2.5% of Cu, 6-10% of Zn, 0.0004-0.0102% of cerium-enriched mischmetal and the balance of Al. The invention also provides a manufacturing method for the cast aluminum-zinc-magnesium-copper-tantalum alloy. According to the cast aluminum-zinc-magnesium-copper-tantalum alloy, tantalum element is dissolved in aluminum grain in an atom manner along with magnesium element and copper element in a solid manner to generate a solid solution strengthening function. Furthermore, TaAl3-xZnx particles are formed and dispersed in an aluminum base body to generate a dispersion strengthening function. The particles have strong nucleation ability on aluminum grain, the aluminum grain is refined, and a refined crystalline strengthening effect is generated. The refined crystalline strengthening effect can enable zinc, magnesium, copper and compound to be distributed more evenly, microcosmic ingredient segregation is reduced, and the alloy strength is further improved.
Description
Technical field
The present invention relates to a kind of cast aluminum-molykote composite material-zinc-magnesium-copper-tantalum alloy containing Ta element and preparation method thereof, belong to metal alloy compositions technical field.
background technology
7XXX system Al-Zn-Mg-Cu alloy is wider in field application such as aerospace, vehicle, machineries as a class high strength alumin ium alloy.But for obtaining desirable weave construction and high mechanical property, the plastic histories (therefore being called wrought aluminium alloy) such as this kind of alloy needs to carry out to extrude, forging, need complicated production dress to put forth energy and production process and longer production cycle, therefore production cost is high.And casting alloy has that production technique is simple, performance and organize isotropy, be easy to produce the advantages such as complex-shaped product, but the mechanical property relative deformation aluminium alloys such as intensity are much lower.Therefore, the performance improving cast aluminum-molykote composite material-zinc-magnesium-copper alloy has important actual application value.
Summary of the invention
For above technical problem, the invention provides cast aluminum-molykote composite material-zinc-magnesium-copper-tantalum alloy that a kind of Determination of Trace Tantalum element and cerium-rich mischmetal carry out alloying and obtain (because cerium-rich rare earth constituent content is few, at this not in embodiment), adding of tantalum element makes this casting alloy performance be greatly enhanced, and present invention also offers the preparation method of this alloy.
A kind of cast aluminum-molykote composite material-zinc-magnesium-copper-tantalum alloy, be made up of the constituent element of following mass percent: Ta0.02-0.51%, Mg1.5-3%, Cu1.5-2.5%, Zn6-10%, cerium-rich mischmetal 0.0004-0.0102%, all the other are Al.
Composition and the mass percentage of described cerium-rich mischmetal are as follows: Ce60%, La25%, Pr4%, Nd10%, and all the other are impurity.
The preparation method of cast aluminum-molykote composite material-zinc-magnesium-copper-tantalum alloy provided by the invention, is prepared from by following steps:
(1) according to take the following raw material of respective quality for the chemical composition and quality preparing aluminium-zinc-magnesium-copper-tantalum alloy: fine aluminium (purity 99.7wt.% or more), Al-50wt.%Zn master alloy, Al-50wt.%Cu master alloy, Al-40wt.%Mg master alloy, Al-15wt.%Ta master alloy;
(2) fine aluminium, Al-50wt.%Zn master alloy, Al-50wt.%Cu master alloy are put into crucible and melted, alloy melt temperature adds Al-40wt.%Mg alloy after being adjusted to 690-740 DEG C, stirring melt makes alloying constituent even, then adds refining agent and carry out refining; While above process, by Al-Ta master alloy in 100-200 DEG C of preheating 60-200 minute, for subsequent use;
Described refining agent is purchased from Central China, Xuzhou Aluminum company limited, and model is HZ-WYJ;
(3) the Al-Ta master alloy after preheating is added in the molten aluminium after above-mentioned refining, be incubated after 8-25 minute and stir, then pour in mould, after cooling, obtain as cast condition aluminium-zinc-magnesium-copper-tantalum alloy.
(4) above as cast condition aluminium-zinc-magnesium-copper-tantalum alloy is heat-treated according to the following steps: aluminium-zinc-magnesium-copper-tantalum alloy is taken out in 450-480 DEG C of insulation and puts into water at once after 4-6 hour in electric furnace and quenches; Alloy after quenching is put into electric furnace in 140-180 DEG C of insulation 15-25 hour again, then take out and be placed in air naturally cooling, obtain heat treatment state aluminium-zinc-magnesium-copper-tantalum alloy.
The composition of described Al-Ta master alloy is: Ta15wt.%, cerium-rich mischmetal 0.3wt.%, and all the other are Al.Ta element is mainly with TaAl
3the mode of compound particles is embedded in aluminum substrate; TaAl
3compound particles is polyhedron or spherical, and size of particles is less than 3 microns.
Described Al-15wt.%Ta master alloy prepares by the following method:
(1) raw material fine aluminium, cerium-rich mischmetal and K is taken by the mass ratio of 0.8875:0.003:0.32535
2taF
7;
(2) fine aluminium is melted in smelting furnace 690-740 DEG C of scope, adds cerium-rich mischmetal and stir melt and make uniform composition after its fusing;
(3) by K
2taF
7divide 5 batches to add in above-mentioned molten aluminium to react, after every batch reaction 5-15 minute, add next batch again, in reaction process, stir melt with carbon-point with the rotating speed of 100 revs/min;
(4) K
2taF
7all add and after reacting, the liquid that alloy melt upper strata is different from metal melt poured out, then residual Al alloy melt is poured in cooling die, after cooling, namely obtain Al-15wtTa master alloy.
The above Al-50wt.%Zn master alloy, Al-50wt.%Cu master alloy, Al-40wt.%Mg master alloy can be buied in market.
No matter cast aluminum-molykote composite material-zinc-magnesium-copper-tantalum alloy provided by the invention is as cast condition or heat treatment state, and tantalum element can significantly improve the strength property of alloy.The performance requriementss such as the intensity in can using according to reality, select the alloy of as cast condition or heat treatment state.
In alloy provided by the invention, tantalum element is jointly solid-solution in aluminium grain with magnesium, copper in an atomic manner and produces solution strengthening effect, also forms TaAl
3-xzn
xparticle dispersion is distributed in aluminum substrate and produces dispersion-strengthened action, and this particle has very strong nucleation ability to aluminium grain, makes aluminium grain obtain refinement, produces refined crystalline strengthening effect.Above Grain Refinement Effect also makes zinc, magnesium, copper and compound thereof be more evenly distributed, and reduces micro components segregation, further increases alloy strength.Tantalum element adds in the mode of the Al-Ta master alloy containing cerium-rich rare earth element, and rare earth element has surfactivity, makes TaAl
3-xzn
xparticle is easy to be uniformly dispersed, and improves nucleation ability.
Embodiment
Below by specific embodiment, the present invention is further elaborated, it should be noted that, following embodiment is only to explain the present invention, does not limit summary of the invention.
Prepare the Al-zn-mg-cu alloy not containing tantalum element by preparation method of the present invention, to contrast with embodiment, investigate the strengthening effect of tantalum element.
The alloy property prepared in comparative example and embodiment is listed in table 1.Can find out, the alloy ratio containing tantalum element in the present invention does not all have higher tensile strength containing the alloy (both are under identical as-heat-treated condition) of tantalum element, shows that adding of tantalum element serves strengthening effect.
comparative example:
Aluminium-zinc-magnesium-copper-tantalum alloy composition: Ta0%, Mg2.4%, Cu2.2%, Zn8%, all the other are Al and inevitable impurity element.
The preparation process of above-mentioned aluminium-zinc-magnesium-copper-tantalum alloy is:
(1) according to take the following raw material of respective quality for the chemical composition and quality preparing aluminium-zinc-magnesium-copper-tantalum alloy: fine aluminium (purity 99.7wt.% or more), Al-50wt.%Zn master alloy, Al-50wt.%Cu master alloy, Al-40wt.%Mg master alloy;
(2) fine aluminium, Al-50wt.%Zn master alloy, Al-50wt.%Cu master alloy are put into crucible and melted, alloy melt temperature adds Al-40wt.%Mg alloy after being adjusted to 710 DEG C, stirs melt and makes alloying constituent even, then adds refining agent and carry out refining;
(3) above as cast condition Al-zn-mg-cu alloy is heat-treated according to the following steps: aluminium-zinc-magnesium-copper-tantalum alloy is taken out in 475 DEG C of insulations and puts into water at once after 4 hours in electric furnace and quenches.Alloy after quenching is put into electric furnace in 180 DEG C of insulations 15 hours again, then take out and be placed in air naturally cooling, obtain heat treatment state Al-zn-mg-cu alloy.
embodiment 1
Aluminium-zinc-magnesium-copper-tantalum alloy composition: Ta0.045%, Mg2.4%, Cu2.2%, Zn8%, cerium-rich mischmetal 0.0009%, all the other are Al and inevitable impurity element.
The preparation process of above-mentioned aluminium-zinc-magnesium-copper-tantalum alloy is:
(1) according to take the following raw material of respective quality for the chemical composition and quality preparing aluminium-zinc-magnesium-copper-tantalum alloy: fine aluminium (purity 99.7wt.% or more), Al-50wt.%Zn master alloy, Al-50wt.%Cu master alloy, Al-40wt.%Mg master alloy, Al-15wt.%Ta(contains 0.3% cerium-rich mischmetal) master alloy;
(2) fine aluminium, Al-50wt.%Zn master alloy, Al-50wt.%Cu master alloy are put into crucible and melted, alloy melt temperature adds Al-40wt.%Mg alloy after being adjusted to 710 DEG C, stirs melt and makes alloying constituent even, then adds refining agent and carry out refining; While above process, Al-15wt.%Ta(is contained 0.3% cerium-rich mischmetal) master alloy in 150 DEG C of preheatings 120 minutes, put forth energy use;
(3) the Al-15wt.%Ta master alloy after preheating is added in the molten aluminium after above-mentioned refining, be incubated after 10 minutes and stir, then pour in mould, after cooling, obtain as cast condition aluminium-zinc-magnesium-copper-tantalum alloy.
(4) above as cast condition aluminium-zinc-magnesium-copper-tantalum alloy is heat-treated according to the following steps: aluminium-zinc-magnesium-copper-tantalum alloy is taken out in 475 DEG C of insulations and puts into water at once after 4 hours in electric furnace and quenches.Alloy after quenching is put into electric furnace in 180 DEG C of insulations 15 hours again, then take out and be placed in air naturally cooling, obtain heat treatment state aluminium-zinc-magnesium-copper-tantalum alloy.
embodiment 2
Aluminium-zinc-magnesium-copper-tantalum alloy composition: Ta0.09%, Mg2.9%, Cu1.7%, Zn10%, cerium-rich mischmetal 0.0018%, all the other are Al and inevitable impurity element.
The preparation process of above-mentioned aluminium-zinc-magnesium-copper-tantalum alloy is:
(1) according to take the following raw material of respective quality for the chemical composition and quality preparing aluminium-zinc-magnesium-copper-tantalum alloy: fine aluminium (purity 99.7wt.% or more), Al-50wt.%Zn master alloy, Al-50wt.%Cu master alloy, Al-40wt.%Mg master alloy, Al-15wt.%Ta(contains 0.3% cerium-rich mischmetal) master alloy;
(2) fine aluminium, Al-50wt.%Zn master alloy, Al-50wt.%Cu master alloy are put into crucible and melted, alloy melt temperature adds Al-40wt.%Mg alloy after being adjusted to 720 DEG C, stirs melt and makes alloying constituent even, then adds refining agent and carry out refining; Meanwhile, by Al-15wt.%Ta master alloy in 180 DEG C of preheatings 80 minutes, put forth energy to use;
(3) the Al-15wt.%Ta master alloy after preheating is added in the molten aluminium after above-mentioned refining, be incubated after 15 minutes and stir, then pour in mould, after cooling, obtain as cast condition aluminium-zinc-magnesium-copper-tantalum alloy.
(4) above as cast condition aluminium-zinc-magnesium-copper-tantalum alloy is heat-treated according to the following steps: aluminium-zinc-magnesium-copper-tantalum alloy is taken out in 460 DEG C of insulations and puts into water at once after 6 hours in electric furnace and quenches.Alloy after quenching is put into electric furnace in 140 DEG C of insulations 24 hours again, then take out and be placed in air naturally cooling, obtain heat treatment state aluminium-zinc-magnesium-copper-tantalum alloy.
embodiment 3
Aluminium-zinc-magnesium-copper-tantalum alloy composition: Ta0.15%, Mg2.4%, Cu2.2%, Zn8%, cerium-rich mischmetal 0.003%, all the other are Al and inevitable impurity element.
The preparation process of above-mentioned aluminium-zinc-magnesium-copper-tantalum alloy is:
(1) according to take the following raw material of respective quality for the chemical composition and quality preparing aluminium-zinc-magnesium-copper-tantalum alloy: fine aluminium (purity 99.7wt.% or more), Al-50wt.%Zn master alloy, Al-50wt.%Cu master alloy, Al-40wt.%Mg master alloy, Al-15wt.%Ta(contains 0.3% cerium-rich mischmetal) master alloy;
(2) fine aluminium, Al-50wt.%Zn master alloy, Al-50wt.%Cu master alloy are put into crucible and melted, alloy melt temperature adds Al-40wt.%Mg alloy after being adjusted to 710 DEG C, stirs melt and makes alloying constituent even, then adds refining agent and carry out refining; While above process, by Al-15wt.%Ta master alloy in 150 DEG C of preheatings 150 minutes, put forth energy to use;
(3) the Al-15wt.%Ta master alloy after preheating is added in the molten aluminium after above-mentioned refining, be incubated after 20 minutes and stir, then pour in mould, after cooling, obtain as cast condition aluminium-zinc-magnesium-copper-tantalum alloy.
(4) above as cast condition aluminium-zinc-magnesium-copper-tantalum alloy is heat-treated according to the following steps: aluminium-zinc-magnesium-copper-tantalum alloy is taken out in 475 DEG C of insulations and puts into water at once after 4 hours in electric furnace and quenches.Alloy after quenching is put into electric furnace in 180 DEG C of insulations 15 hours again, then take out and be placed in air naturally cooling, obtain heat treatment state aluminium-zinc-magnesium-copper-tantalum alloy.
embodiment 4
Aluminium-zinc-magnesium-copper-tantalum alloy composition: Ta0.3%, Mg1.7%, Cu2.5%, Zn7%, cerium-rich mischmetal 0.006%, all the other are Al and inevitable impurity element.
The preparation process of above-mentioned aluminium-zinc-magnesium-copper-tantalum alloy is:
(1) according to take the following raw material of respective quality for the chemical composition and quality preparing aluminium-zinc-magnesium-copper-tantalum alloy: fine aluminium (purity 99.7wt.% or more), Al-50wt.%Zn master alloy, Al-50wt.%Cu master alloy, Al-40wt.%Mg master alloy, Al-15wt.%Ta(contains 0.3% cerium-rich mischmetal) master alloy;
(2) fine aluminium, Al-50wt.%Zn master alloy, Al-50wt.%Cu master alloy are put into crucible and melted, alloy melt temperature adds Al-40wt.%Mg alloy after being adjusted to 720 DEG C, stirs melt and makes alloying constituent even, then adds refining agent and carry out refining; While above process, by Al-15wt.%Ta master alloy in 150 DEG C of preheatings 120 minutes, put forth energy to use;
(3) the Al-15wt.%Ta master alloy after preheating is added in the molten aluminium after above-mentioned refining, be incubated after 20 minutes and stir, then pour in mould, after cooling, obtain as cast condition aluminium-zinc-magnesium-copper-tantalum alloy.
(4) above as cast condition aluminium-zinc-magnesium-copper-tantalum alloy is heat-treated according to the following steps: aluminium-zinc-magnesium-copper-tantalum alloy is taken out in 450 DEG C of insulations and puts into water at once after 6 hours in electric furnace and quenches.Alloy after quenching is put into electric furnace in 160 DEG C of insulations 19 hours again, then take out and be placed in air naturally cooling, obtain heat treatment state aluminium-zinc-magnesium-copper-tantalum alloy.
embodiment 5
Aluminium-zinc-magnesium-copper-tantalum alloy composition: Ta0.45%, Mg2.4%, Cu2.2%, Zn8%, cerium-rich mischmetal 0.009%, all the other are Al and inevitable impurity element.
The preparation process of above-mentioned aluminium-zinc-magnesium-copper-tantalum alloy is:
(1) according to take the following raw material of respective quality for the chemical composition and quality preparing aluminium-zinc-magnesium-copper-tantalum alloy: fine aluminium (purity 99.7wt.% or more), Al-50wt.%Zn master alloy, Al-50wt.%Cu master alloy, Al-40wt.%Mg master alloy, Al-15wt.%Ta(contains 0.3% cerium-rich mischmetal) master alloy;
(2) fine aluminium, Al-50wt.%Zn master alloy, Al-50wt.%Cu master alloy are put into crucible and melted, alloy melt temperature adds Al-40wt.%Mg alloy after being adjusted to 720 DEG C, stirs melt and makes alloying constituent even, then adds refining agent and carry out refining; While above process, Al-15wt.%Ta(is contained 0.3% cerium-rich mischmetal) master alloy in 150 DEG C of preheatings 120 minutes, put forth energy use;
(3) the Al-15wt.%Ta master alloy after preheating is added in the molten aluminium after above-mentioned refining, be incubated after 20 minutes and stir, then pour in mould, after cooling, obtain as cast condition aluminium-zinc-magnesium-copper-tantalum alloy.
(4) above as cast condition aluminium-zinc-magnesium-copper-tantalum alloy is heat-treated according to the following steps: aluminium-zinc-magnesium-copper-tantalum alloy is taken out in 475 DEG C of insulations and puts into water at once after 4 hours in electric furnace and quenches.Alloy after quenching is put into electric furnace in 170 DEG C of insulations 16 hours again, then take out and be placed in air naturally cooling, obtain heat treatment state aluminium-zinc-magnesium-copper-tantalum alloy.
Table 1, the tensile strength values of prepared aluminium-zinc-magnesium-copper-tantalum alloy in comparative example and embodiment.
。
Claims (4)
1. cast aluminum-molykote composite material-zinc-magnesium-copper-tantalum alloy, it is characterized in that, be made up of: Ta0.02-0.51%, Mg1.5-3%, Cu1.5-2.5%, Zn6-10% the constituent element of following mass percentage, cerium-rich mischmetal 0.0004-0.0102%, all the other are Al;
Composition and the mass percentage of described cerium-rich mischmetal are as follows: Ce60%, La25%, Pr4%, Nd10%, and all the other are impurity.
2. aluminium-zinc-magnesium-copper-tantalum alloy according to claim 1, it is characterized in that, be made up of: Ta0.45%, Mg2.4%, Cu2.2%, Zn8% the constituent element of following mass percentage, cerium-rich mischmetal 0.009%, all the other are Al.
3. a preparation method for the cast aluminum-molykote composite material-zinc-magnesium-copper-tantalum alloy described in claim 1 or 2, is characterized in that, be prepared from by following steps:
1) following raw material is taken according to the mass percentage quality of aluminium-zinc-magnesium-each constituent element of copper-tantalum alloy: fine aluminium, Al-50wt.%Zn master alloy, Al-50wt.%Cu master alloy, Al-40wt.%Mg master alloy, Al-15wt.%Ta master alloy;
2) fine aluminium, Al-50wt.%Zn master alloy, Al-50wt.%Cu master alloy are put into crucible and melted, alloy melt temperature adds Al-40wt.%Mg alloy after being adjusted to 690-740 DEG C, stirring melt makes alloying constituent even, then adds refining agent and carry out refining; While above process, by Al-15wt.%Ta master alloy in 100-200 DEG C of preheating 60-200 minute, for subsequent use;
3) the Al-15wt.%Ta master alloy after preheating is added in the molten aluminium after above-mentioned refining, be incubated after 8-25 minute and stir, then pour in mould, after cooling, obtain as cast condition aluminium-zinc-magnesium-copper-tantalum alloy;
4)above as cast condition aluminium-zinc-magnesium-copper-tantalum alloy is heat-treated according to the following steps: aluminium-zinc-magnesium-copper-tantalum alloy is taken out in 450-480 DEG C of insulation and puts into water at once after 4-6 hour in electric furnace and quenches; Alloy after quenching is put into electric furnace in 140-180 DEG C of insulation 15-25 hour again, then take out and be placed in air naturally cooling, obtain heat treatment state aluminium-zinc-magnesium-copper-tantalum alloy.
4. preparation method according to claim 3, is characterized in that, the composition of described Al-Ta master alloy is: Ta15wt.%, cerium-rich mischmetal 0.3wt.%, and all the other are Al; Ta element is with TaAl
3the mode of compound particles is embedded in aluminum substrate; TaAl
3compound particles is polyhedron or spherical, and size of particles is less than 3 microns.
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| CN109252076B (en) * | 2018-11-13 | 2020-10-27 | 中南大学 | Ta-containing stress corrosion resistant Al-Zn-Mg- (Cu) alloy and preparation method thereof |
| CN110449578A (en) * | 2019-07-02 | 2019-11-15 | 广东工业大学 | A kind of 7050 aluminium alloy 3D printing precinct laser fusion drip molding of high-performance and its application |
| CN110423965A (en) * | 2019-07-12 | 2019-11-08 | 广东工业大学 | A kind of heat treatment method of the 7050 aluminium alloy 3D printing molded parts containing Ta |
| CN116219239A (en) * | 2023-01-04 | 2023-06-06 | 福建煜雄科技有限公司 | Anti-fatigue composite metal material and preparation method thereof |
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