CN102703761A - Ce-Pr-containing zinc-aluminum alloy wire and production method thereof - Google Patents
Ce-Pr-containing zinc-aluminum alloy wire and production method thereof Download PDFInfo
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- CN102703761A CN102703761A CN2012100149591A CN201210014959A CN102703761A CN 102703761 A CN102703761 A CN 102703761A CN 2012100149591 A CN2012100149591 A CN 2012100149591A CN 201210014959 A CN201210014959 A CN 201210014959A CN 102703761 A CN102703761 A CN 102703761A
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Abstract
The invention relates to a multi-element zinc-aluminum alloy wire. The multi-element zinc-aluminum alloy wire comprises, by weight percent, 15%-69% of Al, 0.2-3% of Si, 0.1-5% of Mg, 0.01-0.7% of Ce, 0.01-0.2% of Pr, not more than 1% of added microelements, and the balance of Zn, wherein the two rare earth elements have a total amount of 0.02-0.76%. The zinc-aluminum alloy wire has a resistivity of 2.0-6.0 Mu omega/cm, a specific gravity of 3.18-5.69g/cm<3>, and an elongation of 10-25%. The multi-element zinc-aluminum alloy wire is widely applicable to ships, power towers, large storage tanks, underground pipelines and facilities such as tunnel frames, and has broad application prospect.
Description
Technical field
The present invention relates to a kind of polynary Zn-Al alloy wire and method of manufacture thereof, especially relate to Zn-Al alloy wire and the method for manufacture thereof of a kind of Ce of containing and Pr.
Background technology
As everyone knows, except that the minority precious metal, metallic substance can be with surrounding medium generation chemical reaction and electrochemical reaction and is corroded.Metallic corrosion has become the maximum harm of large-scale steel structure building, has a strong impact on its safe in utilization and life-span.In addition, the metallic surface receives various mechanical effects and the wearing and tearing that cause are also very serious.A large amount of hardwares lost efficacy because of corroding and wearing and tearing, and caused great waste and loss.According to some industrially developed country's statistics, annual steel account for 10% of steel ultimate production because of the loss of corroding and wearing and tearing cause, and the loss amount of money accounts for 2～4% of total value of production in national economy.Therefore, development protecting metallic surface and intensifying technology are the key subjects that various countries generally are concerned about.
Anti-corrosion method commonly used mainly adopts the method for chemical process and physics thermospray metallic coating.Chemical process mainly is meant and adopts anticorrosive coating coating etc., like coat composed erosion shields such as inorganic or organic varnishes; And be used for the thermospray metallic coating of anticorrosion purpose, thermospray metal coating layer material commonly used in the market is zinc and saxonia metal wire, its according to chemical composition difference be divided into: pure zinc silk, Zn-Al alloy wire ZnAl
5, Zn-Al alloy wire ZnAl
15Deng, they extensively are used in fields such as antiseptic project, surface treatment, capacitor end surface metal spraying.They mainly contain two to the protection mechanism of ferrous materials: the one, have the buffer action that similarly stops corrosive medium with the paint spraying anticorrosion mechanism; The 2nd, have the anodic protection effect that realizes through the coated material self-sacrifice; Therefore; The popularization and application on colliery, port and pier, large-sized civil steel building, bridge, high-speed railway, large ship and other large industrialized projects (like petrochemical industry, electric power, ocean) of thermospray metallic coating and compound coating guard technology thereof has obtained excellent society and economic benefit.
In the above-mentioned thermospray metal coating layer material, pure zinc silk is because of low price, and working method simply and is widely used.Yet its intensity and hardness are low, and tensile strength is low, and when as the anticorrosion with painting material, strength of materials hardness is low, and material is soft partially, flexible distortion.And Zn-Al alloy wire such as ZnAl
5, ZnAl
15Deng because complex manufacturing, production cost and material price are higher, so the purer zinc silk of consumption is few during as the anticorrosion with painting material.
In fact, another major cause of the less employing of Zn-Al alloy wire stretches easily broken exactly when producing filament and is difficult to carry out.Because raising along with aluminium content; Because because of the increase of component gap causes that segregation phenomena increases, be difficult to guarantee its homogeneous microstructure, resistance to deformation increases; So aluminium content is high more; It is difficult to be drawn into silk, thereby high aluminium content and drawing difficulty be a main difficult problem for preparing a material, and more the development of the Zn-Al alloy wire of high aluminium content does not appear in the newspapers yet.
To this problem, the someone proposes, and REE can significantly improve the physical and mechanical property of alloy in metal field, and REE has obtained extensive concern in the research in corrosion prevention field with using.Like Chinese patent CN1718836A; The rare earth cerium (Ce) that accounts for a material gross weight 0.05-0.3% is joined in Mg, the Al metal, make a kind of anticorrosive wire material sprayed with rare-earth aluminum-magnesium alloy, be used for the especially long-effective corrosion of hydro project gate of steelwork; Obtained positive protection effect; But what it adopted is to add single rare earth elemental cerium (Ce), thereby has influenced the further raising of silk material barrier propterty, is unfavorable for applying.And experiment shows, adopts the similar techniques scheme, and near down in limited time, for example when less than 0.08% the time, the rare earth role is extremely small like content of rare earth; And when greater than 0.1% the time, it is not obvious again that rare earth rises to the continuation of zinc alloy intensity, and therefore, this technical application is very limited, also fails in the Zn-Al alloy wire of effective application thermospray metallic coating.
So still need a kind of low price on the market, have the saxonia metal wire material that is used to make fields such as anticorrosion with painting engineering that replaces traditional zinc silk of higher-strength.
Summary of the invention
Deficiency to zinc silk in the prior art or the existence of zinc-aluminium silk; The object of the present invention is to provide a kind of polynary thermospray Zn-Al alloy wire and method of manufacture thereof; The polynary thermospray Zn-Al alloy wire that has not only successfully prepared high aluminium content; And successfully this material is sprayed at the surface of steel, obtained good preservative effect.
The present invention provides a kind of polynary Zn-Al alloy wire, weight percent meter, and its component is: aluminium Al:15%-69%; Silicon Si:0.2-3%; Magnesium Mg:0.1-5%; Cerium Ce:0.01-0.7%, praseodymium Pr:0.01-0.2%, the total amount of these two kinds of REEs: 0.02-0.76%, and total amount is no more than 1% trace additives; Surplus is zinc Zn, and the resistivity of said Zn-Al alloy wire is 2.0-6.0 μ Ω cm, and the proportion of said Zn-Al alloy wire is 3.18-5.69g/cm
3, the unit elongation 10-25% of said Zn-Al alloy wire.
Preferably, the total amount of wherein said two kinds of REEs: 0.30-0.72%, the resistivity of said Zn-Al alloy wire is 2.8-5.5 μ Ω cm, the proportion of said Zn-Al alloy wire is 3.50-4.94g/cm
3, the unit elongation 10-20% of said Zn-Al alloy wire.
Preferably, the diameter of wherein said Zn-Al alloy wire is 1.5-4.0mm, and the tensile strength of said Zn-Al alloy wire after 180-280 ℃ of annealing reached repeatedly drawing in 1.5-3 hour is 75-115Mpa.
Preferably, the mass ratio of wherein said two kinds of REEs is Ce/Pr=2/1～9/1.
Preferably, wherein the mass ratio of each composition is:
Si/Mg＝4/5～7/5，
Total amount=5/1～50/1 of two kinds of REEs of Si/,
Total amount=15/1～25/1 of two kinds of REEs of Mg/.
Preferably, the composition of each component is respectively by weight percentage in the wherein said trace additives: Fe＜0.01%, Pb＜0.005%, Cd＜0.002%, Sn＜0.001%.
On the other hand, the present invention also provides a kind of method for preparing said Zn-Al alloy wire, gets the raw materials ready according to the weight percent of said each component of Zn-Al alloy wire; Each component is made aluminium zinc by proportioning in smelting furnace, pour into the aluminium zinc rod through the deep-well forging type again, then; The aluminium zinc rod is put into 350～450 ℃ electric furnace 4～8 hours, carry out homogenizing and handle, use extrusion machine again; At 380～420 ℃ of following hot extrusion materials, make material pass through circular die, form the thick line base of diameter 4.5～8mm; With the thick line base in vacuum annealing furnace 180～280 ℃ annealing 1.5～3 hours; Carry out drawing, annealing again, and then repeat above drawing, annealed step successively, up to the silk material of processing 1.5～4.0mm.
Preferably, wherein drawing process is following: the thick line base of diameter 4.5～8mm is stretched to diameter 4.0mm～7.0mm, and then annealing; Again with the wire stretching of 4.0mm～7.0mm to 3.5mm～6.0mm, and then annealing; At last with wire stretching to 1.5～4.0mm of 3.5mm～6.0mm.
Preferably, the annealing temperature after wherein each drawing is 180～230 ℃, and annealing time is 1.5～3 hours.
Preferably, wherein the drawing speed of each passage is 10～35mm/min, and draft temperature is 20～30 ℃.
Adopt technical scheme of the present invention, obtained the technique effect of highly significant, specific as follows:
The zinc of Zn-Al alloy wire provides extraordinary anodic protection property, adds the oxidation that aluminium can reduce zinc in the zinc, improves the casting surface quality, and suppresses FeZn
7The formation of frangible compounds, simultaneously aluminium can crystal grain thinning, improves the tensile strength and the plasticity of zinc.And along with the raising of aluminium amount, the adhesivity of coating still keeps better, and hardness is higher, and wear resistance and erosion resistance are better.
The present invention is through adding Ce and two kinds of thuliums of Pr, except crystal grain thinning better, can also eliminate other element such as the ferro element deleterious effect to zinc alloy better, thereby improve the intensity and the plasticity of zinc alloy.
And the present invention is through adding Ce and two kinds of thuliums of Pr, and the increase that has overcome the component gap that causes owing to adding aluminium causes the defective that segregation phenomena increases; Reduced the surface tension on the new and old two-phase interface better; Also between crystal grain and alloy liquid, formed surface-active film when having accelerated nucleus growth speed better, stoped the grain growth that generates, made the alloy structure refinement; Guaranteed homogeneous microstructure, resistance to deformation increases.
And the present invention has improved the antioxidant property of thermal spraying material better through adding Ce and two kinds of thuliums of Pr, has suppressed the formation speed of sull better, has strengthened the antistripping ability of sull better.
And the present invention is through adding Ce and two kinds of thuliums of Pr, and REE can react with oxygen, sulphur in alloy liquid simultaneously, can adsorb in a large number and dissolved hydrogen, more effectively reduces its hazardness, reduces the hydrogen content and the pin hole rate of aluminium greatly.
At last; The present invention is through adding Ce and two kinds of thuliums of Pr; Optimize duraluminum interior metal crystalline structure better, when having improved the alloy structure corrosion resisting property better, also improved the physical and mechanical properties of alloy greatly; Guaranteed the processing and fabricating of silk material and the application in the construction, thoroughly overcome because the high more more difficult defective of silk that is drawn into of aluminium content.
Therefore; The present invention is through adding Ce and two kinds of thuliums of Pr; With respect to adding single REE, more obvious to the influence of zinc alloy intensity, and minimum of middle-weight rare earths content of the present invention needs to add the technique effect that 0.02% of total amount promptly can reach expection; This is very important to saving rare day by day rare earth resources, can greatly save production cost; On the other hand, the performance of Zn-Al alloy wire also can overcome to add the existing defective of single REE in the prior art along with the continuation of content of rare earth is risen and improvement more significantly fully.
Yet; The interpolation of rare earth metal total amount is not The more the better yet; The present invention is according to the composition of base mateiral; After testing repeatedly in a large number, screening, finally confirmed the optimum range of these two kinds of REE total contents technique effect of the present invention to be improved further through a series of creative works.
Simultaneously; The contriver also finds; Though any two or more rare earth adds the corrosion resistance that all can promote Zn-Al alloy wire in the Zn-Al alloy wire simultaneously in 17 kinds of REEs; But neither all arbitrarily two or more REEs add the technique effect that all can play equal highly significant in the Zn-Al alloy wire simultaneously to, this with can add the derivation that any two kinds of REEs all can reach identical technique effect in theory and differ greatly.The present invention has finally confirmed cerium (Ce) through a series of creative works after testing repeatedly in a large number, screening, these two kinds of REEs of praseodymium (Pr) and the optimum range when adding separately thereof, thus make technique effect of the present invention realize optimizing.
On this basis; The contriver is also through after testing, screening in a large number repeatedly; Finally confirmed optimum mass ratio between these two kinds of REEs through a series of creative works, thereby the beneficial effect of two kinds of thuliums of above-mentioned adding is further got a promotion and optimized, reached best.
In addition, also added the silicon of certain content in the Zn-Al alloy wire that the present invention adopts, added a certain amount of silicon and can further improve corrosive nature and the persistent corrosion resistance of Zn-Al alloy wire under high-temperature condition.
Yet along with the raising of silicone content, the toughness of Zn-Al alloy wire descends to some extent; For this reason, also added a certain amount of Mg in the Zn-Al alloy wire of the present invention, the interpolation of Mg can be played the effect of further refinement oxide compound; While is crystal grain thinning further, has significantly improved the toughness of alloy silk.
Simultaneously, the present invention comprises according to practical situation or does not comprise such as trace elements such as Fe, and this can improve coating opposing atomospheric corrosion, galvanic corrosion and airflow scouring erosive ability to a certain extent.
Further, the contriver finds through the mass ratio that suitable each formed part is set after testing repeatedly in a large number, screening, and can improve the ability such as anticorrosive of coating more significantly.Wherein, when Si/Mg=4/5～7/5, the best results of Mg refinement oxide compound and composite oxides thereof; Total amount=5/1～50/1 when two kinds of REEs of Si/; REE role in the alloy silk is best and can further reduce the negative impact that silicone content raises and brought, and when the total amount of two kinds of REEs of Mg/=15/1～25/1, the two does not have obvious influence to the formation of oxide compound; Simultaneously can effectively remove wherein unnecessary free oxygen level; The fastness to rubbing of coating is improved greatly, the concentration class of alloy is improved greatly, thereby improve the resistance to corrosion of alloy silk more significantly.
On the other hand, the method for preparing Zn-Al alloy wire provided by the invention through the improvement to drawing process, as after every time drawing, all annealing, thereby has further solved in the drawing process defective of fracture of wire easily.And further selection of draft temperature and speed etc. is made the metal thermal spraying coating silk material that makes, have outstanding adhesion, good physical mechanical property and solidity to corrosion.ME provided by the invention is simple and direct, and product cost is moderate, and its construction cost appropriateness helps applying.Technical problems such as the manufacturing cost that has solved present rare earth wire rod existence is expensive, barrier propterty is not enough, the construction application cost high, be difficult to apply.
In addition, adopt the very tangible technique effect of technical scheme another one of the present invention to be: the resistivity of said Zn-Al alloy wire is 2.0-6.0 μ Ω cm, and the proportion of said Zn-Al alloy wire is 3.18-5.69g/cm
3, the unit elongation 10-25% of said Zn-Al alloy wire.These excellent performances all are more than the alloy silk under the equal conditions in the prior art far away; The interior microscopic that Zn-Al alloy wire of the present invention is described is organized very large variation has also been taken place; Although these micro-variations can't use the structure of Zn-Al alloy wire or the qualification of composition to describe; But through further describing of above-mentioned performance perameter, those skilled in the art can clearly be known its qualification effect of being played to Zn-Al alloy wire of the present invention.
In sum, Zn-Al alloy wire of the present invention has that intensity is big, hardness is high, advantages such as low price, and alternative traditional zinc silk is used for fields such as anticorrosion with painting engineering.And this rear earth zinc-aluminium alloy hot coating has outstanding adhesion, good physical mechanical property and corrosion resisting property, and through experimental test, its average year erosion rate is significantly smaller than coatings such as the aluminium zinc, zinc aluminium false alloy of thermospray zinc, aluminium low levels; Its anodic protection effect also has clear improvement than aluminium, other aluminum alloy heat metallize layers; Whole silk material process for machining and manufacturing is simple and direct, cost is lower, construction application cost appropriateness.
Adopt Zn-Al alloy wire of the present invention to do sacrificial anode and be sprayed at the steel and iron member top layer; Can make member prolong 5～10 times work-ing life, therefore, this technology is widely used in naval vessel, power supply iron tower, large-scale storage tank, underground pipeline; In the facilities such as tunnel frame, has boundless application prospect.
Description of drawings
Polynary Zn-Al alloy wire of Fig. 1 the present invention and ZnAl
15The polarization curve of silk spray-on coating.
Embodiment
Polynary Zn-Al alloy wire of the present invention, by weight percentage, its component is: aluminium Al:15%-69%; Silicon Si:0.2-3%; Magnesium Mg:0.1-5%; Cerium Ce:0.01-0.7%, praseodymium Pr:0.01-0.2%, the total amount of these two kinds of REEs: 0.02-0.76%, and total amount is no more than 1% trace additives; Surplus is zinc Zn, and the resistivity of said Zn-Al alloy wire is 2.0-6.0 μ Ω cm, and the proportion of said Zn-Al alloy wire is 3.18-5.69g/cm
3, the unit elongation 10-25% of said Zn-Al alloy wire.
What need specify is here, adopts the very important improvement of technical scheme of the present invention to be, the resistivity of said Zn-Al alloy wire is 2.0-6.0 μ Ω cm, and the proportion of said Zn-Al alloy wire is 3.18-5.69g/cm
3, the unit elongation 10-25% of said Zn-Al alloy wire.These excellent performances all are more than the alloy silk under the equal conditions in the prior art far away; The interior microscopic that Zn-Al alloy wire of the present invention is described is organized very large variation has also been taken place; Although these micro-variations can't use the structure of Zn-Al alloy wire and/or the qualification of composition to describe; But through further describing of above-mentioned performance perameter, those skilled in the art can clearly be known its qualification effect of being played to Zn-Al alloy wire of the present invention.
Provide some preferred embodiments of each composition mass percent of the present invention below in conjunction with table 1; But the content of each composition of the present invention is not limited to listed numerical value in this table; For a person skilled in the art, fully can be in table rationally summarize and reasoning on the basis of listed numerical range.
Table 1: each composition accounts for the mass percentage content (%) and the correlated performance parameter of gross weight
Preferably, wherein the mass ratio of each composition is:
Si/Mg＝4/5～7/5，
Total amount=12/1～36/1 of two kinds of REEs of Si/,
Total amount=15/1～20/1 of two kinds of REEs of Mg/.
Preferred, Si/Mg=4/5～7/5,
The total amount of at least two kinds of REEs of Si/=20/1～25/1,
The total amount of at least two kinds of REEs of Mg/=15/1～18/1.
In addition, the present invention also provides a kind of method for preparing said Zn-Al alloy wire, gets the raw materials ready according to the weight percent of said each component of Zn-Al alloy wire; Each component is made aluminium zinc by proportioning in smelting furnace, pour into the aluminium zinc rod through the deep-well forging type again, then; The aluminium zinc rod is put into 350～450 ℃ electric furnace 4～8 hours, carry out homogenizing and handle, use extrusion machine again; At 380～420 ℃ of following hot extrusion materials, make material pass through circular die, form the thick line base of diameter 4.5～8mm; With the thick line base in vacuum annealing furnace 180～280 ℃ annealing 1.5～3 hours; Carry out drawing, annealing again, and then repeat above drawing, annealed step successively, up to the silk material of processing 1.5～4.0mm.
Preferably, the thick line base of diameter 4.5～8mm is stretched to diameter 4.0mm～7.0mm, and then annealing; Again with the wire stretching of 4.0mm～7.0mm to 3.5mm～6.0mm, and then annealing; At last with wire stretching to 1.5～4.0mm of 3.5mm～6.0mm.
Preferably, the annealing temperature after wherein each drawing is 180～230 ℃, and annealing time is 1.5～3 hours.
Preferably, wherein the drawing speed of each passage is 10～35mm/min, and draft temperature is 20～30 ℃.
Preferably, wherein polynary Zn-Al alloy wire is 1.33 * 10 in vacuum tightness
-2In 180-280 ℃ of annealing 1.5-3 hour, 350～500 tons extrusion machine was adopted in extruding in the vacuum oven of Pa.
The said Zn-Al alloy wire that adopts aforesaid method to obtain, diameter is 1.5-4.0mm, and the tensile strength of said Zn-Al alloy wire is 75-115Mpa, and concrete performance perameter is as shown in table 2 below:
Table 2: the diameter of Zn-Al alloy wire and the performance perameter of tensile strength
| Diameter (mm) | Tensile strength (Mpa) |
| 1.5 | 75 |
| 1.8 | 82 |
| 2.0 | 85 |
| 2.2 | 88 |
| 2.5 | 92 |
| 2.8 | 97 |
| 3.0 | 102 |
| 3.3 | 108 |
| 3.8 | 111 |
| 4.0 | 115 |
The erosion resistance experimental result
Testing method
The spraying method of the polynary thermospray Zn-Al alloy wire of processing is described below.At first, matrix surface is carried out pre-treatment, slough surface oxide layer, expose unsalted surface.Pre-treatment can be handled by sand-blast.Then, adopt flame plating or arc spray process, the polynary thermospray Zn-Al alloy wire that will process with spray gun sprays on the pretreated matrix surface, is sprayed into coat-thickness 0.075～0.350mm.
1, the electro-chemical test of the spray-on coating of zinc-aluminium multicomponent alloy silk
(1) preparation of spraying sample
The matrix surface pre-treatment
Matrix adopting 20
#Steel generally adopts blasting craft to carry out surface treatment, and used sand does not have argillous silica sand or copper ore for dry, and granularity is 6～12 orders, and it has hard and the characteristics of corner angle are arranged.Air pressure is 5～6 * 10 during sandblast
5Pa.Nozzle is 15～20cm to the distance of workpiece surface, and jet angle is generally about 70 °, excessive or too smallly all can reduce sandblast efficient.Workpiece after sandblasting requires to reach even roughness, metal luster, no rusty stain, stain and moisture.
Spraying
Adopt arc spraying, to being of a size of pretreated 20 of 150 * 150 * 3mm
#The ZnAl that polynary Zn-Al alloy wire that spraying is processed on the steel plate and market are bought
15, analyze its electrochemical properties in 3.5%NaCl solution.For the ease of analyzing, polynary Zn-Al alloy wire and ZnAl have under equal conditions been sprayed
15The silk material to analyze under the equal conditions, sprays polynary Zn-Al alloy wire and spraying ZnAl
15, the quality of its corrosive nature.
(2) electro-chemical test
The CHI660C electrochemical workstation that adopts Shanghai occasion China Instr Ltd. to produce carries out electro-chemical test to coating.Test condition is following:
Electrolytic solution: 3.5%NaCl solution;
Reference electrode: platinum electrode;
The sample that 150 * 150 * 3mm sample line after the spraying is cut into 3 * 3 * 3mm carries out electro-chemical test.
If the test knot is as shown in Figure 1, Fig. 1 shows the electrochemistry curve of two kinds of different coating, and wherein Reference numeral 1,2 is represented polynary Zn-Al alloy wire spray-on coating, ZnAl respectively
15The polarization curve of silk spray-on coating can find out clearly that the polynary Zn-Al alloy wire spray-on coating of the present invention performance obviously is superior to ZnAl from figure
15The silk spray-on coating.
For the clearer and more definite performance gap between the two that contrasts, following table 3 has been listed polynary Zn-Al alloy wire of the present invention and ZnAl
15The open circuit potential of silk spray-on coating and the contrast of corrosion electric current density can more clearly draw from table, and the polynary Zn-Al alloy wire spray-on coating of the present invention performance obviously is superior to ZnAl
15The silk spray-on coating.
Table 3: the open circuit potential of two kinds of different spray-on coatings and corrosion electric current density
In sum, the present invention is through to Zn-Al alloy wire, preparation technology's improvement, can form anti-corrosion, wear resistance good, the coating that gets togather with the matrix metallurgical junction.The improvement of any adaptation of on basis of the present invention, carrying out does not all break away from thought of the present invention, all falls into the scope of the present invention's protection.
Claims (10)
1. polynary Zn-Al alloy wire, by weight percentage, its component is: aluminium Al:15%-69%; Silicon Si:0.2-3%; Magnesium Mg:0.1-5%; Cerium Ce:0.01-0.7%, praseodymium Pr:0.01-0.2%, the total amount of these two kinds of REEs: 0.02-0.76%, and total amount is no more than 1% trace additives; Surplus is zinc Zn, and the resistivity of said Zn-Al alloy wire is 2.0-6.0 μ Ω cm, and the proportion of said Zn-Al alloy wire is 3.18-5.69g/cm
3, the unit elongation 10-25% of said Zn-Al alloy wire.
2. Zn-Al alloy wire as claimed in claim 1, the total amount of wherein said two kinds of REEs: 0.30-0.72%, the resistivity of said Zn-Al alloy wire is 2.8-5.5 μ Ω cm, the proportion of said Zn-Al alloy wire is 3.50-4.94g/cm
3, the unit elongation 10-20% of said Zn-Al alloy wire.
3. Zn-Al alloy wire as claimed in claim 1, the diameter of wherein said Zn-Al alloy wire are 1.5-4.0mm, and the tensile strength of said Zn-Al alloy wire after 180-280 ℃ of annealing reached repeatedly drawing in 1.5-3 hour is 75-115Mpa.
4. Zn-Al alloy wire according to claim 1, the mass ratio of wherein said two kinds of REEs is Ce/Pr=2/1～9/1.
5. Zn-Al alloy wire as claimed in claim 1, wherein the mass ratio of each composition is:
Si/Mg＝4/5～7/5，
Total amount=5/1～50/1 of two kinds of REEs of Si/,
Total amount=15/1～25/1 of two kinds of REEs of Mg/.
6. as shining the said Zn-Al alloy wire of claim 1, the composition of each component is respectively by weight percentage in the wherein said trace additives: Fe＜0.01%, Pb＜0.005%, Cd＜0.002%, Sn＜0.001%.
7. a method for preparing the said Zn-Al alloy wire of claim 1 is got the raw materials ready according to the weight percent of said each component of Zn-Al alloy wire, and each component is made aluminium zinc by proportioning in smelting furnace; Pour into the aluminium zinc rod through the deep-well forging type again, then, the aluminium zinc rod put into 350～450 ℃ electric furnace 4～8 hours; Carry out homogenizing and handle, use extrusion machine again, at 380～420 ℃ of following hot extrusion materials; Make material pass through circular die; Form the thick line base of diameter 4.5～8mm,, carry out drawing, annealing again 180～280 ℃ of annealing 1.5～3 hours in vacuum annealing furnace of thick line base; And then repeat above drawing, annealed step successively, up to the silk material of processing 1.5～4.0mm.
8. method as claimed in claim 7, wherein drawing process is following: the thick line base of diameter 4.5～8mm is stretched to diameter 4.0mm～7.0mm, and then annealing; Again with the wire stretching of 4.0mm～7.0mm to 3.5mm～6.0mm, and then annealing; At last with wire stretching to 1.5～4.0mm of 3.5mm～6.0mm.
9. method as claimed in claim 8, the annealing temperature after wherein each drawing is 180～230 ℃, annealing time is 1.5～3 hours.
10. method as claimed in claim 8, wherein the drawing speed of each passage is 10～35mm/min, draft temperature is 20～30 ℃.
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| CN103406539A (en) * | 2013-07-31 | 2013-11-27 | 江苏麟龙新材料股份有限公司 | Ce-Pr-containing flaky multi-component aluminum zinc silicon alloy powder and preparation method thereof |
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| CN103406539A (en) * | 2013-07-31 | 2013-11-27 | 江苏麟龙新材料股份有限公司 | Ce-Pr-containing flaky multi-component aluminum zinc silicon alloy powder and preparation method thereof |
| CN103406539B (en) * | 2013-07-31 | 2016-03-30 | 江苏麟龙新材料股份有限公司 | Scale-like multi-component zinc aluminum silicon alloy powder containing Ce and Pr and preparation method thereof |
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