CN102719703B - Multi-component zinc-aluminium alloy capable of enhancing comprehensive chemical properties - Google Patents
Multi-component zinc-aluminium alloy capable of enhancing comprehensive chemical properties Download PDFInfo
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- CN102719703B CN102719703B CN 201210210723 CN201210210723A CN102719703B CN 102719703 B CN102719703 B CN 102719703B CN 201210210723 CN201210210723 CN 201210210723 CN 201210210723 A CN201210210723 A CN 201210210723A CN 102719703 B CN102719703 B CN 102719703B
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Abstract
A multi-component zinc-aluminium alloy capable of enhancing comprehensive mechanics properties belongs to the technical field of zinc-aluminium alloy preparation and is characterized in that No.A00 industrial aluminium ingots, No.0 zinc ingots, electrolytic copper, composite modifier (including 20 to 30 percent of Ni, 15 to 25 percent of Ti, 5 to 15 percent of Mn, 5 to 15 percent of Cr, 5 to 10 percent of Si, 5 to 10 percent of Ce, 5 to 10 percent of La, 1 to 6 percent of Y, 1 to 6 percent of Nb, 1 to 6 percent of V and the balance of aluminium) and pure magnesium are adopted as materials. Calculated according to percentage by weight, 27 to 29 percent of Al, 2 to 2.5 percent of Cu (added in the form of aluminium-copper master alloy containing 50 percent of copper), 0 to 1.2 percent of composite modifier, 0.01 to 0.02 percent of Mg and the balance of Zn are weighed and then smelted in an induction smelting furnace. Smelting is carried out according to 0 to 1.2 percent of added composite modifier, seven groups of zinc-aluminium alloy billets with different composite modifiers are then cast, and mechanics properties are tested.
Description
Technical field
The invention belongs to the aluminium zinc preparing technical field, refer in particular to a kind of polynary aluminium zinc that can improve comprehensive mechanical property.
Background technology
The zinc-aluminium casting alloy has that good mechanical performance and wear and corrosion behavior, density are lower, thermal conductivity and specific conductivity is moderate, ultimate tensile strength is high, wear resistance is good, load is good, nonmagnetic, it is lower not produce spark, vibration and noise reducing performance and cost during collision, be applied to every field just more and more widely, and bring remarkable economic efficiency.Aluminium zinc has become the alloy material of widespread use with its less energy-consumption, pollution-free, abundant raw materials and series of advantages such as good mechanical performance, processing performance and machining property.The later stage seventies in last century has been developed ZA8 and comprehensive mechanical property aluminium zinc preferably again.After this, worldwide, people begin one's study, develop aluminium zinc, and in national standard is also listed aluminium zinc by some countries.China also compares early for the research of high alumina zinc base alloy, and many scientific research institutions and institution of higher learning have also carried out the research of this respect the beginning of the eighties in late 1970s.Now, reaching the eighties of the advanced level of Zn-Al-Cu series in the world aspect comprehensive mechanical performance and the use properties, and successfully be used for doing high-abrasive material and mfg. moulding die etc.However, China compares with developed country, and the distance that is wanting in is still bigger applying.The rich zinc of China lacks copper, meets national conditions with zinc for copper, and the development aluminium zinc makes resources advantage become economic advantages, in the modernization construction of China major and immediate significance is arranged.
But also there is following problem in aluminium-zinc alloy, the one, toughness is relatively poor: aluminium zinc is under general gravitational casting condition, eutectoid transformation does not take place, its non-equilibrium microstructure is by η+(η+α) form, it is the sosoloid of base that η, α are respectively with zinc, aluminium, α at room temperature is actually the supersaturated solid solution that contains zinc mutually, the be harmonious η phase of rich zinc of the α ' that it is decomposed into rich aluminium in time gradually.Be attended by volumetric expansion in decomposition course, form huge internal stress in foundry goods, promote intergranular corrosion, plasticity obviously reduces, and alloy is become fragile, and this decomposition course is Natural Aging Process, often is called " wearing out ".The 2nd, the dendritic segregation of solidified structure is serious: aluminium zinc is because crystallization range is wide, and the composition of solid, liquid phase changes greatly in the process of setting, so the microsegregation of as-cast structure is very serious.In the zone, interdendritic, copper can not remain in the sosoloid more fully, separates out mutually and be CuZn4.The direct result of dendritic segregation is that actual solidus curve descends, and causes the appearance of non-equilibrium eutecticum tissue, and eutectic appears in dendrite in the tissue of zinc-aluminium.This dendritic segregation and non-equilibrium eutecticum tissue can be eliminated by even thermal treatment.If but dendrite interval is excessive, spread to eliminate the ununiformity of composition by thermal treatment, difficulty also is quite big, so preferably dwindle dendrite interval or fragmentation dendrite.The 3rd, the shrinkage porosite tendency of foundry goods is big, and the crystallization range of aluminium zinc is wide, the segregation tendency is big, and rich aluminium phase dendrite nascent during slow cooling is owing to gravity segregation floats, and the liquid of rich zinc then deposits to foundry goods bottom, final set.Solidify latter stage, dendrite forms network, and remaining liquid phase is owing to can rise by wetting dendrite, and the inflow interdendritic can compensate for shrinkage, thereby bottom surface shrinkage porosite, shrinkage cavity occur.
The mechanical property of material is the importance that material at first will be considered in engineering is used.Though cast zinc intensity of aluminum alloy, plasticity are better, can't satisfy the demand, this has just limited its range of application.Therefore, adopt new means and processing method further to improve its mechanical property, Application Areas is the problem that presses for solution to make it have widely.
The present invention develops a kind of polynary aluminium zinc that can improve comprehensive mechanical property.
Summary of the invention
The present invention develops a kind of polynary aluminium zinc that can improve comprehensive mechanical property, it is characterized by: be raw material with industrial aluminium ingot A00 number, No. 0, zinc ingot metal, electrolytic copper, compound modifier (wherein Ni20-30%, Ti15-25%, Mn5-15%, Cr5-15%, Si5-10%, Ce5-10%, La5-10%, Y1-6%, Nb1-6%, V1-6%, surplus be aluminium), pure magnesium.Composition is counted by weight percentage, and is the back melting in induction melting furnace of weighing of the ratio of Zn in Al27-29%, Cu2-2.5% (adding with the aluminum bronze master alloy form of cupric 50%), compound modifier 0-1.2%, Mg0.01-0.02%, surplus.Melting technology is: add aluminium ingot, zinc ingot metal, aluminum bronze master alloy, compound modifier earlier, after treating that material all melts, insulation 6min-8min makes each element homogenizing when being warming up to 600～650 ℃, for the scaling loss that reduces magnesium is pressed into magnesium in the molten metal with bell jar, with the dehydration ZnCl of containing metal liquid 0.2%
2Carry out refining, during refining with the bell jar ZnCl that will dewater
2Be pressed in the molten metal, leave standstill the degasification of skimming behind the 8min-10min, treat to prepare when temperature is 560 ℃-580 ℃ cast.Casting technique is: sand mold casting, base plate is metal mold, with melted aluminium zinc casting growth 250mm, the blank of wide 40mm, high 70mm, according to the difference that adds compound modifier, water the aluminium zinc blank that casts out seven groups of compound modifier different contents, its compound modifier add-on is respectively 0%, 0.2%, 0.4%, 0.6%, 0.8%, 1.0%, 1.2%, is processed into the national standard coupon then.The room temperature tensile Mechanics Performance Testing is carried out at WE-10 type fluid pressure type stretching experiment machine.
As seen from Figure 1, when not adding compound modifier, the primary of alloy is dentrite mutually and solidifies, and dendrite is thick, and has secondary branch, crystal boundary to be continuously or the suspension shape.Compound modifier adds mutually influential to the proeutectic α in the aluminium zinc as-cast structure, increase along with the composite inoculating agent content, α phase dendrite shortens, alloy structure begins refinement, primary by thick dentrite tissue to the structural transformation of flower shape, secondary dendrite is organized also minimizing, as Fig. 2 (a), (b) shown in; Along with the further increase of composite inoculating agent content, the further refinement of alloy structure is when the composite inoculating agent content reaches 0.6%-0.8%, the dendritic structure thinning effect is obvious, alloy treeing fundamental transformation is flower shape or flakes, as Fig. 2 (c), (d) shown in; But when the composite inoculating agent content was increased to 1.2% from 1.0%, dendritic structure began alligatoring, as Fig. 2 (e), (f) shown in.So being added in of compound modifier changed α phase dendritic morphology to a certain extent, refinement tissue, alleviated dendritic segregation.
Table 1 is depicted as when adding the different content compound modifier, the tensile strength of polynary aluminium zinc, elongation and hardness.As can be seen from Table 1, along with the increase of composite inoculating agent content, tensile strength of alloys, elongation all is elder generation's rising and reduces trend again.When the composite inoculating agent content reached 0.6%, the tensile strength of polynary aluminium zinc can reach 441MPa, and elongation can reach 6.1%, and hardness is 152HBC.But along with the continuation of composite inoculating agent content increases, tensile strength and elongation present downtrending again accordingly, when the composite inoculating agent content is increased to 1.2%, and tensile strength, elongation drops to 415MPa respectively, and 5.1%, hardness then changes not quite.
Table 1 adds the mechanical property of the polynary aluminium zinc of different content compound modifier
Because the adding of compound modifier makes the alloy grain refinement, thereby has improved the comprehensive mechanical property of alloy.After adding compound modifier, in process of setting, a spot of compound modifier solid solution in α and β mutually in, strengthened matrix, eutectic reaction takes place in remaining then being discharged to copper in the eutectic liquid, form rich nickel phase particle in crystal boundary, thereby strengthens fragile eutectic structure.But along with the continuous increase of composite inoculating agent content, compound modifier master alloy content produces more rich nickel phase particle greater than after 1% in the crystal boundary, crystal boundary is increased, and it is thick that size becomes, and defective increases, and matrix caused the effect of isolating, thereby make alloy plasticity and toughness, strength degradation.In addition, compound modifier adds and too much can be difficult to dissolve fully, and makes and Al, and the Zn reaction generates some compounds, thereby has reduced the mechanical property of alloy.
Description of drawings
Fig. 1 does not add the solidified structure of the polynary aluminium zinc of compound modifier
Fig. 2 adds the solidified structure of the polynary aluminium zinc of different content compound modifier
(a)0.2％，(b)0.4％(c)0.6％，(d)0.8％，(e)1.0％，(f)1.2％
Embodiment
Be raw material with industrial aluminium ingot A00 number, No. 0, zinc ingot metal, electrolytic copper, compound modifier (wherein Ni20-30%, Ti15-25%, Mn5-15%, Cr5-15%, Si5-10%, Ce5-10%, La5-10%, Y1-6%, Nb1-6%, V1-6%, surplus be aluminium), pure magnesium.Composition is counted by weight percentage, and is the back melting in induction melting furnace of weighing of the ratio of Zn in Al28%, Cu2.3% (adding with the aluminum bronze master alloy form of cupric 50%), compound modifier 0.2%, Mg0.015%, surplus.Melting technology is: add aluminium ingot, zinc ingot metal, aluminum bronze master alloy, compound modifier earlier, after treating that material all melts, insulation 6min-8min makes each element homogenizing when being warming up to 600～650 ℃, for the scaling loss that reduces magnesium is pressed into magnesium in the molten metal with bell jar, with the dehydration ZnCl of containing metal liquid 0.2%
2Carry out refining, during refining with the bell jar ZnCl that will dewater
2Be pressed in the molten metal, leave standstill the degasification of skimming behind the 8min-10min, treat to prepare when temperature is 560 ℃-580 ℃ cast.Casting technique is: sand mold casting, base plate is metal mold, with melted aluminium zinc casting growth 250mm, the blank of wide 40mm, high 70mm, according to the difference that adds compound modifier, water the aluminium zinc blank that casts out seven groups of compound modifier different contents, be processed into the national standard coupon then.The room temperature tensile Mechanics Performance Testing is carried out at WE-10 type fluid pressure type stretching experiment machine.At this moment, the solidified structure of polynary aluminium zinc is shown in Fig. 2 (a), and the tensile strength of polynary aluminium zinc is 431MPa, and elongation is 5.8%, and hardness is 141HB.
Embodiment 2
Be raw material with industrial aluminium ingot A00 number, No. 0, zinc ingot metal, electrolytic copper, compound modifier (wherein Ni20-30%, Ti15-25%, Mn5-15%, Cr5-15%, Si5-10%, Ce5-10%, La5-10%, Y1-6%, Nb1-6%, V1-6%, surplus be aluminium), pure magnesium.Composition is counted by weight percentage, and is the back melting in induction melting furnace of weighing of the ratio of Zn in Al28%, Cu2.3% (adding with the aluminum bronze master alloy form of cupric 50%), compound modifier 0.6%, Mg0.015%, surplus.Melting technology is: add aluminium ingot, zinc ingot metal, aluminum bronze master alloy, compound modifier earlier, after treating that material all melts, insulation 6min-8min makes each element homogenizing when being warming up to 600～650 ℃, for the scaling loss that reduces magnesium is pressed into magnesium in the molten metal with bell jar, with the dehydration ZnCl of containing metal liquid 0.2%
2Carry out refining, during refining with the bell jar ZnCl that will dewater
2Be pressed in the molten metal, leave standstill the degasification of skimming behind the 8min-10min, treat to prepare when temperature is 560 ℃-580 ℃ cast.Casting technique is: sand mold casting, base plate is metal mold, with melted aluminium zinc casting growth 250mm, the blank of wide 40mm, high 70mm, according to the difference that adds compound modifier, water the aluminium zinc blank that casts out seven groups of compound modifier different contents, be processed into the national standard coupon then.The room temperature tensile Mechanics Performance Testing is carried out at WE-10 type fluid pressure type stretching experiment machine.At this moment, the solidified structure of polynary aluminium zinc is shown in Fig. 2 (c), and the tensile strength of polynary aluminium zinc is 441MPa, and elongation is 6.1%, and hardness is 152HB.
Embodiment 3
Be raw material with industrial aluminium ingot A00 number, No. 0, zinc ingot metal, electrolytic copper, compound modifier (wherein Ni20-30%, Ti15-25%, Mn5-15%, Cr5-15%, Si5-10%, Ce5-10%, La5-10%, Y1-6%, Nb1-6%, V1-6%, surplus be aluminium), pure magnesium.Composition is counted by weight percentage, and is the back melting in induction melting furnace of weighing of the ratio of Zn in Al28%, Cu2.3% (adding with the aluminum bronze master alloy form of cupric 50%), compound modifier 1.2%, Mg0.015%, surplus.Melting technology is: add aluminium ingot, zinc ingot metal, aluminum bronze master alloy, compound modifier earlier, after treating that material all melts, insulation 6min-8min makes each element homogenizing when being warming up to 600～650 ℃, for the scaling loss that reduces magnesium is pressed into magnesium in the molten metal with bell jar, with the dehydration ZnCl of containing metal liquid 0.2%
2Carry out refining, during refining with the bell jar ZnCl that will dewater
2Be pressed in the molten metal, leave standstill the degasification of skimming behind the 8min-10min, treat to prepare when temperature is 560 ℃-580 ℃ cast.Casting technique is: sand mold casting, base plate is metal mold, with melted aluminium zinc casting growth 250mm, the blank of wide 40mm, high 70mm, according to the difference that adds compound modifier, water the aluminium zinc blank that casts out seven groups of compound modifier different contents, be processed into the national standard coupon then.The room temperature tensile Mechanics Performance Testing is carried out at WE-10 type fluid pressure type stretching experiment machine.At this moment, the solidified structure of polynary aluminium zinc is shown in Fig. 2 (f), and the tensile strength of polynary aluminium zinc is 415MPa, and elongation is 5.1%, and hardness is 153HB.
Comparative Examples
Be raw material with industrial aluminium ingot A00 number, No. 0, zinc ingot metal, electrolytic copper, pure magnesium.Composition is counted by weight percentage, and is the back melting in induction melting furnace of weighing of the ratio of Zn in Al28%, Cu2.3% (adding with the aluminum bronze master alloy form of cupric 50%), Mg0.015%, surplus.Melting technology is: add earlier aluminium ingot, zinc ingot metal, aluminum bronze master alloy, treat that material is all after the fusing, insulation 6min-8min makes each element homogenizing when being warming up to 600～650 ℃, for the scaling loss that reduces magnesium is pressed into magnesium in the molten metal with bell jar, with the dehydration ZnCl of containing metal liquid 0.2%
2Carry out refining, during refining with the bell jar ZnCl that will dewater
2Be pressed in the molten metal, leave standstill the degasification of skimming behind the 8min-10min, treat to prepare when temperature is 560 ℃-580 ℃ cast.Casting technique is: sand mold casting, base plate are metal mold, with melted aluminium zinc casting growth 250mm, the blank of wide 40mm, high 70mm, are processed into the national standard coupon then.The room temperature tensile Mechanics Performance Testing is carried out at WE-10 type fluid pressure type stretching experiment machine.At this moment, the solidified structure of polynary aluminium zinc as shown in Figure 1, the tensile strength of polynary aluminium zinc is 421MPa, elongation is 4.8%, hardness is 138HB.
Claims (2)
1. polynary aluminium zinc that can improve comprehensive mechanical property, it is characterized by: with industrial aluminium ingot A00 number, No. 0, zinc ingot metal, electrolytic copper, compound modifier: wherein Ni20-30%, Ti15-25%, Mn5-15%, Cr5-15%, Si5-10%, Ce5-10%, La5-10%, Y1-6%, Nb1-6%, V1-6%, surplus be aluminium, pure magnesium is raw material; Composition is counted by weight percentage, and is the back melting in induction melting furnace of weighing of the ratio of Zn in Al27-29%, Cu2-2.5%, compound modifier 0.2-1.2%, Mg0.01-0.02%, surplus; Melting technology is: add aluminium ingot, zinc ingot metal, electrolytic copper, compound modifier earlier, after treating that material all melts, insulation 6min-8 min makes each element homogenizing when being warming up to 600 ~ 650 ℃, for the scaling loss that reduces magnesium is pressed into magnesium in the molten metal with bell jar, with the dehydration ZnCl of containing metal liquid 0.2%
2Carry out refining, during refining with the bell jar ZnCl that will dewater
2Be pressed in the molten metal, leave standstill the degasification of skimming behind the 8min-10min, treat to prepare when temperature is 560 ℃-580 ℃ cast; Casting technique is: sand mold casting, base plate is metal mold, with melted aluminium zinc casting growth 250mm, the blank of wide 40mm, high 70mm, according to the difference that adds compound modifier, water the aluminium zinc blank that casts out six groups of compound modifier different contents, its compound modifier add-on is respectively 0.2%, 0.4%, 0.6%, 0.8%, 1.0%, 1.2%, is processed into the national standard coupon then; The room temperature tensile Mechanics Performance Testing is carried out at WE-10 type fluid pressure type stretching experiment machine.
2. according to the described a kind of polynary aluminium zinc that can improve comprehensive mechanical property of claim 1, adding compound modifier is 0.6% o'clock, and the mechanical property of polynary aluminium zinc is best, and tensile strength is 441MPa, and elongation reaches 6.1%, and hardness is 152HB.
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| CN103290266B (en) * | 2013-07-03 | 2015-06-10 | 陈灿 | High aluminum zinc alloy and preparation method and heat treatment method thereof |
| CN104342593A (en) * | 2013-08-04 | 2015-02-11 | 镇江忆诺唯记忆合金有限公司 | Copper-zinc-aluminum memory alloy for improving phase transformation point stability under hot and cold cycles |
| CN105087978A (en) * | 2014-05-07 | 2015-11-25 | 镇江忆诺唯记忆合金有限公司 | Zinc-aluminum-copper-manganese alloy with improved mechanical properties |
| CN107177755B (en) * | 2017-07-24 | 2018-09-21 | 烟台市睿丰新材料科技有限公司 | High-strength, high-anti-friction zinc-containing alloy, its casting preparation method and dedicated unit |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1379139A (en) * | 1971-09-02 | 1975-01-02 | Vaw Ver Aluminium Werke Ag | Method for the fluxless soldering or brazing of aluminium and its alloys |
| CN1254766A (en) * | 1998-11-25 | 2000-05-31 | 山东工业大学 | Antiwear Zn-Al alloy and its smelting technology |
| CN1281054A (en) * | 2000-08-24 | 2001-01-24 | 刘宝第 | High-Al zinc-base alloy for manufacturing holder of rolling bearing body |
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| JP5295951B2 (en) * | 2006-05-24 | 2013-09-18 | ブルースコープ・スティール・リミテッド | Treatment of Al / Zn based alloy coated products |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1379139A (en) * | 1971-09-02 | 1975-01-02 | Vaw Ver Aluminium Werke Ag | Method for the fluxless soldering or brazing of aluminium and its alloys |
| CN1254766A (en) * | 1998-11-25 | 2000-05-31 | 山东工业大学 | Antiwear Zn-Al alloy and its smelting technology |
| CN1281054A (en) * | 2000-08-24 | 2001-01-24 | 刘宝第 | High-Al zinc-base alloy for manufacturing holder of rolling bearing body |
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