EP3184659A1 - Silumin for pressure die casting with additive of wolfram and vanadium - Google Patents
Silumin for pressure die casting with additive of wolfram and vanadium Download PDFInfo
- Publication number
- EP3184659A1 EP3184659A1 EP15003706.7A EP15003706A EP3184659A1 EP 3184659 A1 EP3184659 A1 EP 3184659A1 EP 15003706 A EP15003706 A EP 15003706A EP 3184659 A1 EP3184659 A1 EP 3184659A1
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- EP
- European Patent Office
- Prior art keywords
- silumin
- wolfram
- vanadium
- additive
- die casting
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/02—Alloys based on aluminium with silicon as the next major constituent
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D21/00—Casting non-ferrous metals or metallic compounds so far as their metallurgical properties are of importance for the casting procedure; Selection of compositions therefor
- B22D21/002—Castings of light metals
- B22D21/007—Castings of light metals with low melting point, e.g. Al 659 degrees C, Mg 650 degrees C
Definitions
- the subject of this invention is hypo-eutectic silumin with additive of wolfram and vanadium designed for pressure die casting.
- Hypo-eutectic silumin alloys mostly used for pressure die casting, contain following chemical elements in weight percentage: 8,0-11,0% Si; 0,60-1,3% Fe; 2,0- 4,0% Cu; 0,10-0,55% Mn; 0,05-0,55% Mg; 0,00-0,15 % Cr; 0,30-0,55 % Ni; ⁇ 1,2 % Zn; 0,15-0,25 % Ti.
- Silumin of composition indicated above is characterized by a microstructure consists of: solid solution of alloy addition in aluminium ( ⁇ ) and complex eutectic mixture.
- Eutectic mixture composition may also include, besides phase ⁇ , solid solution of alloy addition in silicon ( ⁇ ) and intermetallic phases: Al 2 Cu, Al 9 Fe 3 Si 2 , Mg 2 Si and AlSiCuFeMnMgNiCrSnTi.
- Silumin which includes W and V, in accordance with the invention contains in weight percentage: 7,5-8,7%, Si; 0,7-1,2% Fe; 2,0- 3,0% Cu; 0,10-0,50% Mn; 0,05-0,50% Mg; 0,00-0,15 % Cr; 0,05-0,40 % Ni; 0,9-1,1 % Zn; 0,00-0,10 % Ti; 0,10-0,30 % W and 0,10-0,30 % V.
- wolfram and vanadium were introduced in the form of master alloy AlW8 and AlV10.
- Application of master alloys allows dissolution of W and V in silumin.
- Both wolfram and vanadium does not dissolve, in solid state aluminium, however they form with aluminium many varieties of intermetallic phases.
- Silumin crystallization process inside pressure casting die arises very intensively, which causes the possibility of supersaturation with wolfram and vanadium phase ⁇ .
- Phase ⁇ supersaturated with wolfram and vanadium may be characterized by higher mechanical properties in relation to solid solution ⁇ present in hypo-eutectic silumin without additive of W and V.
- Introduction of W and V additive into hypo-eutectic silumin for pressure die casting allows to obtain alloy with better mechanical properties in relation to commonly used in the range of this technology hypo-eutectic silumin alloys.
- Condition of obtaining hypo-eutectic silumin with additive of W and V of increased mechanical properties is supersaturation of solid solution ⁇ with wolfram and vanadium and avoidance of intermetallic phases release of relatively big sizes and complex morphology from equilibrium systems Al-W and Al-V.
- Pressure casting made from silumin in accordance with the invention presents high tensile strength R m and high unit elongation A.
- silumin was melted in the melting furnace heated with gas, with maximum charge capacity of 1,5 tons.
- the chemical composition of silumin was following: % in weight Si Fe Cu Mn Mg Cr Ni Zn Ti Al 8,66 0,86 2,36 0,23 0,33 0,04 0,11 0,93 0,05 rest
- silumin Inside heating furnace composition of silumin was completed with master alloys containing vanadium and wolfram, and these were accordingly AlV10 and AlW8. Temperature of silumin inside heating furnace was 750 °C. In this temperature the alloy with master alloys was kept for 20 minutes. During this time period master alloy AlV10 and AlW8 were totally dissolved. Pressure castings were produced from 3 (three) silumin variants with additive of W and V.
- silumin and master alloys AlV10 and AlW8 were taken in such manner so the following chemical composition of three silumin variants with additive of W and V was obtained: Silumin % in weight variant Si Fe Cu Mn Mg Cr Ni Zn Ti W V Al 1 8,66 0,81 2,52 ; 0,20 0,35 0,04 0,12 0,95 0,04 0,10 0,10 rest 2 8,40 0,87 2,32 0,22 0,33 0,03 0,11 0,91 0,04 0,20 0,20 rest 3 7,99 0,85 2,37 0,21 0,33 0,03 0,10 0,90 0,04 0,30 0,30 rest
- microstructure of silumin with additive of W and V is presented on fig. 1 (a-c). It is composed of solid solution of alloy addition in aluminium ( ⁇ ), ternary eutectic ⁇ +Al 9 Fe 3 Si 2 + ⁇ and quaternary eutectic ⁇ +Al 2 Cu+AlSiCuFeMgMnNiVW+ ⁇ .
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- Continuous Casting (AREA)
Abstract
The subject of this invention is hypo-eutectic silumin with additive of wolfram and vanadium designed for pressure die casting. In accordance with the invention it contains in weight percentage: 7,5-8,7% Si; 0,7-1,2% Fe; 2,0- 3,0% Cu; 0,10-0,50% Mn; 0,05-0,50% Mg; 0,00-0,15 % Cr; 0,05-0,40 % Ni; 0,9-1,1 % Zn; 0.20-0.35% Pb; 0.10-0.15% Sn 0,00-0,10 % Ti; 0,10-0,30 % W; 0,10-0,30 % V and the balance being Al. The application of silumin with additive of W and V for pressure die casting enables to get the effect of supersaturation of silumin solid solution with these additives. Supersaturation of silumin solid solutions with wolfram and vanadium is possible thanks to extremely dynamic silumin crystallization process inside pressure casting die. The effect of supersaturation with additives W and V, alumimum in particular, induces enlarging of silumin tensile strength Rm and unit elongation A. Silumin in accordance with the invention is characterized by its content of W 0,10-0,30 % and V 0,10-0,30 % in weight peccentage.
Description
- The subject of this invention is hypo-eutectic silumin with additive of wolfram and vanadium designed for pressure die casting.
- Hypo-eutectic silumin alloys, mostly used for pressure die casting, contain following chemical elements in weight percentage: 8,0-11,0% Si; 0,60-1,3% Fe; 2,0- 4,0% Cu; 0,10-0,55% Mn; 0,05-0,55% Mg; 0,00-0,15 % Cr; 0,30-0,55 % Ni; ~1,2 % Zn; 0,15-0,25 % Ti.
- Silumin of composition indicated above is characterized by a microstructure consists of: solid solution of alloy addition in aluminium (α) and complex eutectic mixture. Eutectic mixture composition may also include, besides phase α, solid solution of alloy addition in silicon (β) and intermetallic phases: Al2Cu, Al9Fe3Si2, Mg2Si and AlSiCuFeMnMgNiCrSnTi.
- Mechanical properties of described pressure die casting silumin are following: tensile strength Rm ≥ 240 MPa; yield strength Rp0,2 ≥ 140 MPa; unit elongation A < 1 %, hardness HBW ≥ 80. Development of silumin with thickness comparable to the alloy described above and higher strength properties, enables getting pressure castings with lower wall thickness and the same strength parameters.
- Silumin which includes W and V, in accordance with the invention contains in weight percentage: 7,5-8,7%, Si; 0,7-1,2% Fe; 2,0- 3,0% Cu; 0,10-0,50% Mn; 0,05-0,50% Mg; 0,00-0,15 % Cr; 0,05-0,40 % Ni; 0,9-1,1 % Zn; 0,00-0,10 % Ti; 0,10-0,30 % W and 0,10-0,30 % V.
- Into hypo-eutectic silumin, wolfram and vanadium were introduced in the form of master alloy AlW8 and AlV10. Application of master alloys allows dissolution of W and V in silumin. Both wolfram and vanadium does not dissolve, in solid state aluminium, however they form with aluminium many varieties of intermetallic phases. Release of significant quantity of intermetallic phases in silumin, especially in the form of releases of relatively big sizes and complex morphology, results in increasing brittleness and decreasing its tensile strength Rm. Silumin crystallization process inside pressure casting die arises very intensively, which causes the possibility of supersaturation with wolfram and vanadium phase α. Phase α supersaturated with wolfram and vanadium may be characterized by higher mechanical properties in relation to solid solution α present in hypo-eutectic silumin without additive of W and V. Introduction of W and V additive into hypo-eutectic silumin for pressure die casting allows to obtain alloy with better mechanical properties in relation to commonly used in the range of this technology hypo-eutectic silumin alloys. Condition of obtaining hypo-eutectic silumin with additive of W and V of increased mechanical properties is supersaturation of solid solution α with wolfram and vanadium and avoidance of intermetallic phases release of relatively big sizes and complex morphology from equilibrium systems Al-W and Al-V.
- Pressure casting made from silumin in accordance with the invention presents high tensile strength Rm and high unit elongation A.
- The subject of the invention is illustrated with the example below, with reference to the
fig. 1 a-c , where microstructure of examined silumin alloys is presented. - Initial silumin was melted in the melting furnace heated with gas, with maximum charge capacity of 1,5 tons. The chemical composition of silumin was following:
% in weight Si Fe Cu Mn Mg Cr Ni Zn Ti Al 8,66 0,86 2,36 0,23 0,33 0,04 0,11 0,93 0,05 rest - After melting silumin was refined inside the furnace. Ecosal Al - 113S was used for refining in the amount of ca. 0,25 kg per 500 kg bath content. After tapping silumin from the furnace to the ladle of 300 kg Al alloy capacity, it was slagged with slag trap Ecremal N44. Into 300 kg of silumin poured off to the ladle, 1 (one) hand shank ZUDX-5501 0,20 kg of slag trap was added. After slagging silumin was transported to heating resistant furnace at the cold-chamber pressure die-casting machine with horizontal stamping chamber - Idra OL700S. Inside heating furnace composition of silumin was completed with master alloys containing vanadium and wolfram, and these were accordingly AlV10 and AlW8. Temperature of silumin inside heating furnace was 750 °C. In this temperature the alloy with master alloys was kept for 20 minutes. During this time period master alloy AlV10 and AlW8 were totally dissolved. Pressure castings were produced from 3 (three) silumin variants with additive of W and V. The amount of initial silumin and master alloys AlV10 and AlW8 was taken in such manner so the following chemical composition of three silumin variants with additive of W and V was obtained:
Silumin % in weight variant Si Fe Cu Mn Mg Cr Ni Zn Ti W V Al 1 8,66 0,81 2,52 ; 0,20 0,35 0,04 0,12 0,95 0,04 0,10 0,10 rest 2 8,40 0,87 2,32 0,22 0,33 0,03 0,11 0,91 0,04 0,20 0,20 rest 3 7,99 0,85 2,37 0,21 0,33 0,03 0,10 0,90 0,04 0,30 0,30 rest - The most of produced pressure casting were characterized by 2 mm wall thickness. From these castings samples for tensile strength testing were taken. These were flat samples with rectangular section dim. 2 mm / 10 mm. Tensile test was performed on testing machine
- Instron 3382. Applied tension velocity was 1 mm/min. During this test following factors were determined: tensile strength Rm, yield strength Rp0,2 and unit elongation A. Hardness was determined by Brinell method. For silumin alloys with additive of W and V the following values of mechanical properties were achieved:
Silumin Mechanical properties variant Rm, MPa Rp0,2, MPa A, % HB 1 275 119 4,4 114 2 299 119 6,3 114 3 299 117 5,7 113 - The microstructure of silumin with additive of W and V is presented on
fig. 1 (a-c). It is composed of solid solution of alloy addition in aluminium (α), ternary eutectic α+Al9Fe3Si2+β and quaternary eutectic α+Al2Cu+AlSiCuFeMgMnNiVW+β.
Claims (2)
- Hypo-eutectic silumin for pressure die casting in accordance with the invention is
characterized by its content of wolfram 0,1-0,3 % and vanadium 0,1-0,3 % in weight percentage. - Hypo-eutectic silumin for pressure die casting is non-characterized by its content of 7,5-8,7% Si; 0,7-1,2% Fe; 2,0- 3,0% Cu; 0,10-0,50% Mn; 0,05-0,50% Mg; 0,00-0,15 % Cr; 0,05-0,40 % Ni; 0,9-1,1 % Zn; 0,20-0,35 % Pb; 0,10-0,15 % Sn; 0,00-0,10 % Ti; 0,1-0,3 % W and 0,1-0,3 % V in weight percentage.
Priority Applications (1)
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EP15003706.7A EP3184659A1 (en) | 2015-12-23 | 2015-12-23 | Silumin for pressure die casting with additive of wolfram and vanadium |
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EP15003706.7A EP3184659A1 (en) | 2015-12-23 | 2015-12-23 | Silumin for pressure die casting with additive of wolfram and vanadium |
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EP3184659A1 true EP3184659A1 (en) | 2017-06-28 |
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EP15003706.7A Ceased EP3184659A1 (en) | 2015-12-23 | 2015-12-23 | Silumin for pressure die casting with additive of wolfram and vanadium |
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108486427A (en) * | 2018-03-27 | 2018-09-04 | 宁波优适捷传动件有限公司 | A kind of Novel aluminum alloy material and preparation method thereof |
CN109487127A (en) * | 2018-12-28 | 2019-03-19 | 佛山市南海雄新压铸有限公司 | A kind of pack alloy and its manufacture craft of corrosion-and high-temp-resistant |
CN110453115A (en) * | 2019-09-04 | 2019-11-15 | 东莞理工学院 | A kind of automotive speed changer die casting for shell aluminium alloy and its preparation process |
CN111485143A (en) * | 2020-03-19 | 2020-08-04 | 苏州杰源精密机械有限公司 | High-conductivity wire harness and preparation method thereof |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009132388A1 (en) * | 2008-04-30 | 2009-11-05 | Commonwealth Scientific And Industrial Research Organisation | Improved aluminium based casting alloy |
GB2526085A (en) * | 2014-05-12 | 2015-11-18 | Jaguar Land Rover Ltd | An alloy |
-
2015
- 2015-12-23 EP EP15003706.7A patent/EP3184659A1/en not_active Ceased
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009132388A1 (en) * | 2008-04-30 | 2009-11-05 | Commonwealth Scientific And Industrial Research Organisation | Improved aluminium based casting alloy |
GB2526085A (en) * | 2014-05-12 | 2015-11-18 | Jaguar Land Rover Ltd | An alloy |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108486427A (en) * | 2018-03-27 | 2018-09-04 | 宁波优适捷传动件有限公司 | A kind of Novel aluminum alloy material and preparation method thereof |
CN109487127A (en) * | 2018-12-28 | 2019-03-19 | 佛山市南海雄新压铸有限公司 | A kind of pack alloy and its manufacture craft of corrosion-and high-temp-resistant |
CN110453115A (en) * | 2019-09-04 | 2019-11-15 | 东莞理工学院 | A kind of automotive speed changer die casting for shell aluminium alloy and its preparation process |
CN110453115B (en) * | 2019-09-04 | 2021-11-19 | 东莞理工学院 | Novel automobile transmission shell die-casting aluminum alloy and preparation process thereof |
CN111485143A (en) * | 2020-03-19 | 2020-08-04 | 苏州杰源精密机械有限公司 | High-conductivity wire harness and preparation method thereof |
CN111485143B (en) * | 2020-03-19 | 2021-07-06 | 苏州杰源精密机械有限公司 | High-conductivity wire harness and preparation method thereof |
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