EP0366134A1 - Aluminum alloy useful in powder metallurgy process - Google Patents

Aluminum alloy useful in powder metallurgy process Download PDF

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Publication number
EP0366134A1
EP0366134A1 EP89119912A EP89119912A EP0366134A1 EP 0366134 A1 EP0366134 A1 EP 0366134A1 EP 89119912 A EP89119912 A EP 89119912A EP 89119912 A EP89119912 A EP 89119912A EP 0366134 A1 EP0366134 A1 EP 0366134A1
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Prior art keywords
weight
aluminum alloy
aluminum
species
total amount
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EP89119912A
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German (de)
French (fr)
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EP0366134B1 (en
Inventor
Jun Kusui
Masahiko Kawai
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Toyo Aluminum KK
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Toyo Aluminum KK
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Priority claimed from JP1265610A external-priority patent/JPH03177530A/en
Application filed by Toyo Aluminum KK filed Critical Toyo Aluminum KK
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/04—Making non-ferrous alloys by powder metallurgy
    • C22C1/0408—Light metal alloys
    • C22C1/0416—Aluminium-based alloys
    • 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

Definitions

  • the present invention relates to an aluminum alloy which provides a product having a highly improved strength at elevated temperatures and remarkable resistance to creep when used in powder metallurgy process.
  • P/M process Products of aluminum alloy prepared by powder metallurgy process (hereinafter referred to as "P/M process”) exhibit highly improved heat resistance, wear resistance, and like properties in comparison with the products prepared by ingot metallurgy process (hereinafter referred to as "IM process”) because the products by P/M process can contain additional elements in larger amounts with no segregation and much more uniformly dispersed in aluminum matrix than the products prepared by IM process.
  • IM process ingot metallurgy process
  • P/M aluminum alloy products are usually produced by hot extrusion of a powdery, flaky or ribbon-like quickly solidified material to obtain a billet and processing the billet to the desired shapes or forms.
  • the oxide films on the surfaces of powder particles, flakes or ribbons are fractured and the exposed inner aluminum portions are pressed each other to form strong bonding.
  • powder-­rolling process and powder-forging process which also belong to a general category of P/M process, aluminum oxide films are fractured; however, since shearing force is relatively small and deformation of each particle is not so large and uniform as in the case of extrusion, the bond between particles is not so strong as in the extruded product.
  • the extrusion ratio in conducting the above extrusion by P/M process is usually 10 or more, preferably 20 or more to obtain a strong bonding of each particle.
  • the extrusion by P/M process usually requires much higher forces than the extrusion by IM process because the aluminum alloy used in the former process contain larger amounts of alloying elements. For these limitations, aluminum alloy materials obtained by P/M process are difficult to employ for producing large-sized products.
  • An object of the invention is to provide a P/M aluminum alloy which can be extruded under a low extrusion ratio of 10 or lower.
  • Another object of the invention is to provide a P/M aluminum alloy which can be extruded even under an extremely low extrusion ratio of 2 to 5.
  • Still another object of the invention is to provide a P/M aluminum alloy capable of producing an extruded product excellent in strengths at high temperatures and resistance to creep.
  • the present invention provides a P/M aluminum alloy consisting essentially of (a) 5 to 30% by weight of Si, (b) 0.5 to 10% by weight of at least one species selected from the group consisting of Fe, Ni, Cr and Mn with the proviso that the total amount of these species cannot exceed 20% by weight, (c) 0.3 to 3% by weight of at least one species selected from the group consisting of Mo, Zr, V and Ti with the proviso that the total amount of these species cannot exeed 5% by weight, and (d) aluminum in a remaining amount.
  • the aluminum alloys used in the invention contain as alloying elements (a) 5 to 30% by weight or Si, (b) 0.5 to 10% by weight of at least one species selected from the group consisting of Fe, Ni, Cr and Mn with the proviso that the total amount of these species cannot exceed 20% by weight and (c) 0.3 to 3% by weight of at least one species selected from the group consisting of Mo, Zr, V and Ti with the proviso that the total amount of these species cannot exceed 5% by weight.
  • the aluminum alloys of the invention with the above specific components are extruded, the powder particles are strongly bonded each other even at a low extrusion ratio and the extruded material exhibits substantially uniform strength and elongation irrespective of the extrusion ratio. If an aluminum alloy powder with the composition outside the above specified range is used, an extruded material with strong bonding cannot be obtained at a low extrusion ratio of 10 or 5 to 2 at a temperature of 400 to 500°C.
  • the amount of Si is less than 5% by weight of the alloy, the bonding strength of the particles is low; whereas the use of Si of more than 30% by weight results in the excess volume of primary Si particles in the matrix which leads to a reduction in the toughness of the alloy.
  • Fe, Ni, Cr and Mn mainly contribute to the improvement of heat resistance and strength.
  • the amount of at least one of Fe, Ni, Cr and Mn in less than 0.5% by weight results in inferior heat resistance and strength of the extruded material whereas the amount thereof in more than 10% by weight results in lower toughness with the formation of coarse intermetallic compounds.
  • the total amount of these alloying elements in excess of 20% by weight also leads to a reduction of toughness of the alloy.
  • Mo, Zr, V and Ti mainly contribute to the improvement of heat resistance and creep resistance.
  • the amount of at least one of Mo, Zr, V and Ti in less than 0.3% by weight does not significantly improve the resistance to heat and creep.
  • the amount thereof exceeds 3% by weight coarse intermetallic compounds are formed to lower the toughness of the alloy.
  • the total amount is up to 5% by weight of the alloy to prevent the formation of coarse intermetallic compounds which lead to reduced toughness.
  • the aluminum alloy of the invention contains 5 to 30% by weight of Si, 2 to 5% by weight of Fe, 2 to 5% by weight of Hi and 1 to 3% by weight of Mo.
  • the aluminum alloy of the invention containing alloying elements in the preferable ranges exhibits balanced properties of the high strengths at elevated temperatures, resistance to creep and toughness.
  • the aluminum alloy of the invention contains 5 to 30% by weight of Si, 2 to 5% by of Fe, 2 to 5% by weight of Ni, 0.5 to 3% by weight of Mo and 0.5 to 3% by weight of Zr provided that the total amount of Mo and Zr is more than 2% by weight and less than 5% by weight.
  • the aluminum alloy of the invention containing alloying elements in the more preferable ranges shows much more balanced properties of the improved strengths, toughness and resistance to creep at elevated temperatures.
  • the aluminum alloys with alloying elements in a more preferable range are most useful as the materials for machine components, etc.
  • the extruded product formed from the aluminum alloy of the invention exhibits high resistance to heat and creep.
  • Table 1 Aluminum alloys containing alloying elements as indicated Table 1 below were air-atomized into particles and sieved to prepare powders of minus 100 mesh.
  • Each of the aluminum alloy powders thus prepared was cold pressed to a preform 30 mm in diameter and 80 mm in height and then extruded at 450°C at an extrusion ratio of 3. Test pieces were prepared from the extruded materials, and tensile tests and creep tests were conducted at 300°C.
  • rupture time indicates a period of time required for a test piece to rupture when it is exposed to a stress of 8 kg/mm2 at 300°C.
  • Table 2 indicates that the extruded materials obtained from the aluminum alloys of the invention (Nos.1 to 16) have high tensile strength and elongation and exhibit good resistance to creep. Particularly, the extruded products produced from alloy Nos.13 to 16 are balanced in resistance to creep, tensile strength at elevated temperatures and toughness.

Abstract

The present invention provides an aluminum alloy consisting essentially of
  • (a) 5 to 30% by weight of Si,
  • (b) 0.5 to 10% by weight of at least one species selected from the group consisting of Fe, Ni, Cr and Mn with the proviso that the total amount of these species cannot exceed 20% by weight,
  • (c) 0.3 to 3% by weight of at least one species selected from the group consisting of Mo, Zr, V and Ti with the proviso that the total amount of these species cannot exceed 5% by weight, and
  • (d) aluminum in a remaining amount.
An aluminium alloy product produced by extruding said alloy is excellent in strength at high temperatures and resistance to creep.

Description

  • The present invention relates to an aluminum alloy which provides a product having a highly improved strength at elevated temperatures and remarkable resistance to creep when used in powder metallurgy process.
  • Products of aluminum alloy prepared by powder metallurgy process (hereinafter referred to as "P/M process") exhibit highly improved heat resistance, wear resistance, and like properties in comparison with the products prepared by ingot metallurgy process (hereinafter referred to as "IM process") because the products by P/M process can contain additional elements in larger amounts with no segregation and much more uniformly dispersed in aluminum matrix than the products prepared by IM process.
  • Conventional P/M aluminum alloy products are usually produced by hot extrusion of a powdery, flaky or ribbon-like quickly solidified material to obtain a billet and processing the billet to the desired shapes or forms. During the hot extrusion step, the oxide films on the surfaces of powder particles, flakes or ribbons are fractured and the exposed inner aluminum portions are pressed each other to form strong bonding. In powder-­rolling process and powder-forging process which also belong to a general category of P/M process, aluminum oxide films are fractured; however, since shearing force is relatively small and deformation of each particle is not so large and uniform as in the case of extrusion, the bond between particles is not so strong as in the extruded product.
  • The extrusion ratio in conducting the above extrusion by P/M process is usually 10 or more, preferably 20 or more to obtain a strong bonding of each particle. The extrusion by P/M process usually requires much higher forces than the extrusion by IM process because the aluminum alloy used in the former process contain larger amounts of alloying elements. For these limitations, aluminum alloy materials obtained by P/M process are difficult to employ for producing large-sized products.
  • Further, aluminum alloys conventionally used in P/M process gives a product which cannot fully meet the severe requirements such as high strengths at elevated temperatures up to 300°C, high resistance to creep, etc.
  • An object of the invention is to provide a P/M aluminum alloy which can be extruded under a low extrusion ratio of 10 or lower.
  • Another object of the invention is to provide a P/M aluminum alloy which can be extruded even under an extremely low extrusion ratio of 2 to 5.
  • Still another object of the invention is to provide a P/M aluminum alloy capable of producing an extruded product excellent in strengths at high temperatures and resistance to creep.
  • Other objects and features of the invention will become apparent from the following description.
  • The present invention provides a P/M aluminum alloy consisting essentially of (a) 5 to 30% by weight of Si, (b) 0.5 to 10% by weight of at least one species selected from the group consisting of Fe, Ni, Cr and Mn with the proviso that the total amount of these species cannot exceed 20% by weight, (c) 0.3 to 3% by weight of at least one species selected from the group consisting of Mo, Zr, V and Ti with the proviso that the total amount of these species cannot exeed 5% by weight, and (d) aluminum in a remaining amount.
  • We conducted extensive research to obviate the prior art problems as mentioned above and found that these problems can be markedly alleviated by use of powdery aluminum alloy comprising specific alloying elements. The present invention has been accomplished on the basis of this novel finding.
  • The aluminum alloys used in the invention contain as alloying elements (a) 5 to 30% by weight or Si, (b) 0.5 to 10% by weight of at least one species selected from the group consisting of Fe, Ni, Cr and Mn with the proviso that the total amount of these species cannot exceed 20% by weight and (c) 0.3 to 3% by weight of at least one species selected from the group consisting of Mo, Zr, V and Ti with the proviso that the total amount of these species cannot exceed 5% by weight. When the aluminum alloys of the invention with the above specific components are extruded, the powder particles are strongly bonded each other even at a low extrusion ratio and the extruded material exhibits substantially uniform strength and elongation irrespective of the extrusion ratio. If an aluminum alloy powder with the composition outside the above specified range is used, an extruded material with strong bonding cannot be obtained at a low extrusion ratio of 10 or 5 to 2 at a temperature of 400 to 500°C.
  • Stated more specifically, if the amount of Si is less than 5% by weight of the alloy, the bonding strength of the particles is low; whereas the use of Si of more than 30% by weight results in the excess volume of primary Si particles in the matrix which leads to a reduction in the toughness of the alloy.
  • Fe, Ni, Cr and Mn mainly contribute to the improvement of heat resistance and strength. The amount of at least one of Fe, Ni, Cr and Mn in less than 0.5% by weight results in inferior heat resistance and strength of the extruded material whereas the amount thereof in more than 10% by weight results in lower toughness with the formation of coarse intermetallic compounds. The total amount of these alloying elements in excess of 20% by weight also leads to a reduction of toughness of the alloy.
  • Mo, Zr, V and Ti mainly contribute to the improvement of heat resistance and creep resistance. The amount of at least one of Mo, Zr, V and Ti in less than 0.3% by weight does not significantly improve the resistance to heat and creep. On the other hand, when the amount thereof exceeds 3% by weight, coarse intermetallic compounds are formed to lower the toughness of the alloy. When two or more of Mo, Zr, V and Ti are used, the total amount is up to 5% by weight of the alloy to prevent the formation of coarse intermetallic compounds which lead to reduced toughness.
  • Preferably, the aluminum alloy of the invention contains 5 to 30% by weight of Si, 2 to 5% by weight of Fe, 2 to 5% by weight of Hi and 1 to 3% by weight of Mo. The aluminum alloy of the invention containing alloying elements in the preferable ranges exhibits balanced properties of the high strengths at elevated temperatures, resistance to creep and toughness.
  • More preferably, the aluminum alloy of the invention contains 5 to 30% by weight of Si, 2 to 5% by of Fe, 2 to 5% by weight of Ni, 0.5 to 3% by weight of Mo and 0.5 to 3% by weight of Zr provided that the total amount of Mo and Zr is more than 2% by weight and less than 5% by weight.
  • The aluminum alloy of the invention containing alloying elements in the more preferable ranges shows much more balanced properties of the improved strengths, toughness and resistance to creep at elevated temperatures. Thus, the aluminum alloys with alloying elements in a more preferable range are most useful as the materials for machine components, etc.
  • When the aluminum alloy of the invention is extruded at a temperature between 400 to 500°C, a very strong bond can be produced in an extruded material at a low extrusion ratio of 10 or less, or even at a very low extrusion ratio of 2 to 5.
  • The extruded product formed from the aluminum alloy of the invention exhibits high resistance to heat and creep.
    • EXAMPLES
  • Given below are Examples to clarify the features of the invention in greater detail.
    • Example 1
  • Aluminum alloys containing alloying elements as indicated Table 1 below were air-atomized into particles and sieved to prepare powders of minus 100 mesh. Table 1
    No. Alloying Elements (wt.%)
    Si Fe Ni Cr Mn Mo Zr V Ti
    1 6 5 3 2
    2 12 1 1 1 1 2
    3 12 5 3 0.7
    4 12 5 3 2
    5 12 5 3 2
    6 12 5 3 2
    7 12 5 3 2
    8 17 5 3 1
    9 17 5 3 1
    10 20 3 3 2
    11 20 5 3 1
    12 25 4 5 1
    13 12 5 3 2.5
    14 12 5 3 1 1.5
    15 12 5 3 2 1.5
    16 12 5 3 2.5 1.5
    17 12 5 3
    18 17 3 3
    19 12 0.3 0.1 2 2
    20 1.2 1.0 (Cu=2.5 mg=1.5) 0.1
  • Each of the aluminum alloy powders thus prepared was cold pressed to a preform 30 mm in diameter and 80 mm in height and then extruded at 450°C at an extrusion ratio of 3. Test pieces were prepared from the extruded materials, and tensile tests and creep tests were conducted at 300°C.
  • In Table 2, "rupture time" indicates a period of time required for a test piece to rupture when it is exposed to a stress of 8 kg/mm² at 300°C.
  • Results are given in Table 2 below. Table 2
    No. Tensile strength (kg/mm²) Elongation (%) Rupture time (Hr)
    1 20.3 11.0 1020
    2 21.3 13.0 1187
    3 20.8 12.5 258
    4 22.0 10.5 3610
    5 23.0 4.2 105
    6 22.2 2.3 421
    7 22.5 1.5 358
    8 25.0 1.8 2563
    9 21.3 5.9 125
    10 23.2 1.2 2054
    11 24.8 1.8 1823
    12 23.5 1.9 435
    13 24.5 9.1 4350
    14 24.7 8.9 2895
    15 26.1 7.1 4568
    16 27.1 4.5 5015
    17 19.5 15.7 2.6
    18 20.3 15.3 2.2
    19 14.2 17.9 0.3
    20 9.8 22.7 1.3
  • Table 2 indicates that the extruded materials obtained from the aluminum alloys of the invention (Nos.1 to 16) have high tensile strength and elongation and exhibit good resistance to creep. Particularly, the extruded products produced from alloy Nos.13 to 16 are balanced in resistance to creep, tensile strength at elevated temperatures and toughness.
  • In contrast, aluminum alloys containing alloying elements in amounts outside the range of the invention (Nos.17 to 20) give products low in tensile strength at 300°C and short in rupture time. It is noted that the alloy No.20 which is known to be highly resistant to heat among conventional IM materials is extremely inferior to the alloys of the invention in the strength and resistance to creep at 300°C.

Claims (6)

1. An aluminum alloy consisting essentially of
(a) 5 to 30% by weight of Si,
(b) 0.5 to 10% by weight of at least one species selected from the group consisting of Fe, Ni, Cr and Mn with the proviso that the total amount of these species cannot exceed 20% by weight,
(c) 0.3 to 3% by weight of at least one species selected from the group consisting of Mo, Zr, V and Ti with the proviso that the total amount of these species cannot exceed 5% by weight, and
(d) aluminum in a remaining amount.
2. An aluminum alloy according to claim 1 which comprises 5 to 30% by weight of Si, 2 to 5% by weight of Fe, 2 to 5% by weight of Ni, 1 to 3% by weight of Mo and aluminum in a remaining amount.
3. An aluminum alloy according to claim 1 which comprises 5 to 30% by weight of Si, 2 to 5% by weight of Fe, 2 to 5% by weight of Ni, 0.5 to 3% by weight of Mo, 0.5 to 3% by weight of Zr and aluminum in a remaining amount provided that the total amount of Mo and Zr is in the range of more than 2% by weight and less than 5% by weight.
4. An aluminum alloy product produced by extruding an aluminum alloy material in powdery form consisting essentially of
(a) 5 to 30% by weight of Si,
(b) 0.5 to 10% by weight of at least one species selected from the group consisting of Fe, Ni, Cr and Mn with the proviso that the total amount of these species cannot exceed 20% by weight,
(c) 0.3 to 3% by weight of at least one species selected from the group consisting of Mo, Zr, V and Ti with the proviso that the total amount of these species cannot exceed 5% by weight, and
(d) aluminum in a remaining amount.
5. An aluminum alloy product according to claim 4 wherein the aluminum alloy material is extruded at a temperature between 400 to 500°C and at an extrusion ratio of 2 to 10.
6. An aluminum alloy product according to claim 5 wherein the aluminum alloy material is extruded at an extrusion ratio of 2 to 5.
EP89119912A 1988-10-27 1989-10-26 Aluminum alloy useful in powder metallurgy process Expired - Lifetime EP0366134B1 (en)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP272167/88 1988-10-27
JP27216788 1988-10-27
JP25432489 1989-09-28
JP254324/89U 1989-09-28
JP1265610A JPH03177530A (en) 1988-10-27 1989-10-11 Heat-resistant and creep-resistant aluminum alloy
JP265610/89U 1989-10-11

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EP0366134A1 true EP0366134A1 (en) 1990-05-02
EP0366134B1 EP0366134B1 (en) 1994-01-19

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0561204A2 (en) * 1992-03-04 1993-09-22 Toyota Jidosha Kabushiki Kaisha Heat-resistant aluminum alloy powder, heat-resistant aluminum alloy and heat- and wear-resistant aluminum alloy-based composite material
FR2690927A1 (en) * 1992-05-06 1993-11-12 Pechiney Aluminium Aluminium@ alloy - contains silicon, and either magnesium@, copper@ or nickel@ with titanium@, zirconium@ and vanadium@ to increase hot creep resistance
US5409661A (en) * 1991-10-22 1995-04-25 Toyota Jidosha Kabushiki Kaisha Aluminum alloy
US5464463A (en) * 1992-04-16 1995-11-07 Toyota Jidosha Kabushiki Kaisha Heat resistant aluminum alloy powder heat resistant aluminum alloy and heat and wear resistant aluminum alloy-based composite material
WO1997009457A1 (en) * 1995-09-01 1997-03-13 Erbslöh Aktiengesellschaft Process for manufacturing thin pipes
WO1997009459A1 (en) * 1995-09-01 1997-03-13 Erbslöh Aktiengesellschaft Process for manufacturing thin pipes
WO1997009458A1 (en) * 1995-09-01 1997-03-13 Erbslöh Aktiengesellschaft Process for manufacturing thin pipes
US5614036A (en) * 1992-12-03 1997-03-25 Toyota Jidosha Kabushiki Kaisha High heat resisting and high abrasion resisting aluminum alloy
WO2006042509A1 (en) * 2004-10-15 2006-04-27 Peak Werkstoff Gmbh Aluminium-based alloy and moulded part consisting of said alloy
CN107034391A (en) * 2017-03-28 2017-08-11 龙口市大川活塞有限公司 A kind of aluminium alloys for pistons and preparation method thereof
WO2018185259A1 (en) * 2017-04-05 2018-10-11 Amag Casting Gmbh Starting material, use thereof, and additive manufacturing process using said starting material

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CN111534727A (en) * 2020-05-07 2020-08-14 江苏兆铝金属制品有限公司 Special aluminum alloy material for high-strength car lamp and preparation method thereof

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EP0100470A2 (en) * 1982-07-12 1984-02-15 Showa Denko Kabushiki Kaisha Heat-resistant, wear-resistant, and high-strength aluminum alloy powder and body shaped therefrom
EP0112787A1 (en) * 1982-12-08 1984-07-04 Cegedur Societe De Transformation De L'aluminium Pechiney Heat resistant and processable inserts for diesel engine pistons made of aluminium-silicium alloys
EP0265307A1 (en) * 1986-09-22 1988-04-27 Automobiles Peugeot Process for manufacturing shaped bodies from hypereutectic aluminium-silicon alloys, starting from powders obtained by rapid cooling

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EP0112787A1 (en) * 1982-12-08 1984-07-04 Cegedur Societe De Transformation De L'aluminium Pechiney Heat resistant and processable inserts for diesel engine pistons made of aluminium-silicium alloys
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Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5409661A (en) * 1991-10-22 1995-04-25 Toyota Jidosha Kabushiki Kaisha Aluminum alloy
EP0561204A2 (en) * 1992-03-04 1993-09-22 Toyota Jidosha Kabushiki Kaisha Heat-resistant aluminum alloy powder, heat-resistant aluminum alloy and heat- and wear-resistant aluminum alloy-based composite material
EP0561204A3 (en) * 1992-03-04 1993-11-24 Toyota Motor Co Ltd Heat-resistant aluminum alloy powder, heat-resistant aluminum alloy and heat- and wear-resistant aluminum alloy-based composite material
US5374295A (en) * 1992-03-04 1994-12-20 Toyota Jidosha Kabushiki Kaisha Heat resistant aluminum alloy powder, heat resistant aluminum alloy and heat and wear resistant aluminum alloy-based composite material
US5464463A (en) * 1992-04-16 1995-11-07 Toyota Jidosha Kabushiki Kaisha Heat resistant aluminum alloy powder heat resistant aluminum alloy and heat and wear resistant aluminum alloy-based composite material
FR2690927A1 (en) * 1992-05-06 1993-11-12 Pechiney Aluminium Aluminium@ alloy - contains silicon, and either magnesium@, copper@ or nickel@ with titanium@, zirconium@ and vanadium@ to increase hot creep resistance
US5614036A (en) * 1992-12-03 1997-03-25 Toyota Jidosha Kabushiki Kaisha High heat resisting and high abrasion resisting aluminum alloy
WO1997009458A1 (en) * 1995-09-01 1997-03-13 Erbslöh Aktiengesellschaft Process for manufacturing thin pipes
WO1997009459A1 (en) * 1995-09-01 1997-03-13 Erbslöh Aktiengesellschaft Process for manufacturing thin pipes
WO1997009457A1 (en) * 1995-09-01 1997-03-13 Erbslöh Aktiengesellschaft Process for manufacturing thin pipes
US6030577A (en) * 1995-09-01 2000-02-29 Erbsloh Aktiengesellschaft Process for manufacturing thin pipes
US6086819A (en) * 1995-09-01 2000-07-11 Erbsloh Aktiengesellschaft Process for manufacturing thin-walled pipes
US6136106A (en) * 1995-09-01 2000-10-24 Erbsloh Aktiengesellschaft Process for manufacturing thin pipes
WO2006042509A1 (en) * 2004-10-15 2006-04-27 Peak Werkstoff Gmbh Aluminium-based alloy and moulded part consisting of said alloy
CN101087895B (en) * 2004-10-15 2010-12-08 Peak材料有限责任公司 Aluminium-based alloy and moulded part consisting of said alloy
CN107034391A (en) * 2017-03-28 2017-08-11 龙口市大川活塞有限公司 A kind of aluminium alloys for pistons and preparation method thereof
CN107034391B (en) * 2017-03-28 2018-12-25 龙口市大川活塞有限公司 A kind of aluminium alloys for pistons and preparation method thereof
WO2018185259A1 (en) * 2017-04-05 2018-10-11 Amag Casting Gmbh Starting material, use thereof, and additive manufacturing process using said starting material
US11597984B2 (en) 2017-04-05 2023-03-07 Amag Casting Gmbh Starting material, use thereof, and additive manufacturing process using said starting material

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