WO2016132995A1 - Matériau travaillé en alliage d'aluminium et son procédé de fabrication - Google Patents

Matériau travaillé en alliage d'aluminium et son procédé de fabrication Download PDF

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Publication number
WO2016132995A1
WO2016132995A1 PCT/JP2016/053995 JP2016053995W WO2016132995A1 WO 2016132995 A1 WO2016132995 A1 WO 2016132995A1 JP 2016053995 W JP2016053995 W JP 2016053995W WO 2016132995 A1 WO2016132995 A1 WO 2016132995A1
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mass
aluminum alloy
less
treatment
processed material
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PCT/JP2016/053995
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English (en)
Japanese (ja)
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政仁 谷津倉
慎吾 小泉
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日本軽金属株式会社
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Publication of WO2016132995A1 publication Critical patent/WO2016132995A1/fr

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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
    • C22C21/10—Alloys based on aluminium with zinc as the next major constituent
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
    • C22F1/053—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with zinc as the next major constituent

Definitions

  • the present invention relates to an aluminum alloy processed material and a manufacturing method thereof.
  • Aluminum alloy is an alloy mainly composed of aluminum.
  • Aluminum (Al) is a relatively light metal, but high-purity aluminum is very soft, so Cu (copper), Mn (manganese), Si (silicon), Mg (magnesium), Zn (zinc), Ni ( By forming an alloy with an additive such as nickel), characteristics such as desired strength, toughness, and ductility can be improved.
  • Al—Zn—Mg—Cu alloys are high strength alloys, and are utilized in various fields by taking advantage of the lightness and strength of aluminum alloys.
  • Patent Document 1 discloses an aircraft product composed of an aluminum alloy for the purpose of obtaining a good balance between toughness and static mechanical properties.
  • the technique of this document discloses adjusting the concentration and the like of the additive element for the purpose of obtaining a good balance of toughness, static mechanical properties, corrosion resistance, and elongation at break.
  • Patent Document 1 discloses that the toughness is improved by satisfying a condition such as Mg / Cu ⁇ 2.4 for the additive element of the aluminum alloy.
  • the main object of the present invention is to provide an aluminum alloy processed material having high strength and elongation characteristics and a method for producing the same.
  • Zn 9% by mass to 11% by mass
  • Mg 1.2% by mass to 2.0% by mass
  • Cu 2.0% by mass to 2.7% by mass
  • Zr 0 0.04% by mass or more and 0.25% by mass or less
  • Cr 0.02% by mass or more and 0.30% by mass or less
  • the contents of Zn and Mg are Zn / Aluminum alloy processed material satisfying the relationship of Mg ⁇ 4.7, the content of Mg and Cu satisfying the relationship of 3.2 mass% ⁇ Mg + Cu ⁇ 4.7 mass%, and having a plastic working structure Is provided.
  • the processed aluminum alloy material further includes Mn: 0.05% by mass or more and 0.40% by mass or less.
  • Zn 9% by mass or more and 11% by mass or less
  • Mg 1.2% by mass or more and 2.0% by mass or less
  • Cu 2.0% by mass or more and 2.7% by mass or less
  • Zr 0.04 mass% or more and 0.25 mass% or less
  • Cr 0.02 mass% or more and 0.30 mass% or less
  • the balance consists of Al and inevitable impurities
  • the contents of Zn and Mg are Zn /Mg ⁇ 4.7, satisfying the relationship of Mg and Cu content of 3.2 mass% ⁇ Mg + Cu ⁇ 4.7 mass%
  • plastic working, solution treatment, quenching treatment and aging treatment Are provided sequentially, and the manufacturing method of the aluminum alloy processed material characterized by the above-mentioned is provided.
  • the method for producing a processed aluminum alloy material further includes Mn: 0.05% by mass or more and 0.40% by mass or less.
  • thermoforming in the above-described method of manufacturing an aluminum alloy processed material, as plastic processing, hot extrusion with an extrusion ratio of 5 to 100 and ingot temperature of 300 to 450 ° C., 440 to 470 Solution treatment to be held at °C, quenching treatment to cool the range from 450 °C to 100 °C at a cooling rate of 1000 °C / min, aging treatment from 100 °C to 180 °C for 10 hours to 30 hours.
  • General aluminum materials tend to decrease ductility as strength increases, but structural materials are required to have high ductility as well as strength.
  • a material that breaks with a large plastic deformation when it is broken in a tensile test or the like, that is, a material with a large aperture has a large energy absorption.
  • the component range is defined in order to obtain high strength and high ductility.
  • Zn 9% by mass to 11% by mass
  • Mg 1.2% by mass to 2.0% by mass
  • Cu 2.0% by mass to 2.7% by mass
  • Cr 0.02% by mass or more and 0.30% by mass or less
  • the aluminum alloy processed material of this embodiment is an aluminum alloy processed material having high strength and elongation characteristics. Furthermore, you may contain Mn in 0.05 mass% or more and 0.40 mass% or less.
  • the content of Zn (zinc) is 9% by mass or more and 11% by mass or less.
  • the content of Mg is 1.2% by mass or more and 2.0% by mass or less. More preferably, the Mg content is 1.4% by mass or more and 2.0% by mass or less.
  • the aluminum alloy processed material of the present embodiment has a Cu (copper) content of 2.0 mass% or more and 2.7 mass% or less.
  • An aluminum alloy containing the above elements is subjected to an aging treatment after solution treatment, so that Zn and Mg form Zn—Mg-based precipitates (compounds such as MgZn 2 ).
  • Mg and Cu form Al—Cu—Mg-based precipitates (compounds such as Al 2 CuMg). Precipitation strengthening due to these precipitates contributes to the strength of the aluminum alloy.
  • the content of the above elements is less than 9% by mass of Zn, less than 1.2% by mass of Mg, and less than 2.0% by mass of Cu, precipitation strengthening cannot be sufficiently performed outside the lower limit range, and the aluminum alloy is not Less than desired strength.
  • the content of the above elements is more than 11% by mass of Zn, more than 2.0% by mass of Mg and more than 2.7% by mass of Cu, coarse precipitates are formed during plastic working, and solution treatment Since a crystallized substance that cannot be sufficiently dissolved by the treatment exists after the heat treatment, it becomes a starting point of fracture due to stress concentration, and reduces the elongation of the aluminum alloy.
  • Zn, Mg, and Cu are elements that contribute to strength, but it has been confirmed that strengthening with Zn-Mg-based precipitates maximizes the strength of the Al alloy.
  • the alloy components it is necessary to consider the contribution of castability and strength per added amount.
  • Zn has a high density, and when added excessively, the specific strength is lowered. Therefore, the Zn content is preferably 11% by mass or less from the viewpoints of castability and specific strength.
  • Zn / Mg which is the ratio of Zn to Mg, satisfies the relationship Zn / Mg> 4.7. More preferably, 4.7 ⁇ Zn / Mg ⁇ 9. If Zn / Mg is 4.7 or less, the influence of the precipitated phase and the Zn-Mg-based compound and Al-Cu-Mg-based compound crystallized at the crystal grain interface during casting cannot be dissolved in the Al matrix. High ductility cannot be obtained due to stress concentration at the crystal grain interface. When Zn / Mg is 9 or more, coarse precipitates are formed at the time of plastic working, and there are crystallized substances that cannot be sufficiently dissolved by the solution treatment after the heat treatment. Reduces the elongation of the aluminum alloy. In addition, cracks are likely to occur during casting.
  • the content of Mg and Cu is preferably 3.2 mass% ⁇ Mg + Cu ⁇ 4.7 mass%. If the Mg + Cu content is less than 3.2% by mass, the amount of Zn—Mg and Al—Cu—Mg based precipitates is insufficient, and precipitation strengthening cannot be obtained. If the Mg + Cu content exceeds 4.7%, Zn-Mg compounds and Al-Cu-Mg compounds cannot be dissolved in the Al matrix and high ductility cannot be obtained due to stress concentration at the interface. .
  • the content of Zr (zirconium) is 0.04 mass% or more and 0.25 mass% or less. More preferably, the Zr content is 0.10% by mass or more and 0.20% by mass or less.
  • the aluminum alloy processed material of this embodiment has a Cr (chromium) content of 0.02 mass% or more and 0.30 mass% or less. Furthermore, you may contain Mn in 0.05 mass% or more and 0.40 mass% or less.
  • Al-Zr-based dispersed particles, Al-Cr-based dispersed particles, or Al-Mn-based dispersed particles are formed during the homogenization treatment, thereby suppressing the movement of grain boundaries.
  • a so-called pinning effect that suppresses recrystallization occurs.
  • recrystallization is suppressed and the work structure formed at the time of plastic working is maintained even after the solution treatment, thereby contributing to the strength of the aluminum alloy.
  • the Zr content is less than 0.04% by mass and the Cr content is less than 0.02% by mass, the pinning effect cannot be obtained sufficiently and the strength cannot be contributed.
  • the content of the above elements is more than 0.25% by mass of Zr and more than 0.30% by mass of Cr, the coarse crystallized product is formed at the time of casting, and the elongation of the aluminum alloy is lowered. To do.
  • Cr, Zr and Mn are added in combination, Al—Cr-based dispersed particles and Al—Mn-based dispersed particles have an effect of enhancing stress corrosion cracking resistance.
  • the content is less than% and Mn is less than 0.05% by mass, this effect cannot be sufficiently obtained. This effect is thought to be due to the fact that Al—Cr-based dispersed particles and Al—Mn-based dispersed particles supplement hydrogen atoms.
  • the balance other than the above elements is made of Al and inevitable impurities.
  • the aluminum alloy contains other elements as unavoidable impurities derived from aluminum ingots. If the content of inevitable impurities is 0.15% by mass or less for Si, 0.20% by mass or less for Fe, and more preferably 0.10% by mass or less for both, the effect of the present invention is not hindered. preferable.
  • Ti and B may be added as a fine agent of the cast structure in order to prevent cracking of the ingot.
  • Zn 9% by mass to 11% by mass
  • Mg 1.2% by mass to 2.0% by mass
  • Cu 2.0% by mass to 2.7% by mass
  • Cr 0.02% by mass or more and 0.30% by mass or less
  • the contents of Zn and Mg are Satisfying the relationship of Zn / Mg ⁇ 4.7, the content of Mg and Cu satisfying the relationship of 3.2 mass% ⁇ Mg + Cu ⁇ 4.7 mass%, plastic working, solution treatment, quenching treatment and aging
  • Mn in 0.05 mass% or more and 0.40 mass% or less.
  • the composition has the above-described composition, and plastic processing, solution treatment, quenching treatment, and aging treatment are sequentially performed, so that high strength and elongation characteristics are obtained.
  • the processed aluminum alloy material can be manufactured.
  • plastic processing examples include rolling, forging, extrusion, and drawing.
  • the plastic working is preferably hot working for forming a processed structure.
  • the most preferable plastic working is hot extrusion under conditions where the extrusion ratio is 5 to 100 and the ingot temperature is 300 ° C. to 450 ° C. This is because the conditions are suitable for allowing the processed structure to remain until after the heat treatment. Further, after the extrusion process, plastic processing such as drawing or cutting may be performed in order to obtain a predetermined shape or size.
  • homogenization treatment for homogenizing the crystallized material segregated during casting and for forming Al-Zr, Al-Cr and Al-Mn precipitates ( (HO treatment) is more preferable. This is because this treatment affects the plastic workability and the formation of the processed structure.
  • the holding conditions at 460 ° C. (450 to 470 ° C.) for 24 hours, the elution elements such as Zn, Mg, and Cu can be homogenized and sufficient strength can be obtained by the subsequent heat treatment.
  • the holding temperature is increased too much, it may melt excessively. Further, the temperature rising rate is more preferably 50 ° C./h or less.
  • the heating rate is controlled to maintain the processed structure after the solution treatment.
  • solution treatment After the plastic working, solution treatment is performed.
  • the crystallized material is dissolved in the matrix by keeping the plastic working material at a high temperature.
  • the holding temperature during the solution treatment is preferably in the range of about 440 ° C to about 470 ° C. If the holding temperature is too high, local melting occurs and the strength of the plastic working material is reduced. On the other hand, if the holding temperature is low, Zn, Mg, and Cu cannot be sufficiently dissolved, so that sufficient precipitation strengthening cannot be obtained in the subsequent aging treatment.
  • a quenching process is performed after the solution treatment.
  • the quenching process is quickly cooled to room temperature by water cooling.
  • the cooling rate is preferably in the range of 450 ° C. to 100 ° C. at a rate of 1000 ° C./min or more, and then naturally aged at room temperature for 2 days.
  • An aging treatment is performed after the quenching treatment.
  • the plastic working material after quenching is heated and held at about 100 ° C. to about 180 ° C., so that Zn, Mg, and Cu that are supersaturated in the parent phase are changed into Zn—Mg compound and Al. -Precipitate finely and uniformly as an Mg-Cu compound to improve the strength of the plastic working material. If solution treatment or quenching treatment is not performed, the amount of Zn, Mg, Cu dissolved in supersaturation in the matrix is insufficient, and the amount of compounds that precipitate during aging treatment is reduced, improving strength. Is lacking.
  • the aging treatment condition (T6) for obtaining the highest strength is, for example, 100 to 130 ° C. for 10 to 30 hours, more preferably 110 to 120 ° C. for 12 to 25 hours.
  • an aging treatment of T73, T74, and T76 can be selected.
  • the extrusion ratio is 5 to 100
  • the ingot temperature is 300 ° C. to 450 ° C.
  • the hot extrusion processing is 440 ° C. to 470 ° C.
  • a solution treatment that is maintained at °C, a quenching treatment in which the range of 450 °C to 100 °C is cooled at a cooling rate of 1000 °C / min or more, and an aging treatment at 100 °C to 180 °C for 10 hours to 30 hours are sequentially performed.
  • Zn 9% by mass to 11% by mass
  • Mg 1.2% by mass to 2.0% by mass
  • Cu 2.0% by mass to 2.7% by mass
  • Cr 0.02% by mass or more and 0.30% by mass or less
  • the contents of Zn and Mg are Satisfying the relationship of Zn / Mg ⁇ 4.7, the content of Mg and Cu satisfying the relationship of 3.2 mass% ⁇ Mg + Cu ⁇ 4.7 mass%, plastic working, solution treatment, quenching treatment and aging
  • the aluminum alloy processed material is characterized by being sequentially processed.
  • the aluminum alloy processed material of the present embodiment has the above composition, and can be made into a high-strength aluminum alloy processed material by sequentially performing plastic processing, solution treatment, quenching treatment, and aging treatment. .
  • the extrusion ratio is 5 to 100
  • the ingot temperature is 300 to 450 degreeC hot extrusion, and it hold
  • a solution treatment, a quenching treatment in which a range of 450 ° C. to 100 ° C. is cooled at a cooling rate of 1000 ° C./min or more, and an aging treatment at 100 ° C. to 180 ° C. for 10 hours to 30 hours are sequentially performed.
  • the main crystal grain structure of the aluminum alloy processed material is a processed structure such as a fibrous structure.
  • a recrystallized structure may be generated in the structure of the outer peripheral portion, but it is preferable to control the thickness of the recrystallized to 1.0 mm or less.
  • the aluminum alloy processed material according to the above-described embodiment can be used as a component such as leisure goods such as sports, industrial equipment, and automotive parts.
  • Sample materials were obtained by extruding each ingot of the above components A to I.
  • the extruded material had a diameter of 25 mm and was formed by two vertical and indirect extrusion methods.
  • the extrusion conditions were an ingot temperature of 380 ° C. and an extrusion speed of 1 m / min.
  • the extrusion ratio is 52.
  • solution treatment was performed.
  • the solution temperature was 460 ° C. for 2 hours. Thereafter, it was quickly cooled with water and naturally aged at room temperature for 3 days (quenching treatment). Thereafter, artificial aging was performed at 120 ° C. for 24 hours.
  • compositions of Examples A and B satisfy the provisions of the present invention.
  • compositions of Examples C to I are outside the scope of the present invention.
  • the strength of the aluminum alloy test material was evaluated by a tensile test.
  • the tensile test was carried out by processing a JIS14A tensile test piece.
  • the parallel part shape of the test piece was 10 mm in diameter and 60 mm in length, and the distance between the gauge points was 50 mm.
  • the tensile test was performed according to JIS2201. The results of the tensile test are shown in [Table 2].
  • the recrystallized structure produced on the outer peripheral portion of the extruded material was polished with a modified Tucker solution after polishing the extruded LT cross section, observed with a stereomicroscope, and the thickness thereof was measured.
  • a and B satisfy the conditions that the tensile strength is 720 MPa or more, the 0.2% proof stress is 700 MPa or more, the elongation is 13% or more, and the drawing is 25% or more. Passed. From this result, it can be seen that the aluminum alloy processed material defined in the present invention can provide sufficient strength and good elongation and drawing characteristics.
  • the elongation and the aperture do not satisfy the above criteria. This is because the addition amount of Cu and Cr and Zn / Mg are less than the lower limit values specified in the present invention, and the addition amount of Mg is larger than the upper limit value specified in the present invention, so that the increase in crystallization and precipitation This is probably due to the organization.
  • the elongation and aperture do not satisfy the above criteria. This is considered to be because the addition amount of Cu and Zn / Mg are less than the lower limit value specified in the present invention, and the addition amount of Mg is larger than the upper limit value specified in the present invention.
  • E elongation and drawing do not satisfy the above criteria.
  • the elongation and aperture do not satisfy the above criteria. This is because the added amount of Zn and Zn / Mg are less than the lower limit values specified in the present invention, and the added amount of Mg and Cu + Mg are larger than the upper limit values specified in the present invention. This is probably due to the organization.
  • the elongation and aperture do not satisfy the above criteria. This is because the addition amount of Zn and Mg is larger than the upper limit value defined in the present invention, and the addition amount of Cu is less than the lower limit value defined in the present invention, so the result of increase in crystallized matter and precipitation structure it is conceivable that.
  • H the elongation and the drawing do not satisfy the above criteria.
  • the aluminum alloy processed material satisfying the composition specified in the present invention has higher strength and elongation characteristics than the aluminum alloy processed material not satisfying the composition specified in the present invention.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
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Abstract

La présente invention a pour objet principal un matériau travaillé en alliage d'aluminium qui a de hautes résistance et caractéristiques d'allongement et un procédé de fabrication de ce dernier. À cet effet, l'invention porte sur un matériau travaillé en alliage d'aluminium, et un procédé de fabrication de ce dernier, qui est caractérisé en ce qu'il contient 9 à 11 % en masse de Zn ; 1,2 à 2,0 % en masse de Mg ; 2,0 à 2,7 % en masse de Cu ; 0,04 à 0,25 % en masse de Zr ; et 0,02 à 0,30 % en masse de Cr, le reste étant de l'Al et des impuretés inévitables, les teneurs en Zn et Mg satisfaisant à la relation Zn/Mg ≧ 4,7, les teneurs en Mg et Cu satisfaisant à la condition 3,2 % en masse ≤ Mg + Cu ≤ 4,7 % en masse et le matériau présentant une structure travaillée plastique.
PCT/JP2016/053995 2015-02-20 2016-02-10 Matériau travaillé en alliage d'aluminium et son procédé de fabrication WO2016132995A1 (fr)

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JP2015-031365 2015-02-20

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08295977A (ja) * 1995-04-21 1996-11-12 Sumitomo Light Metal Ind Ltd 疲労強度に優れた高強度アルミニウム合金押出材および該押出材からなるオートバイフロントフォークアウターチューブ材
JP2005530032A (ja) * 2002-04-05 2005-10-06 ペシネイ　レナリュ 機械的特性が極めて高いＡｌ−Ｚｎ−Ｍｇ−Ｃｕ合金製熱間加工製品、および航空機の構造要素
JP2009013479A (ja) * 2007-07-06 2009-01-22 Nippon Light Metal Co Ltd 耐応力腐食割れ性に優れた高強度アルミニウム合金材及びその製造方法
CN102732761A (zh) * 2012-06-18 2012-10-17 中国航空工业集团公司北京航空材料研究院 一种7000系铝合金材料及其制备方法
JP2014037557A (ja) * 2012-08-10 2014-02-27 Nippon Light Metal Co Ltd アルミニウム−亜鉛系合金押出材およびその製造方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08295977A (ja) * 1995-04-21 1996-11-12 Sumitomo Light Metal Ind Ltd 疲労強度に優れた高強度アルミニウム合金押出材および該押出材からなるオートバイフロントフォークアウターチューブ材
JP2005530032A (ja) * 2002-04-05 2005-10-06 ペシネイ　レナリュ 機械的特性が極めて高いＡｌ−Ｚｎ−Ｍｇ−Ｃｕ合金製熱間加工製品、および航空機の構造要素
JP2009013479A (ja) * 2007-07-06 2009-01-22 Nippon Light Metal Co Ltd 耐応力腐食割れ性に優れた高強度アルミニウム合金材及びその製造方法
CN102732761A (zh) * 2012-06-18 2012-10-17 中国航空工业集团公司北京航空材料研究院 一种7000系铝合金材料及其制备方法
JP2014037557A (ja) * 2012-08-10 2014-02-27 Nippon Light Metal Co Ltd アルミニウム−亜鉛系合金押出材およびその製造方法

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