WO2003095691A1 - Feuille de magnesium mince malleable presentant une excellente aptitude au façonnage et procede de production de cette derniere - Google Patents

Feuille de magnesium mince malleable presentant une excellente aptitude au façonnage et procede de production de cette derniere Download PDF

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Publication number
WO2003095691A1
WO2003095691A1 PCT/JP2003/005627 JP0305627W WO03095691A1 WO 2003095691 A1 WO2003095691 A1 WO 2003095691A1 JP 0305627 W JP0305627 W JP 0305627W WO 03095691 A1 WO03095691 A1 WO 03095691A1
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WO
WIPO (PCT)
Prior art keywords
rolling
weight
sheet
workability
tensile strength
Prior art date
Application number
PCT/JP2003/005627
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English (en)
Japanese (ja)
Inventor
Hiroaki Okamoto
Kengo Iwanaga
Keiici Shimizu
Original Assignee
Toyo Kohan Co., Ltd.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toyo Kohan Co., Ltd. filed Critical Toyo Kohan Co., Ltd.
Priority to AU2003231403A priority Critical patent/AU2003231403A1/en
Publication of WO2003095691A1 publication Critical patent/WO2003095691A1/fr

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Classifications

    • 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
    • C22F1/06—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of magnesium or alloys based thereon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C23/00—Alloys based on magnesium
    • C22C23/02—Alloys based on magnesium with aluminium as the next major constituent
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C23/00—Alloys based on magnesium
    • C22C23/04—Alloys based on magnesium with zinc or cadmium as the next major constituent

Definitions

  • the present invention relates to an inexpensive magnesium thin sheet for spreading excellent in formability, particularly, press formability in a cold state, and a method for producing the same.
  • wrought magnesium alloy sheets have been made into thin sheets by repeatedly heat-treating, hot-rolling, warm-rolling, and cold-rolling forged slabs with a thickness of several mm to several tens of mm or thick plates by extrusion.
  • Thin Mg alloy sheets manufactured by such repeated heat treatment, hot rolling, warm rolling, etc. have poor workability at temperatures between room temperature and below the warm range, that is, cold workability and economical efficiency. In terms of cost, it has become widely used.
  • Japanese Unexamined Patent Application Publication No. Hei 6-2939394 Japanese Unexamined Patent Publication No. Hei 6-257888, Japanese Unexamined Patent Publication No. Hei 9-41066, and the like are available.
  • Japanese Patent Application Laid-Open No. 6-293394 describes a composition and a rolling condition for improving press formability at 200 ° C. in a warm state.
  • Hei 6-25778 / 88 discloses a technique in which lithium is added to magnesium, and one phase of the bcc structure is added to one phase of the hcp structure.
  • ductility and bending workability in the cold are improved, but since lithium is an active metal, there is only a safety problem in handling large quantities industrially. Instead, it is expensive and significantly reduces the corrosion resistance of magnesium.
  • proposals for hot working of magnesium For example, Japanese Patent Application Laid-Open Nos. 5-293529, 6-81089, 2000-271693, 2001-252703, etc. However, the purpose is to efficiently perform hot processing and not to improve formability.
  • 2000-271693 discusses processing methods and conditions for imparting large strain for the purpose of refining crystal grains, and the crystal grain size is refined to 1 ⁇ m or less. No improvement is mentioned. Also, the shape is limited or hot forging must be repeated, and thin magnesium alloy sheets cannot be produced.
  • An object of the present invention is to provide a wrought magnesium sheet and a method for producing the same. Disclosure of the invention
  • the present inventors have conducted intensive studies and as a result, have found that the following magnesium alloy has excellent workability, and have completed the present invention.
  • the magnesium sheet for stretching according to the present invention according to claim 1 contains 1 to 3.8% by weight of A1, 211 to 6% by weight of 211, 0.1 to 2% by weight of Mn, and the balance of Mg Extruded Mg alloy sheet consisting of unavoidable impurities is rolled, the thickness after rolling is 0.2 to 2 mm, the yield strength in the direction parallel to the rolling direction is Y1, the tensile strength is Tl, and the rolling method is When the yield strength in the direction perpendicular to the direction is ⁇ 2 and the tensile strength is ⁇ 2, T1 and ⁇ 2 are 200 to 35 OMPa, and at least the (Y1ZT1) value or the ( ⁇ 2 / ⁇ 2) value One value is 0.7 or less and the average grain size is 3 to 100 ⁇ m. It is characterized by that.
  • the magnesium thin sheet for spreading according to the second aspect of the present invention is preferably subjected to a heat treatment in a temperature range of 150 to 400 ° C. after rolling the Mg alloy.
  • the Mg alloy preferably further contains one or more of Zr, Y, Ag, Si and Ca.
  • the method for producing a wrought magnesium sheet according to the present invention according to claim 4 is characterized in that A1 contains 1 to 3.8% by weight, ⁇ 11 1 to 6% by weight, and Mn 0.1 to 2% by weight.
  • An extruded Mg alloy sheet consisting of Mg and unavoidable impurities is rolled, the thickness after rolling is 0.2 to 2 mm, the yield strength in the direction parallel to the rolling direction is Y1, and the tensile strength is T1, when the yield strength in the direction perpendicular to the rolling direction is Y2 and the tensile strength is T2, T1 and T2 are 200 to 35 OMPa, and the (Y1ZT1) value or ( ⁇ 2 / ⁇ 2) At least one of the values is 0.7 or less, and the average crystal grain size is 3 to 100 ⁇ .
  • the above-mentioned wrought magnesium sheet contains 1 to 3.8% by weight of A1, 1 to 6% by weight of Zn, and 0.1 to 2% by weight of Mn, and the remainder consists of Mg and inevitable impurities. ⁇ It can be obtained by directly extruding a molded billet to produce a plate while imparting large strain while suppressing edge cracks and breakage.
  • concentration range for each component is as follows.
  • a 1 As the amount of A 1 increases, the more it is added, the more the effect of improving corrosion resistance, strength, and formability is improved. It is necessary to add 1% by weight or more. 3. If it exceeds 8% by weight, it becomes difficult to form a solution of the crystallized substance, and it is liable to become brittle.
  • Mn content has the effect of improving corrosion resistance, and is 0.1 weight. It is necessary to add / 0 or more. If it exceeds 2% by weight, the crystallized substance cannot be dissolved and becomes brittle.
  • the Zr content is an effective component for refining crystal grains, and the effect is saturated by adding 2% by weight.
  • Y content is an effective component for improving the strength, and becomes brittle if it exceeds 8% by weight.
  • Extrude a billet of the Mg alloy having the above composition.
  • the extrusion conditions are as follows: Extrusion temperature range is 350 to 450 ° C, Extrusion speed is 1 to: L 00 mZ, Extrusion ratio is 50 or more, preferably 100 or more, and thickness is 0.5 to 2.5 mm. The range is desirable.
  • the magnesium alloy thus extruded is subjected to cold or warm rolling so that the sheet thickness after rolling falls within the range of 0.2 to 2 mm.
  • the rolling ratio is preferably in the range of 0.5 to 30%.
  • the temperature is preferably in the range of 200 to 300 ° C and the range of 0.5 to 40%. If it is less than 0.5%, surface flaws during extrusion cannot be eliminated, and if it exceeds the upper limit (30% in cold rolling and 40% in warm rolling), the workability deteriorates.
  • application of different peripheral speed rolling with different peripheral speeds of the upper and lower rolls is also desirable from the viewpoint of workability.
  • the rolling ratio in that case may be in the same range as the constant speed rolling range.
  • Warm rolling is performed at 200 to 350 ° C at an appropriate temperature depending on the composition. It should be set.
  • the tensile strength after rolling is in the range of 200 to 35 OMPa in the direction parallel to and perpendicular to the rolling direction, and the yield strength in the direction parallel to the rolling direction is Yl, and the tensile strength is Tl.
  • the yield strength in the direction perpendicular to the rolling direction is ⁇ 2 and the tensile strength is ⁇ 2
  • the average grain size is 3 to 100 ⁇ m.
  • the average crystal grain size is less than 3 ⁇ m, it is economically difficult to manufacture, and if it exceeds 100 m, workability is poor.
  • M g- 3 wt 0/0 A 1 performs an 1 weight 0/0 Z n _ 1 wt 0 / oM n Temperature 400 ° C a billet having a composition of, extruded at an extrusion rate of 5 m / min condition, the plate The thickness was 0.52 mm. Furthermore, a 0.5 mm-thick magnesium alloy sheet for drawing was obtained by cold rolling.
  • Table 1 shows the evaluation results.
  • the evaluation method is as shown below.
  • the overhang height was determined by elongating a magnesium alloy sheet using an Erichsen tester and determining the maximum overhang height before breaking.
  • X-ray intensity was measured at a voltage of 50 kV and a current of 19 OmA using Cu as the tube, and the X-ray intensity ratio [X-ray intensity of the (0002) plane] / [(101 (upper bar) 0 ) Surface X-ray intensity].
  • Table 1 shows the evaluation results.
  • the wrought magnesium alloy sheet of the present invention is superior in stretchability to the conventional magnesium alloy sheet (manufacturing process: slab extrusion ⁇ warm rolling ⁇ heat treatment ⁇ cold rolling). ing. This is because in the conventional method, the reduction rate of the thickness due to rolling is high, so that a rolled texture with a high ratio of the bottom surface parallel to the sheet surface is achieved, but the extrusion degree is increased and the rolling conditions and rolling degree are reduced. As a result, it is possible to obtain a set ⁇ having a small bottom plate surface ratio parallel to the plate surface.
  • the wrought magnesium alloy sheet of the present invention and the method for producing the same are particularly excellent in stretchability compared to conventional materials produced through the steps of extrusion, warm rolling, heat treatment and cold rolling of a slap. It is.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Metal Rolling (AREA)

Abstract

L'invention concerne une feuille de magnésium mince et malléable. Cette feuille se caractérise en ce qu'elle est produite par laminage d'une feuille d'un alliage de magnésium extrudée comprenant 1 à 3,8% en poids d'Al, 1 à 6 % en poids de Zn, 0,1 à 2 % en poids de Mn et la quantité équilibrée de Mg et les impuretés inévitables. Après laminage, cette feuille présente une épaisseur de 0,2 à 2 mm, et T1 et T2 de 200 à 350 Mpa et possède au moins une valeur (Y1/T1) et une valeur (Y2/T2) inférieure ou égale à 0,7, où Y1 et T1 représentent, respectivement, la limite d'élasticité et la résistance à la traction, respectivement, dans le sens parallèle au sens de laminage. Y2 et T2 représentent, respectivement, la limite d'élasticité et la résistance à la traction, respectivement, dans le sens perpendiculaire au sens de laminage et présentent un diamètre de grain de cristal moyen compris entre 3 et 100 νm. L'invention traite également d'un procédé de production d'une feuille de magnésium mince malléable. Cette feuille de magnésium présente une excellente aptitude au façonnage , en particulier, en matière de façonnage à la presse.
PCT/JP2003/005627 2002-05-10 2003-05-02 Feuille de magnesium mince malleable presentant une excellente aptitude au façonnage et procede de production de cette derniere WO2003095691A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003231403A AU2003231403A1 (en) 2002-05-10 2003-05-02 Malleable thin magnesium sheet excellent in workability and method for production thereof

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2002-135280 2002-05-10
JP2002135280A JP4064720B2 (ja) 2002-05-10 2002-05-10 成形性に優れる展伸用マグネシウム薄板およびその製造方法

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WO2003095691A1 true WO2003095691A1 (fr) 2003-11-20

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JP (1) JP4064720B2 (fr)
AU (1) AU2003231403A1 (fr)
WO (1) WO2003095691A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3558628B2 (ja) 2002-06-05 2004-08-25 住友電工スチールワイヤー株式会社 マグネシウム合金板およびその製造方法
JP2004115862A (ja) * 2002-09-26 2004-04-15 Toyo Kohan Co Ltd 成形性に優れた展伸用マグネシウム薄板およびその製造方法
KR100605741B1 (ko) * 2004-04-06 2006-08-01 김강형 내식성과 도금성이 우수한 마그네슘합금 단련재
JP4780600B2 (ja) * 2004-11-17 2011-09-28 三菱アルミニウム株式会社 深絞り性に優れたマグネシウム合金板およびその製造方法
JP4780601B2 (ja) * 2004-11-18 2011-09-28 三菱アルミニウム株式会社 プレス成形性に優れたマグネシウム合金板およびその製造方法
JP4852754B2 (ja) * 2006-09-15 2012-01-11 国立大学法人富山大学 展伸用マグネシウム合金、同合金より成るプレス成形用板材およびその製造方法
JP2010047777A (ja) * 2007-05-09 2010-03-04 National Institute For Materials Science Ｍｇ基合金
CN102632100A (zh) * 2012-04-25 2012-08-15 中南大学 一种高延展性镁合金板带的加工方法
JP6560193B2 (ja) * 2014-03-28 2019-08-14 古河電気工業株式会社 マグネシウム合金管材とその製造方法、及びそれを用いてなるステントとその製造方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63282232A (ja) * 1987-05-15 1988-11-18 Showa Denko Kk 塑性加工用高強度マグネシウム合金とその製法
JP2001300643A (ja) * 2000-04-21 2001-10-30 Mitsui Mining & Smelting Co Ltd マグネシウム材製品の製造方法

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63282232A (ja) * 1987-05-15 1988-11-18 Showa Denko Kk 塑性加工用高強度マグネシウム合金とその製法
JP2001300643A (ja) * 2000-04-21 2001-10-30 Mitsui Mining & Smelting Co Ltd マグネシウム材製品の製造方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
KANEKO ET AL.: "Magnesium gokin tenshinzai no kikai-teki seishitsu to seikei-sei ni oyobosu shugo soshiki no eikyo", NIHON KINZOKU GAKKAIHI, vol. 64, no. 2, 2000, pages 141 - 147, XP002975479 *

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JP4064720B2 (ja) 2008-03-19
AU2003231403A1 (en) 2003-11-11
JP2003328063A (ja) 2003-11-19

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