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WO2018159890A1 - Alliage zinc-aluminium à grains orientés et son procédé de fabrication - Google Patents

Alliage zinc-aluminium à grains orientés et son procédé de fabrication Download PDF

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Publication number
WO2018159890A1
WO2018159890A1 PCT/KR2017/003019 KR2017003019W WO2018159890A1 WO 2018159890 A1 WO2018159890 A1 WO 2018159890A1 KR 2017003019 W KR2017003019 W KR 2017003019W WO 2018159890 A1 WO2018159890 A1 WO 2018159890A1
Authority
WO
WIPO (PCT)
Prior art keywords
zinc
aluminum alloy
alloy
aluminum
unidirectional
Prior art date
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.)
Ceased
Application number
PCT/KR2017/003019
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English (en)
Korean (ko)
Inventor
한승전
정해창
안지혁
이재현
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Changwon National University
Original Assignee
Changwon National University
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 Changwon National University filed Critical Changwon National University
Priority to CN201780009499.4A priority Critical patent/CN108779516A/zh
Publication of WO2018159890A1 publication Critical patent/WO2018159890A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C18/00—Alloys based on zinc
    • C22C18/04—Alloys based on zinc 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
    • C22C1/00—Making non-ferrous alloys
    • C22C1/02—Making non-ferrous alloys by melting

Definitions

  • the present invention relates to a zinc-aluminum alloy and a method for manufacturing the same, and more particularly, to a zinc-zinc aluminum alloy having a directional crystal grain by unidirectional solidification to continuous casting method and a method for producing the same.
  • Zinc-aluminum alloy is a low-cost, low-melting die-cast alloy, and is mainly used as a compact structural material in the electronics industry, transportation industry and construction industry. However, its use is limited because it is relatively low in strength and brittle fracture easily occurs compared to other structural materials.
  • an object of the present invention is to provide a zinc-aluminum alloy in which mechanical properties such as hardness, tensile strength, and ductility are improved by having the grains directional through unidirectional solidification or continuous casting, and a method of manufacturing the same. .
  • the zinc-aluminum alloy which concerns on this invention for achieving the said subject is characterized by having a directional crystal grain.
  • the average aspect ratio of the said crystal grain is 3-12.
  • the zinc-aluminum alloy according to the present invention preferably contains 3 to 5 wt% aluminum and 2 to 5 wt% copper based on the total weight.
  • Zinc-aluminum alloy according to the present invention has the characteristics of hardness 60 ⁇ 150 Hv, tensile strength 240 ⁇ 400 MPa, elongation 5 ⁇ 45%.
  • the zinc-aluminum alloy according to the present invention is characterized in that the aromatic grains are obtained by unidirectional solidification or continuous casting.
  • the one-way solidification is preferably made of a one-way growth rate of 1 ⁇ 500 ⁇ m / sec in the molten 450 ⁇ 700 °C.
  • the zinc-aluminum alloy according to the present invention may be further processed into a plate, a wire, or a bar after solidifying into a rod shape by the unidirectional solidification.
  • Zinc-aluminum alloy manufacturing method for achieving the above object
  • the molten metal is preferably placed under an inert gas atmosphere.
  • the grains and precipitates are directional by unidirectional solidification or continuous casting, thereby improving mechanical properties such as hardness, tensile strength, and elongation.
  • the addition of copper makes this effect even better.
  • the tensile strength and elongation are further improved when the zinc-aluminum alloy having directional grains is further processed according to the present invention, compared to the case in which the general cast zinc-aluminum alloy is additionally processed into various forms such as wire, plate, and bar. do.
  • FIG. 1 is a view for explaining the one-way solidification equipment 1 used for one-way solidification of the present invention
  • FIG. 3 is a microstructure photograph of a unidirectional solidified zinc-aluminum alloy according to the present invention.
  • Figure 4 is a graph of the mechanical properties of the case of further processing the unidirectional solidified rod-shaped zinc-aluminum alloy.
  • alumina tube 30 alumina pipe
  • heating element 50 cooling part
  • Zinc-aluminum alloys 1 to 7 are weighed according to the composition, and cast by 3 kg using a high frequency induction melting furnace. The ingot is then processed into rods 100 mm long and 4.7 mm in diameter. Component contents of the zinc-aluminum alloys 1 to 7 are shown in Table 1 below.
  • One-way solidification equipment 1 is installed so that the furnace 10 can be moved up and down by the shanghai conveying apparatus (90).
  • An alumina pipe 30 is installed in the center portion of the furnace 10, and a heat generator 40 is installed around the outer side of the alumina pipe 30 so as to heat the alumina pipe 30.
  • the lower part of the alumina pipe 30 is provided with a cooling unit 50 through which the cooling water 51 flows.
  • the alumina tube 20 is fitted in the alumina pipe 30.
  • the alumina tube 20 has an outer diameter of 8 mm, an inner diameter of 5 mm, and a length of 700 mm, and a hem is blocked.
  • the gas injection unit 80 is installed at the upper end of the alumina tube 20 so that the inside of the alumina tube 20 can be maintained in an inert gas atmosphere such as argon (Ar).
  • a support bar 60 is installed at the bottom of the alumina tube 20.
  • the one-way coagulation process is described as follows.
  • the bottom end of the alumina tube 20 is sealed and the support bar 60 is charged to the bottom side of the alumina tube 20.
  • the bar material (zinc-aluminum master alloy) manufactured through the general casting as described above is alumina tube. It charges in (20).
  • the alumina tube 20 is fixed to the gas inlet 80, the alumina tube 20 thus fixed is charged into the alumina pipe 30 inside the furnace 10.
  • the alumina tube 20 is heated through the heating element 40 to re-dissolve the bar (zinc-aluminum master alloy) to form the molten metal 70, and then, while the alumina tube 20 is still, the Shanghai conveying apparatus The furnace 10 is moved upward in one direction through the 90. In this process, the unidirectional solidification zinc-aluminum alloy 100 is obtained by unidirectional solidification in this process.
  • the inside of the alumina tube 20 is preferably in an inert gas atmosphere, and in order to make the average aspect ratio of the crystal grains about 3-12, the molten metal 70 having a temperature of 450 to 700 ° C. It is desirable to achieve one-way solidification at a speed of 1 ⁇ 500 ⁇ m / sec.
  • the one-way solidified zinc-aluminum alloy 100 was grown to 60 mm at the initial position, and then cooled by water to obtain a rod shape.
  • Table 2 below shows the hardness measurement results for the zinc-aluminum alloy prepared by general casting and the unidirectional solidified zinc-aluminum alloy 100 according to the present invention. Hardness measurement was performed under the conditions of 100 gf load and 10 seconds load application time.
  • Table 3 shows the tensile strength measurement results for the zinc-aluminum alloy prepared by the general casting and the unidirectional solidified zinc-aluminum alloy 100 according to the present invention.
  • Table 4 shows the elongation measurement results for the zinc-aluminum alloy prepared by general casting and the unidirectional solidified zinc-aluminum alloy 100 according to the present invention. Evaluation of tensile properties, such as tensile strength and elongation, was made under conditions of a tensile rate of 2 mm / min.
  • the tensile properties of Table 3 and Table 4 show that the tensile strength and elongation of Alloy 3 are better than that of Alloy 1.
  • the grain boundary of the zinc-aluminum substrate is increased.
  • a fine particle ⁇ phase composed of a Zn-Cu solid solution is precipitated, thereby improving tensile strength and elongation characteristics.
  • FIG. 2 is a microstructure photograph of a zinc-aluminum alloy prepared by general casting
  • FIG. 3 is a microstructure photograph of a unidirectional solidified zinc-aluminum alloy 100 according to the present invention.
  • Table 5 summarizes the average grain aspect ratios measured based on these images. At this time, the size of the analyzed image was 1150 ⁇ m in width and 850 ⁇ m in length.
  • the grain aspect ratio after one-way solidification is at least 3.65, which is higher than that of the general casting.
  • unidirectional solidification is a method of solidifying the material continuously, the solidified tissue becomes directional when the flow of heat proceeds from the liquid phase to the solid phase.
  • grains and precipitates of the alloy are arranged in one direction as described above, so that tensile strength and elongation characteristics are improved.
  • Continuous casting also has the direction of organization in the same principle as one-way solidification, so one-way solidification and continuous casting are the same context.
  • the zinc-aluminum alloy 100 solidified in one direction in the rod shape may be reprocessed in various forms such as wire, plate, and bar through additional processing.
  • Table 6 is a result of measuring the mechanical properties when the general casting and unidirectional solidified rod-shaped alloy 3 drawing 30%, 50%, 80%, Figure 4 is a graph illustrating this.
  • the grains and precipitates are directional by unidirectional solidification or continuous casting, thereby improving mechanical properties such as hardness, tensile strength, and elongation.
  • the addition of copper makes this effect even better.
  • the tensile strength and elongation are further improved when the zinc-aluminum alloy having directional grains is further processed according to the present invention, compared to the case in which the general cast zinc-aluminum alloy is additionally processed into various forms such as wire, plate, and bar. do.

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

Abstract

L'invention concerne un alliage zinc-aluminium fabriqué par un procédé comprenant les étapes consistant : à obtenir un alliage mère zinc-aluminium par coulée ; et à refondre de l'alliage mère de zinc-aluminium et à solidifier unidirectionnellement l'alliage mère refondu à un taux de croissance unidirectionnel de 1 à 500 µm/sec dans un métal fondu à 450 à 700 °C pour faire croître l'alliage mère de telle sorte que sa texture ait une orientation, les grains de l'alliage zinc-aluminium ayant un rapport d'aspect moyen de 3 à 12. Selon la présente invention, les grains et les précipités obtiennent une orientation par solidification unidirectionnelle ou coulée continue, et des propriétés mécaniques telles que la dureté, la résistance à la traction et l'allongement sont ainsi améliorées. En outre, l'ajout de cuivre rend un tel effet supérieur. En particulier, il existe une grande importance en ce que la résistance à la traction et la ductilité qui ont des propriétés opposées l'une à l'autre et sont ainsi à peine améliorées en même temps sont améliorées ensemble.
PCT/KR2017/003019 2017-02-28 2017-03-21 Alliage zinc-aluminium à grains orientés et son procédé de fabrication Ceased WO2018159890A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201780009499.4A CN108779516A (zh) 2017-02-28 2017-03-21 具有方向性晶粒的锌-铝合金及其制备方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020170025824A KR101910868B1 (ko) 2017-02-28 2017-02-28 방향성 결정립을 갖는 아연-알루미늄 합금 및 그 제조방법
KR10-2017-0025824 2017-02-28

Publications (1)

Publication Number Publication Date
WO2018159890A1 true WO2018159890A1 (fr) 2018-09-07

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CN (1) CN108779516A (fr)
WO (1) WO2018159890A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111536796B (zh) * 2020-06-15 2021-09-14 贵州省鑫泰增材制造有限公司 一种锌合金的熔炼设备及其生产工艺

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01294837A (ja) * 1988-05-21 1989-11-28 Toho Aen Kk 高強度亜鉛合金
JPH1161300A (ja) * 1997-08-25 1999-03-05 Mitsui Mining & Smelting Co Ltd 金型用亜鉛基合金、金型用亜鉛基合金ブロック及びそれらの製造方法
JPH11279673A (ja) * 1998-03-30 1999-10-12 Mitsui Mining & Smelting Co Ltd 金型用亜鉛合金、金型及び金型用ブロック
US20110014084A1 (en) * 2009-07-20 2011-01-20 Eastern Alloys, Inc. High strength, creep resistant zinc alloy
KR20120098999A (ko) * 2009-10-30 2012-09-06 신토고교 가부시키가이샤 아연계 합금 쇼트

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4990310A (en) * 1989-09-11 1991-02-05 General Motors Corporation Creep-resistant die cast zinc alloys
FR2700343B1 (fr) * 1993-01-14 1995-03-17 France Sa Union Miniere Procédé de fabrication d'articles en alliage Zn-Al-Cu par coulée centrifuge ou coulée sous pression.
KR100961081B1 (ko) 2009-03-03 2010-06-08 임현규 고강도 경량 아연-알루미늄 합금
CN104498773B (zh) * 2014-12-19 2017-03-22 宁波博威合金材料股份有限公司 一种变形锌基合金材料及其制备方法和应用

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01294837A (ja) * 1988-05-21 1989-11-28 Toho Aen Kk 高強度亜鉛合金
JPH1161300A (ja) * 1997-08-25 1999-03-05 Mitsui Mining & Smelting Co Ltd 金型用亜鉛基合金、金型用亜鉛基合金ブロック及びそれらの製造方法
JPH11279673A (ja) * 1998-03-30 1999-10-12 Mitsui Mining & Smelting Co Ltd 金型用亜鉛合金、金型及び金型用ブロック
US20110014084A1 (en) * 2009-07-20 2011-01-20 Eastern Alloys, Inc. High strength, creep resistant zinc alloy
KR20120098999A (ko) * 2009-10-30 2012-09-06 신토고교 가부시키가이샤 아연계 합금 쇼트

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Publication number Publication date
KR20180098965A (ko) 2018-09-05
CN108779516A (zh) 2018-11-09
KR101910868B1 (ko) 2018-10-23

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