EP2172572A1 - Baustoffteil aus si-reicher mg-haltiger al-legierung und herstellungsverfahren dafür - Google Patents

Baustoffteil aus si-reicher mg-haltiger al-legierung und herstellungsverfahren dafür Download PDF

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Publication number
EP2172572A1
EP2172572A1 EP08772999A EP08772999A EP2172572A1 EP 2172572 A1 EP2172572 A1 EP 2172572A1 EP 08772999 A EP08772999 A EP 08772999A EP 08772999 A EP08772999 A EP 08772999A EP 2172572 A1 EP2172572 A1 EP 2172572A1
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EP
European Patent Office
Prior art keywords
thermal
casting
ingot
plastic processing
aluminum alloys
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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.)
Granted
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EP08772999A
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English (en)
French (fr)
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EP2172572B1 (de
EP2172572A4 (de
Inventor
Liang Zuo
Fuxiao Yu
Gang Zhao
Xiang Zhao
Yongliang Yang
Yan Li
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Northeastern University China
Northeastern University Boston
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Northeastern University China
Northeastern University Boston
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Publication of EP2172572A4 publication Critical patent/EP2172572A4/de
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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
    • 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
    • C22F1/043—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 silicon as the next major constituent

Definitions

  • the present invention relates to aluminum alloys and their method of preparation, and more particularly to magnesium-contained high-silicon aluminum alloys for use as structural materials, and the manufacture method thereof.
  • Al-silicon alloys especially those with high silicon content, are widely used in car and aviation industries, due to their low density, high wear resistance, high anti-corrosiveness, and low thermal expansion coefficient. With the common solidification method for preparation of Al-Si alloys, there usually appear large silicon particles and eutectic plates, resulting in a dramatically increased brittleness of the alloys. Thus, it is difficult to improve the solidified microstructure and to obtain various shaped high-performance structural materials through subsequent plastic deformation, which poses a bottleneck for more general applications of these alloys. Traditionally, Al-Si alloys are categorized into the casting aluminum alloy series.
  • the above method can be incorporated with thermoplastic processing and subsequent heat treatment, so as to produce Mg-containing high-silicon aluminum alloys with relatively high plasticity and strength, including profiles, bars, sheets, and forgings, for use as advanced new structural materials.
  • An object of the present invention is to provide high-silicon aluminum alloys (Al-Si alloys) that contain magnesium (Mg) and have good plasticity and high strength for use as structural materials, and the manufacture method thereof. Without adding any modifiers, the Al-Si alloys are manufactured at low cost with the direct chill casting followed by the thermoplastic process and heat treatment.
  • Al-Si alloys that contain magnesium (Mg) and have good plasticity and high strength for use as structural materials, and the manufacture method thereof. Without adding any modifiers, the Al-Si alloys are manufactured at low cost with the direct chill casting followed by the thermoplastic process and heat treatment.
  • the present invention presents the aluminum alloys containing Mg and high Si, which comprises profiles, bars, sheets, and forgings, wherein the aluminum alloys are made by a process comprising the steps of:
  • the Mg-contained high-silicon aluminum alloys for use as structural materials contain 0.2 ⁇ 2.0wt% of Mg and 8 ⁇ 18wt% of Si, wherein they have an evenly refined microstructure: the aluminum matrix is fine equiaxed with an average grain size less than 6 ⁇ m, and the silicon and second phase particles are dispersed with an average size less than 5 ⁇ m.
  • the Mg-contained high-silicon aluminum alloys may contain at least one of Cu, Zn, Ni, Ti, and Fe elements, wherein a total weight percentage of the Cu, Zn, Ni, Ti, and Fe is less than 2wt%.
  • the step (a) of direct chill casting is subjected to the cast ingot preparation for a given Al-Si alloy, at a relative casting temperature of 150 ⁇ 30(1°C above the liquidus line, a casting speed of 100 ⁇ 200mm/min, and a cooling water flux of 5 ⁇ 15g/mm ⁇ s on the periphery of the solidified ingot, wherein no modifier is added to the alloy.
  • the step (b) of preheat-treating is subjected to the formation of dispersed eutectic Si phase particles in the ingot, at a heating rate of 10 ⁇ 30°C/min, a heating temperature of 450 ⁇ 520°C, and a holding time of 1 ⁇ 3 hours.
  • the preheat-treated ingot is subjected to a thermal-plastic processing in the step (c), at a hot-deformation temperature of 400 ⁇ 520°C, followed by cooling naturally or forcedly.
  • the hot-deformed product is then heat-treated after the thermal-plastic processing.
  • the heat treatment in the step (c) further comprises a step of solution treatment and a step of artificial aging process.
  • the solution treatment is performed at a heating rate of 10 ⁇ 30°C/min, a solution treatment temperature of 500 ⁇ 540°C, and a solution treatment time of 0.5 ⁇ 3 hours, followed by quenching.
  • the artificial aging process is performed at an aging temperature of 160 ⁇ 200°C, and an aging time of 1 ⁇ 10 hours.
  • the heat treatment in the step (c) further comprises a step of artificial or natural aging treatment, wherein the artificial treatment is performed at an aging temperature of 160 ⁇ 200°C, and an aging time of 1 ⁇ 10 hours.
  • a hot rolling process is adapted in the step of thermal-plastic processing, wherein the ingot is hot deformed at a total rolling reduction of more than 40%.
  • a hot extrusion process is adapted in the step of thermal-plastic processing, wherein the ingot is hot deformed at an extrusion ratio of more than 15.
  • a hot forging process is adapted in the step of thermal-plastic processing, wherein the ingot is hot deformed at a forging ratio of more than 40%.
  • the present invention overcomes the cognition prejudice traditionally imposed on Al-Si alloys. Without adding any modifiers, an unexpected effect has been reached on the magnesium-contained high-silicon aluminum alloys prepared by incorporating conventional direct chill casting method with thermal-plastic process and heat treatment. They are typically of fine-dispersed silicon particles and second phase at equiaxed Al matrix, associated with a relatively high strength and good plasticity for potential use as structural materials
  • Fig. 14 gives a comparison of mechanical properties between the Al-Si extrusion alloys of the present invention and the China National Standard extrusion alloy 6063 at the T5 and T6 states, wherein the alloys of the present invention are AI-8.5Si-1.8Mg-0.27Fe, Al-12.7Si-0.7Mg-1.5Cu-0.3Ni-0.3Ti-0.3Fe, and Al-15.5Si-0.7Mg-0.27Fe, respectively.
  • the yield strength and tensile strength of the Al-8.5Si-1.8Mg-0.27Fe, Al-12.7Si-0.7Mg-1.5Cu-0.3Ni-0.3Ti-0.3Fe, and Al-15.5Si-0.7Mg-0.27Fe extrusion alloys at the T6 state are higher than the China National Standards for the extrusion alloy 6063 at the T6 state.
  • the mechanical properties of these alloys at the extrusion state (T1), especially the elongation rate, are also higher than the China National Standards for the 6063 alloys at the T5 state.
  • the 6063 alloys As the most common aluminum extrusion alloys, the 6063 alloys have been widely used in architectures, vehicles, and decorations etc., which have great need in the existing market. Once the 6063 alloys are partially replaced by the magnesium-contained high-silicon aluminum alloys of the present invention, it will bring great economic benefits. In addition, the use of an increased amount of Si in the alloys can dramatically conserve the aluminum resource.
  • a step of casting ingot via the direct chill casting method according to a first preferred embodiment of the present invention is illustrated.
  • a device designed for the direct chill casting process is shown in Fig. 1 of the drawings, wherein the device comprises a cooling water inlet 1, a crystallizer 2, a hot top 4, and a graphite ring 5, wherein a raw material 3 of the ingot and a liquid metal 6 are separately received within a container of the device.
  • a plurality of compositions of an alloy made from the ingot via the casting process is shown in Fig. 15 .
  • a plurality of parameters of the casting process is shown in Fig. 16 .
  • a step of preheating, followed by hot extruding, or hot rolling, or hot forging the ingot according to a second preferred embodiment of the present invention is illustrated.
  • the ingot is heated in an oven at a predetermined heating rate. After the predetermined temperature is reached, the ingot is held for a predetermined time. Then, a hot extrusion device, or a hot rolling device, or a hot forging device is used to complete a thermal-plastic processing.
  • a plurality of parameters of the preheating and hot extruding for each of the alloys is shown in Fig. 17 .
  • a plurality of parameters of the preheating and hot rolling for each of the alloys is shown in Fig. 18 .
  • a plurality of parameters of the preheating and hot forging for each of the alloys is shown in Fig. 19 .
  • a step of heat treatment after hot deformation of the alloys such as hot extrusion, hot rolling, and hot forging, according to a third preferred embodiment of the present invention is illustrated.
  • the heat treatment is applied to the product at a predetermined temperature.
  • a plurality of parameters of the hot extrusion, hot rolling, and hot forging processes are shown in Figs. 20, 21 , and 22 respectively.
  • a plurality of mechanical properties of the alloys after the heat treatments is shown in Fig. 23 .
  • the present invention provides the industrial use of the Mg-contained high silicon aluminum alloys (Al-Si alloy), and the manufacture method thereof. Without adding any modifiers, the Al-Si alloys having good plasticity and relatively high strength are manufactured at low cost with the direct chill casting followed by the thermal-plastic process and heat treatment, for use as structural materials.

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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)
  • Forging (AREA)
  • Continuous Casting (AREA)
  • Extrusion Of Metal (AREA)
EP08772999.2A 2007-06-29 2008-06-30 Baustoffteil aus si-reicher mg-haltiger al-legierung und herstellungsverfahren dafür Not-in-force EP2172572B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN200710011919 2007-06-29
PCT/CN2008/001246 WO2009003365A1 (fr) 2007-06-29 2008-06-30 Pièce de matériau de structure en alliage d'al contenant mg et à forte teneur en si et procédé de fabrication de celle-ci

Publications (3)

Publication Number Publication Date
EP2172572A1 true EP2172572A1 (de) 2010-04-07
EP2172572A4 EP2172572A4 (de) 2010-12-15
EP2172572B1 EP2172572B1 (de) 2013-05-15

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EP08772999.2A Not-in-force EP2172572B1 (de) 2007-06-29 2008-06-30 Baustoffteil aus si-reicher mg-haltiger al-legierung und herstellungsverfahren dafür

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Country Link
US (1) US20100126639A1 (de)
EP (1) EP2172572B1 (de)
JP (1) JP2010531388A (de)
KR (1) KR20100018048A (de)
CN (1) CN101333614B (de)
CA (1) CA2689332A1 (de)
RU (1) RU2463371C2 (de)
WO (1) WO2009003365A1 (de)

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CN102230114A (zh) * 2011-06-29 2011-11-02 北京科技大学 基于富Fe相优化的高硅铝合金及其制备方法
CN102747256A (zh) * 2012-06-19 2012-10-24 东南大学 一种铝硅基铝型材及其制备工艺
RU2525872C1 (ru) * 2013-04-23 2014-08-20 Федеральное Государственное Автономное Образовательное Учреждение Высшего Профессионального Образования "Сибирский Федеральный Университет" СПОСОБ ФОРМИРОВАНИЯ МИКРОСТРУКТУРЫ ЭВТЕКТИЧЕСКОГО Al-Si СПЛАВА
CN103769551B (zh) * 2014-01-17 2016-03-30 新疆众和股份有限公司 一种铝硅镁系铸造铝合金的生产工艺
WO2015152133A1 (ja) 2014-03-31 2015-10-08 日立金属株式会社 比剛性、強度及び延性に優れた鋳造用Ａｌ－Ｓｉ－Ｍｇ系アルミニウム合金、並びにそれからなる鋳造部材
CN104651763A (zh) * 2014-05-15 2015-05-27 巩向鹏 一种6063铝合金的性能优化方法
CN104087880B (zh) * 2014-07-08 2016-05-04 江苏佳铝实业股份有限公司 一种高阻尼铝硅合金板材的生产工艺
KR101990225B1 (ko) * 2014-12-05 2019-06-17 후루카와 덴키 고교 가부시키가이샤 알루미늄 합금 선재, 알루미늄 합금연선, 피복전선, 와이어 하네스, 및 알루미늄 합금 선재의 제조방법
JP6523681B2 (ja) * 2014-12-25 2019-06-05 株式会社Uacj ケース用アルミニウム合金板及びケース
CN105112744A (zh) * 2015-10-08 2015-12-02 江苏佳铝实业股份有限公司 一种高硅铝合金板材的制造工艺
TWI565808B (zh) * 2015-10-13 2017-01-11 財團法人工業技術研究院 鋁合金組成物及鋁合金物件的製造方法
FR3044326B1 (fr) * 2015-12-01 2017-12-01 Constellium Neuf-Brisach Tole mince a haute rigidite pour carrosserie automobile
CN105695811A (zh) * 2015-12-15 2016-06-22 东北大学 一种含Ti可时效强化高硅铝合金及其变形材制备方法
CN105695810B (zh) * 2015-12-15 2017-12-05 东北大学 一种含Mn可时效强化高硅铝合金及其变形材制备方法
CN106929781B (zh) * 2015-12-29 2019-01-08 徐工集团工程机械股份有限公司 一种高强度铝合金销轴的制备方法
CN106544606B (zh) * 2015-12-29 2018-05-01 徐工集团工程机械股份有限公司 一种耐磨铝合金销轴的制备方法
CN105671376B (zh) * 2016-01-26 2017-04-26 北京航空航天大学 高强高塑重力铸造与室温冷轧亚共晶铝硅合金材料及其制造方法
CN106399765B (zh) * 2016-10-11 2019-02-26 湖南理工学院 Al-Si-Mg铝合金及其制备工艺
WO2019125594A1 (en) * 2017-12-21 2019-06-27 Novelis Inc. Aluminum alloy products exhibiting improved bond durability and/or having phosphorus-containing surfaces and methods of making the same
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CN113862534B (zh) * 2021-10-08 2022-07-29 上海交通大学 一种铝合金材料组织遗传性的调控方法及7085铝合金厚板的制备方法
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See also references of WO2009003365A1 *

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Publication number Publication date
RU2009149092A (ru) 2011-08-10
RU2463371C2 (ru) 2012-10-10
EP2172572B1 (de) 2013-05-15
CN101333614A (zh) 2008-12-31
EP2172572A4 (de) 2010-12-15
KR20100018048A (ko) 2010-02-16
US20100126639A1 (en) 2010-05-27
CN101333614B (zh) 2010-09-01
WO2009003365A1 (fr) 2009-01-08
CA2689332A1 (en) 2009-01-08
JP2010531388A (ja) 2010-09-24

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