Fabrication of Thin Aluminum Alloy Slab and Technological Development for Its Application

铝合金薄板坯的制备及其应用技术开发

基本信息

  • 批准号:
    10555228
  • 负责人:
  • 金额:
    $ 1.73万
  • 依托单位:
  • 依托单位国家:
    日本
  • 项目类别:
    Grant-in-Aid for Scientific Research (B).
  • 财政年份:
    1998
  • 资助国家:
    日本
  • 起止时间:
    1998 至 2000
  • 项目状态:
    已结题

项目摘要

The main purpose of this study is to fabricate a thin aluminum alloy slab using electromagnetic casting(EMC), which will enable us to make a thin plate only by cold rolling without hot rolling and intermediate annealing, . Firstly relationships between outward appearances and manufacturing conditions were investigated. Fabrication of billets as raw materials for semi-solid forming were also tried to confirm the characterization of EMC.Furthermore, mechanical properties of the rolled plates and the semi-solid formings manufactured using the EMC slabs and billets were evaluated. Obtained results are summarized as follows ;(1) At the early stage of continuous casting the meniscus thickness largely depends on the thickness of bottom block and as a result the fabricated slab thickness is nearly equal to the thickness of bottom block. When the thin slab is fabricated under a casting speed of 960mm/min and a water cooling rate of 20L/min, it has a uniform thickness of 7mm, smooth surface and … More equiaxed grains. Application of EMC to the fabrication of thin slab makes the microstructure to be very fine up to dendrite arm spacing of 10μm due to a large cooling rate caused by the thin thickness and direct water cooling. Such a fine microstructure leads to a good rolling ability up to the rolling ratio of 75% with no edge cracks.(2) Crystallized compounds increase with increase in Fe content and cooling rate, but the tensile properties of the rolled thin plate are improved because the compounds are fine and distribute uniformly and, therefore, useful for the dispersion strengthening and for refining the recrystallized grains. As a result, even when 5052 aluminum alloy contains a large amount of Fe as an impurity, tensile properties of heat-treated sheets of directly cold rolled EM cast thin slabs satisfy JIS requirements if Mg content is reduced to 2.05% which is smaller than the lower limit specified by JIS for 5052 aluminum alloy. This indicates that the application of EMC to the fabrication of the thin slab is very useful for reduction of bad influences by impurities.(3) Addition of a grain refiner and application of EMC process ensures the production of sound billets with fine and equiaxed grain throughout the entire structure. Upon semi-solid forming using the billets at optimum temperatures, fine and nearly spherical solid particles distribute uniformly throughout the formed specimens and an increase in fluidity even for thin parts are observed for all investigated alloy. Furthermore, tensile properties of T6-treated specimens of semi-solid formed samples of 7475 and A357 aluminum alloys are close to those of the forged samples of 7475 wrought alloy and A357 casting aluminum alloy sample thixocast using billets fabricated by DC casting with electromagnetic stirring, respectively. Less
本研究的主要目的是利用电磁铸造(EMC)制造薄板铝合金,使我们能够只进行冷轧而不进行热轧和中间退火。首先研究了外观与制造条件的关系。同时,还尝试了半固态成形坯料的制备,以确定电磁兼容的特性。此外,还评估了用电磁干扰板和钢坯制造的轧制板和半固态成形件的力学性能。所得结果总结如下:(1)在连铸初期,半月板厚度在很大程度上取决于底块的厚度,因此铸坯的厚度几乎等于底块的厚度。当浇铸速度为960mm/min,水冷速度为20L/min时,薄板坯厚度均匀,为7mm,表面光滑,晶粒等轴性好。采用电磁兼容技术制备薄板,由于薄板厚度较薄且直接水冷却导致冷却速率大,使得组织非常精细,枝晶臂间距可达10μm。良好的微观组织使其具有良好的轧制性能,轧制率可达75%,且无边缘裂纹。(2)随着铁含量的增加和冷却速度的增加,结晶化合物增加,但由于这些化合物细小且分布均匀,有利于弥散强化和再结晶晶粒的细化,使轧制薄板的拉伸性能得到改善。结果表明,即使5052铝合金中含有大量的Fe杂质,当Mg含量低于5052铝合金的最低标准值2.05%时,直接冷轧EM铸薄板热处理板材的拉伸性能仍能满足JIS的要求。这表明电磁兼容在薄板制造中的应用对于减少杂质的不良影响是非常有用的。(3)晶粒细化机的加入和电磁兼容工艺的应用,保证了整个结构中晶粒细小等轴的良好坯料的生产。在最佳温度下使用坯料进行半固态成形时,细小且接近球形的固体颗粒均匀分布在整个成形试样中,并且在所研究的所有合金中观察到即使是薄零件的流动性也有所增加。7475铝合金半固态成形试样和A357铝合金半固态成形试样经t6处理后的拉伸性能分别接近于7475变形合金和A357铸造铝合金电磁搅拌小方坯的锻件的拉伸性能。少

项目成果

期刊论文数量(44)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
S.Kamado, T.Kosaka, Y.Kabayama, Y.Kojima, T.Muramatsu and M.Matsuo: "Fabrication of 5052 Aluminum Alloy Thin Slab by Electromagnetic Casting and Mechanical Properties of Its Cold-Rolled Sheet"Solidification & Gravity 2000, Materials Science Forum, 329-330
S.Kamado、T.Kosaka、Y.Kabayama、Y.Kojima、T.Muramatsu 和 M.Matsuo:“5052 铝合金薄板坯的电磁铸造及其冷轧板的力学性能”凝固
  • DOI:
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    0
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A.F.Hasbullah, R.S.Rachmat, S.Kamado, Y.Kojima, S.Iwasawa: "Microstructure and Tensile Properties of Thixocast A357 Aluminum Alloy"Abstracts of Annual Conf. of Japan Institute of Metals, Hokuriku-Sinetsu Branch. 96 (2000)
A.F.Hasbullah、R.S.Rachmat、S.Kamado、Y.Kojima、S.Iwasawa:“Thixocast A357 铝合金的微观结构和拉伸性能”年会摘要
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    0
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Y. Kabayama, I. Fujisaki, S. Kamado, Y. Kojima and T. Muramatsu: "Microstructure and Tensile Properties of Thin Aluminum Alloy Slabs fabricated by Electromagnetic Casting"Abstracts of the 95th Conf. of Japan Institute of Light Metals. 293-294 (1998)
Y. Kabayama、I. Fujisaki、S. Kamado、Y. Kojima 和 T. Muramatsu:“电磁铸造薄铝合金板的微观结构和拉伸性能”第 95 届会议摘要
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    0
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R.S.Rachmat,H.Takano,N.Ikeya,S.Kamado and Y.Kojima: "Application of Semi-Solid Forming to 2024 and 7075 Wrought Aluminum Alloy Billets Fabricated by EMC Process"Solidification & Gravity 2000,Materials Science Forum,(Proc.of The 3rd Intern.Conf.on Solidifi
R.S.Rachmat、H.Takano、N.Ikeya、S.Kamado 和 Y.Kojima:“半固态成形在 EMC 工艺制造的 2024 和 7075 变形铝合金坯料中的应用”凝固
  • DOI:
  • 发表时间:
  • 期刊:
  • 影响因子:
    0
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  • 通讯作者:
Shigeharu Kamado: "Fabrication of 5052 Aluminum Alloy Thin Slab by Electromagnetic Casting and Mechanical Properties of Its Cold-rolled Sheet"Materials Science Forum (Solidification and Gravity 2000). Vol.329-330. 473-478 (2000)
Shigeharu Kamado:“电磁铸造制造5052铝合金薄板及其冷轧板的力学性能”材料科学论坛(凝固与重力2000)。
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KAMADO Shigeharu其他文献

KAMADO Shigeharu的其他文献

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{{ truncateString('KAMADO Shigeharu', 18)}}的其他基金

Elucidation of the high-performance expression mechanism of heterostructural magnesium alloys and its application to the structural control
异质结构镁合金高性能表达机制的阐明及其在结构控制中的应用
  • 批准号:
    25249101
  • 财政年份:
    2013
  • 资助金额:
    $ 1.73万
  • 项目类别:
    Grant-in-Aid for Scientific Research (A)
Suppression of twin deformation by ordered nano-scale precipitate and its application to room temperature forming
有序纳米级析出物抑制孪晶变形及其在室温成形中的应用
  • 批准号:
    23656455
  • 财政年份:
    2011
  • 资助金额:
    $ 1.73万
  • 项目类别:
    Grant-in-Aid for Challenging Exploratory Research
Establishment of multi-scale structural controlling process technology aiming to high performance common magnesium alloys
高性能普通镁合金多尺度组织控制工艺技术的建立
  • 批准号:
    22246094
  • 财政年份:
    2010
  • 资助金额:
    $ 1.73万
  • 项目类别:
    Grant-in-Aid for Scientific Research (A)
Establishment of Green Processing Technology for Magnesium Alloys
镁合金绿色加工技术的建立
  • 批准号:
    17206076
  • 财政年份:
    2005
  • 资助金额:
    $ 1.73万
  • 项目类别:
    Grant-in-Aid for Scientific Research (A)
Fabrication of Premium Magnesium Castings by Semi-solid Forming Process
采用半固态成型工艺制造优质镁铸件
  • 批准号:
    11225207
  • 财政年份:
    1999
  • 资助金额:
    $ 1.73万
  • 项目类别:
    Grant-in-Aid for Scientific Research on Priority Areas
Microstructural Control of Mg_2Ni Hydrogen Absorbing Alloys by Rapid Solidification and Mechanical Grinding
快速凝固和机械研磨对Mg_2Ni吸氢合金的显微组织控制
  • 批准号:
    09650757
  • 财政年份:
    1997
  • 资助金额:
    $ 1.73万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
Development of Aluminum Recycling Technology
铝回收技术的发展
  • 批准号:
    07555187
  • 财政年份:
    1995
  • 资助金额:
    $ 1.73万
  • 项目类别:
    Grant-in-Aid for Scientific Research (A)

相似海外基金

Mathematical and Physical Modeling of Electromagnetic Casting
电磁铸造的数学和物理建模
  • 批准号:
    8520783
  • 财政年份:
    1986
  • 资助金额:
    $ 1.73万
  • 项目类别:
    Continuing Grant
Development of Hirizontal Electromagnetic Casting Method.
水平电磁铸造方法的发展。
  • 批准号:
    61850125
  • 财政年份:
    1986
  • 资助金额:
    $ 1.73万
  • 项目类别:
    Grant-in-Aid for Developmental Scientific Research
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