CN87106745A - 铝镁锌锆系超塑性合金 - Google Patents

铝镁锌锆系超塑性合金 Download PDF

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CN87106745A
CN87106745A CN87106745.5A CN87106745A CN87106745A CN 87106745 A CN87106745 A CN 87106745A CN 87106745 A CN87106745 A CN 87106745A CN 87106745 A CN87106745 A CN 87106745A
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zinc
alloy
aluminum
magnesium
superplastic
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CN1005993B (zh
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周铁城
汤德芬
张治民
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Beijing Institute Of Nonferrous Metals And Rare Earth Applications
TAIYUAN MACHINERY COLLEGE
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Beijing Institute Of Nonferrous Metals And Rare Earth Applications
TAIYUAN MACHINERY COLLEGE
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Priority to CN87106745.5A priority Critical patent/CN1005993B/zh
Publication of CN87106745A publication Critical patent/CN87106745A/zh
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Abstract

铝镁锌锆系超塑性合金，主要化学组份为Mg5～7wt％，Zn1～2wt％，Mn0.5～1.0wt％，Cr0.1～0.2wt％，Zr0.3～0.5wt％，Al其余将上述组份用常规方法熔炼铸成扁坯。经450～480℃均匀化处理，在350℃～150℃温轧成薄板，经440℃～460℃再结晶处理。超塑性能在510℃～530℃，≈10-3S-1的条件下，m≥0.45，δ≥800％。常温机械性能δb≥400Mpa，δ0.2≥200Mpa，δ≥25％。

Description

本发明属于合金技术领域。
到目前为止，铝镁系超塑性合金，没有以锌作为合金元素的，当锌以杂质存在时，含量小于0.25%。在变形铝镁合金中，日本专利昭60125346、昭60174845，虽然含有0.5～2.5%的锌，但锆含量小于0.3%，不是超塑性合金。本发明是一种超塑性合金。
本发明的任务是寻求一种适于制造在潮湿大气或海水环境中工作的复杂结构件的超塑性铝合金。并具有较高的机械性能，较高的腐蚀、应力腐蚀抗力，良好的焊接性。
本发明主要合金元素的含量及作用。
Al：Al是合金的基本元素。
Mg：随Mg含量增加，强度提高。Mg＜5%不能充分提高强度。而Mg＞7%，塑性、耐蚀性明显降低，Mg＝5～7%，形成焊接裂纹的倾向也最小，所以含Mg量取5～7%。
Zn：含1～2%的Zn是本合金成份的主要特征。当含Mg＝5～7%时，加入1～2%的Zn，可以提高合金的强度，而不损害合金的耐蚀性，且会改善应力腐蚀抗力，降低焊接裂纹的形成倾向，并有利于超塑处理，改善超塑性。
Cr和Mn：有细化晶粒，提高强度，改善耐蚀性的作用，所以取Cr    0.1～0.2%，Mn0.5～1.0%。
Zr：在超塑性铝合金中，Zr是细化晶粒并使之保持稳定的主要元素，所以取Zr为0.3～0.5%。
按以上所述的成份比例，（参见表1）用常规方法熔炼后激冷铸造成扁坯;经450～480℃均匀化处理，保温20～30hr，水冷;然后在350～150℃温轧成薄板，总变形量＞80%;最后在440～460℃进行再结晶处理。获得细晶粒组织（晶粒平均直径小于10μm）。将制成的板材，进行超塑性，常温机械性能及耐蚀性试验。试验结果与对比合金比较，如表2、表3、表4所示。
表1
Figure 87106745_IMG1
Figure 87106745_IMG2
耐蚀性（重量损失）    表4
Figure 87106745_IMG3

Claims (1)

  1. 一种超塑性合金，以AL为基本组元，含mg.Mn.Cr(或V.或Ti).Zn.Zr，其特征在于含Zn1.0～2.0%，Zr0.3～0.5%，并具有细晶粒组织，晶粒平均直径小于10μm。
CN87106745.5A 1987-10-04 1987-10-04 铝镁锌锆系超塑性合金 Expired CN1005993B (zh)

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Application Number Priority Date Filing Date Title
CN87106745.5A CN1005993B (zh) 1987-10-04 1987-10-04 铝镁锌锆系超塑性合金

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CN87106745.5A CN1005993B (zh) 1987-10-04 1987-10-04 铝镁锌锆系超塑性合金

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CN87106745A true CN87106745A (zh) 1988-06-08
CN1005993B CN1005993B (zh) 1989-12-06

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1049990C (zh) * 1995-05-23 2000-03-01 孙柱章 一种口算编码计算机汉字输入法
US6238495B1 (en) * 1996-04-04 2001-05-29 Corus Aluminium Walzprodukte Gmbh Aluminium-magnesium alloy plate or extrusion
CN103882353A (zh) * 2014-03-24 2014-06-25 北京工业大学 一种提高含铒铝镁合金强度及耐损伤性能的温变形工艺

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1049990C (zh) * 1995-05-23 2000-03-01 孙柱章 一种口算编码计算机汉字输入法
US6238495B1 (en) * 1996-04-04 2001-05-29 Corus Aluminium Walzprodukte Gmbh Aluminium-magnesium alloy plate or extrusion
CN103882353A (zh) * 2014-03-24 2014-06-25 北京工业大学 一种提高含铒铝镁合金强度及耐损伤性能的温变形工艺
CN103882353B (zh) * 2014-03-24 2016-04-06 北京工业大学 一种提高含铒铝镁合金强度及耐损伤性能的温变形工艺

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