东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2005, Vol. 26 ›› Issue (4): 245-248.DOI: -

• 论著 • 上一篇    下一篇

Mn对Al-Mg-Si-Cu铝合金车身板组织和性能的影响

刘宏;赵刚;刘春明;左良   

  1. 东北大学材料与冶金学院;东北大学材料与冶金学院;东北大学材料与冶金学院;东北大学材料与冶金学院 辽宁沈阳　110004
  • 收稿日期:2013-06-24 修回日期:2013-06-24 出版日期:2005-04-15 发布日期:2013-06-24
  • 通讯作者: Zhao, G.
  • 作者简介:-
  • 基金资助:
    教育部科学技术研究重大项目(0208);;国家高技术研究发展计划项目(2002AA331050);;教育部高等学校优秀青年教师教学科研奖励计划项目·

Effect of Mn addition on microstructures and properties of Al-Mg-Si-Cu system alloys for automotive body sheets

Liu, Hong (1); Zhao, Gang (1); Liu, Chun-Ming (1); Zuo, Liang (1)   

  1. (1) Sch. of Mat. and Metall., Northeastern Univ., Shenyang 110004, China
  • Received:2013-06-24 Revised:2013-06-24 Online:2005-04-15 Published:2013-06-24
  • Contact: Zhao, G.
  • About author:-
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摘要： 通过拉伸和埃里克森实验以及扫描电镜/能谱、透射电镜和金相分析,研究Mn的质量分数对Al Mg Si Cu铝合金汽车板显微组织、力学性能和成形性的影响·研究表明,随Mn质量分数增加,Al Mg Si Cu汽车板铝合金不可溶结晶相及弥散相粒子数量均增加,不可溶结晶相使合金组织纤维化对板材冲压成形性不利,弥散相粒子阻碍再结晶晶粒长大;提高Mn的质量分数,Al Mg Si Cu汽车板铝合金的强度增加,但延伸率和冲压成形性降低·

关键词: AlMgSiCuMn铝合金, 车身板, Al(FeMn)Si相, 弥散相, 冲压成形性

Abstract: By means of scan electron microscope (SEM), energy dispersive spectrum (EDS), transmission electron microscope (TEM), metallographic analysis, tensile and Ericsson tests, the effect of variation of the addition Mn content on the microstructures, tensile properties and formabilities of Al-Mg-Si-Cu system alloys for automotive body sheets was investigated. The results indicated that the numbers of insoluble constituents and dispersoids particles both increase with the increasing mass fraction of Mn in the alloys. The insoluble constituents of the distribution with continuous line in microstructures are unfavourable to the pressing formability of automotive body sheets, whereas the dispersoid particles will inhibit the growth of grains during recrystallization. Therefore, increasing the Mn mass fraction will improve the strength of the alloys but reduce their percentage elongation and pressing formability.

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