Cu含量对汽车车身板用Al-1.0Mg-1.0Si-0.6Mn合金显微组织的影响

材料与冶金学报, 2010, 09(2): 127-132. doi: 10.3969/j.issn.1671-6620.2010.02.012

Cu含量对汽车车身板用Al-1.0Mg-1.0Si-0.6Mn合金显微组织的影响

田妮 ^1, , 赵刚 ^2, , 黄涛 ^3, , 王建军 ^4, , 刘春明 ^5,

1.东北大学,材料各向异性与织构教育部重点实验室,沈阳,110819

2.东北大学,材料各向异性与织构教育部重点实验室,沈阳,110819

3.沈阳师范大学,物理科学与技术学院,沈阳,110034

4.东北大学,材料各向异性与织构教育部重点实验室,沈阳,110819

5.东北大学,材料各向异性与织构教育部重点实验室,沈阳,110819

基金项目: 沈阳市人才资源开发项目中央高校基本科研业务费(90302003) 辽宁省教育厅科学技术研究项目(2008T184) 国家高技术研究发展计划(863计划)项目(2007AA03Z551)

关键词： Al-Mg-Si-Cu合金 , 汽车板 , 结晶相 , 晶粒尺寸

Effects of Cu content on the microstructures of Al-1.0Mg-1.0Si-0.6Mn alloy used for automotive body sheets

采用金相、SEM/EDS、XRD等研究了Cu含量对汽车车身用Al-1.0Mg-1.0Si-0.6Mn(in wt.%)铝合金结晶相及合金板材晶粒的影响规律.结果表明:Al-1.0Mg-1.0Si-(0.1～0.7)Cu-0.6Mn合金中主要存在部分可溶的浅灰色不规则条块状Al8(FeMn)2Si和黑色条块状或骨骼状结晶相Mg2Si,及完全可溶的球状或椭球状主要含Al 1.9CuMg 4.1Si 3.3多相共晶产物;随着Cu含量增加,铸态合金中主要含Al1.9CuMg4.1Si3.3的共晶产物数量逐渐增多,而Mg2Si和Al8(FeMn)2Si结晶相变化不明显;同时,固溶后合金板材的再结晶晶粒变得越来越细,尽管Cu含量对合金冷轧板的晶粒尺寸影响不明显.

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