摘要
通过XRD,OM和TEM组织观察、织构测定等方法研究了冷轧Al-1.3Si-0.7Mg-0.7Cu-0.3Mn铝合金汽车车身板在固溶处理过程中其合金相、晶粒、织构组态的变化.结果表明:Al-1.3Si-0.7Mg-0.7Cu-0.3Mn合金冷轧薄板中存在Al9Fe0.84Mn2.16Si,Al95Fe4Cr和Al6Mn不可溶合金相及Al1.9CuMg4.1Si3.3和Mg2Si可溶合金相;尺寸小于1μm的可溶合金相在540℃盐浴固溶中保温12 min以上即可全部溶入基体;冷轧薄板在540℃固溶保温2 min即可完成再结晶,形成{001}〈310〉和{110}〈113〉再结晶织构,其中以{001}〈310〉组分为主,但两种再结晶织构的强度均偏低.延长固溶保温时间至60 min,晶粒尺寸、形状及织构组态无明显变化.
The evolution of intermetallic phases, grains and textures of cold rolled Al-1.3Si-0.7Mg-0.7Cu-0.3Mn alumintLm alloy sheets during solution treatment at 540 ℃ was investigated by XRD, OM and TEM observation and texture measurement. The results showed that there are many insoluble intermetallic phases such as Al9Fe0.84Mn2.16Si, Al95Fe4Cr and Al6Mn in the ascold rolled alloy sheets, as well as some soluble ones including Al1.9CuMg4.1Si3.3 and Mg2Si. The soluble intermetallic phases smaller than 1 μm can be dissolved completely into matrix when the cold rolled sheets are bathed in molten salt at 540℃ for over 12 min, and the sheets can be recrystallized within 2 min through solution treatment at 540 ℃ to form the recrystalline textures {001} 〈310〉 and {110} 〈113〉, where the former is dominant and both are of low intensity. It was revealed that the size and shape of recrystallized grains and the component of recrystalline textures change un-obviously when lengthening the time for solution treatment at 540 ℃ to 60 min.
出处
《东北大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2008年第1期73-76,共4页
Journal of Northeastern University(Natural Science)
基金
教育部科学技术研究重大项目(302008)
关键词
6×××系铝合金
车身板
固溶处理
再结晶
织构
6××× series aluminum alloy
automotive body sheet
solution treatment
recrystallization
texture
