通过拉伸实验、光镜观察、电镜观察以及EBSD测试等手段研究了中间退火加热速率对Al-Mg-Si合金板材组织、织构及力学性能的影响.结果表明,采用两种不同加热速率(快速和慢速)的中间退火方式会产生不同晶粒形态的中间退火显微组织.采用慢速加热中间退火热处理的T4P态(预时效加自然时效)合金板材的强度及应变强化指数n值与采用快速加热中间退火热处理的T4P态合金板材的基本相同,但△r值要明显低于后者,且二者的力学性能均呈各向异性.二者的再结晶晶粒组织均为等轴晶,前者的平均晶粒尺寸略大于后者的.二者的织构组分均为H{001} <110>,但后者的织构密度要稍强于前者,正是织构密度上的差异导致了二者△r值的差异.
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