Al-Sr中间合金变质对铝镁硅型材组织与性能的影响  

Effect of Modification of Al-Sr Master Alloy on Microstructure and Properties of Al-Mg-Si Profile

作　　者：金祥龙 郑秀媛[2] 姜锋[2] 陈伟 

机构地区：[1]浙江乐祥铝业有限公司,浙江绍兴311800 [2]中南大学,湖南长沙410083

出　　处：《热加工工艺》2011年第21期47-49,共3页Hot Working Technology

摘　　要：采用金相显微镜,扫描电镜及能谱分析仪对Al-Sr中间合金对Al-Mg-Si合金的变质效果进行了对比研究。试验结果表明,添加Al-Sr变质剂对合金组织中所含的AlFeSi相起到了一定的变质作用,使该相呈鱼骨状,边缘圆钝化,内部应力集中减小,与基体间产生较强的界面连接,在保证力学性能的前提下,提高了型材的韧性和耐蚀性。The effect of Al-Sr master alloy on the microstructure and mechanical properties were studied by optical OM, SEM and EDS. The results show that Al-Sr master alloy is able to modify AIFeSi phase. The AIFeSi phase existing in the modified alloy appears as herring shape in large size with round boundary, which can reduce the internal stress concentration and promote the connection with the matrix. The addition of strontium can significantly increase the toughness and corrosion resistance of Al-Mg-Si profile, which can also ensure the mechanical properties.

关 键 词：Al-Mg-Si型材 AL-SR中间合金 微观组织 AlFeSi相 

分 类 号：TG146.22[一般工业技术—材料科学与工程]