浅析工艺参数对8011合金铸轧带坯中心偏析的影响  

The Effect of Process Parameters on the Center Segregation Structure of 8011 Alloy Twin-Roll Casting Strip

作　　者：刘建廷 张开宝 孙和宣 LIU Jianting;ZHANG Kaibao;SUN Hexuan(Gansu Dongxing Jiayu New Material Co.Ltd.,Jiayuguan 735100,China)

机构地区：[1]甘肃东兴嘉宇新材料有限公司,甘肃嘉峪关735100

出　　处：《甘肃冶金》2024年第4期119-122,共4页Gansu Metallurgy

摘　　要：应用金相显微镜(OM)和电子探针(EPMA)对不同铸轧工艺条件下的8011铸轧带坯中心偏析组织进行分析,研究各铸轧工艺参数变化对铸轧带材中心偏析缺陷的影响。结果表明:过高的冷却水温度和较大的铸轧区长度不利于8011合金铸轧带材中心偏析缺陷的控制,铸轧速度对中心偏析缺陷的影响最为敏感,当铸轧速度达到780 mm/min以上时中心偏析缺陷急剧恶化,显著影响铸轧带坯的组织性能。8011合金铸轧带坯中心偏析缺陷是由Al、Fe、Si组成的β-Al 5FeSi+α-Al的复合化合物,是结晶过程中形成的非平衡过共晶组织。Metallographic microscope(OM)and electron probe(EPMA)were used to analyze the center segregation structure of 8011 cast-rolled strip under different casting and rolling process conditions,and the influence of different casting and rolling process parameters on the center segregation defects of cast-rolled strip was studied.The results show that high cooling water temperature and large casting and rolling zone length are not conducive to the control of the center segregation defect of 8011 alloy cast-rolled strip.The influence of casting and rolling speed on the center segregation defect is the most sensitive.When the casting and rolling speed reaches 780 mm/min or more,the center segregation defect deteriorates sharply,which significantly affects the microstructure and properties of the strip.The center segregation defect of cast-rolled strip of 8011 alloy is a compound ofβ-Al 5FeSi+α-Al composed of Al,Fe and Si,which is a non-equilibrium hypereutectic structure formed during crystallization.

关 键 词：双辊铸轧 工艺参数 中心偏析 凝固 铸轧速度 

分 类 号：TG146.2[一般工业技术—材料科学与工程]