金属型铸造中Sb对重力浇铸ZL114A合金组织的影响  

Effects of Sb on Microstructure of Gravity Casting ZL114A Alloy in Metal Mold Casting

作　　者：刘闪光 虞秀勇 李大奎 刘行 毛郭灵 高文理[4] LIU Shanguang;YU Xiuyong;LI Dakui;LIU Xing;MAO Guoling;GAO Wenli(AECC Beijing Institute of Aeronautical Materials,Beijing 100095,China;Beijing Engineering Research Center of Advanced Aluminum Alloys and Applications,Beijing 100095,China;First Company of China Eighth Engineering Division Ltd.,Ji'nan 250000,China;College of Materials Science and Engineering,Hunan University,Changsha 410082,China)

机构地区：[1]中国航发北京航空材料研究院,北京100095 [2]北京市先进铝合金材料及应用工程技术研究中心,北京100095 [3]中建八局第一建设有限公司,山东济南250000 [4]湖南大学材料科学与工程学院,湖南长沙410082

出　　处：《热加工工艺》2023年第17期55-58,共4页Hot Working Technology

摘　　要：利用偏光显微镜、扫描电子显微镜和透射电子显微镜研究了金属型铸造条件下Sb对重力浇铸ZL114A合金组织的影响。结果表明,金属型铸造条件下,在ZL114A合金中添加Sb后,其初生α-Al晶粒的尺寸和形貌没有变化,共晶相(包括共晶α-Al和共晶Si)的体积分数减少,共晶Si被变质,铸态合金中的共晶Si变短但没有出现明显的分枝,热处理之后共晶Si更短、球化程度更高,其变质机理为共晶Si的形核核心增加。The effects of Sb on the microstructure of gravity casting ZL114A alloy in metal mold casting were studied by means of polarized light microscope,scanning electron microscope and transmission electron microscope.The results show that the size and morphology of primary α-Al grains remain unchanged after adding Sb to the alloy under the metal mold casting conditions,the volume fraction of eutectic phase(including eutectic α-Al and eutectic Si) decreases,the eutectic Si is modified,and the eutectic Si in as-cast alloy becomes shorter without obvious branching.The shorter the eutectic Si after heat treatment,the higher the degree of spheroidization.The modification mechanism is the increase of the nucleation cores of eutectic Si.

关 键 词：ZL114A合金 金属型铸造 初生Α-AL 共晶Si 变质机理 

分 类 号：TG292[金属学及工艺—铸造] TG146.21[一般工业技术—材料科学与工程]