蛇形通道制备工艺对6061铝合金半固态浆料的影响  

Effect of Serpentine Channel Preparation Method on Semi-solid Slurry of 6061 Aluminum Alloy

作　　者：耿晓鑫 毛卫民[1] 李乃拥 Geng Xiaoxin;Mao Weimin;Li Naiyong(School of Materials Science and Engineering,University of Science and Technology Beijing)

机构地区：[1]北京科技大学材料与科学工程学院,北京100083

出　　处：《特种铸造及有色合金》2021年第7期900-904,共5页Special Casting & Nonferrous Alloys

基　　金：国家自然科学基金资助项目(51771032)。

摘　　要：采用石墨蛇形通道制备了6061铝合金半固态浆料,研究了浇注温度、弯道内径以及Si含量对半固态浆料组织的影响。结果表明,蛇形通道制备的6061铝合金半固态浆料比传统铸造工艺得到的组织球化和细化效果更好。初生α-Al晶粒细化至66.37μm。随着Si含量增加,晶粒球化效果和细化效果更显著。当Si含量为1.2%时,初生α-Al晶核的平均晶粒直径和形状因子分别为42.85μm和0.83。当浇注温度为660~690℃,通道内径为20mm时,制备的6061铝合金半固态浆料更好。The semi-solid slurry of 6061aluminum alloy was prepared via a serpentine pouring channel.The influences of pouring temperature,bend inner diameterand the content of Si element on microstructure of the alloy slurry were investigated.The results indicate that the semi-solid slurry prepared by the serpentine channel has superior spheroidization and refinement effects to the traditional casting process,where the primaryα-Al grains are refined to 66.37μm.With the Si content increasing,the spheroidizing and refining effect of grains become more significant.When the Si content is 1.2%,the average grain diameter and shape factor of the primaryα-Al grain are 42.85μm and 0.83,respectively.When the pouring temperature is 660~690℃ and the channel inner diameter is 20mm,the prepared semi-solid slurry of 6061aluminum alloy has a desirable effect.

关 键 词：蛇行通道 6061铝合金 半固态 组织演变 

分 类 号：TG146.21[一般工业技术—材料科学与工程] TG249.2[金属学及工艺—金属材料]