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

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.