研究了镁合金间接挤压铸造工艺及模具。采用全封闭式气压定量输送装置 ,应用N2 或Ar气排除挤压模型腔中的空气 ,有效避免镁合金液在转运、浇注及挤压成形时的氧化和阻燃 ;采用挤压充填速度为 2 .0~ 2 .5m/s,挤压力为 5 0 0kN ,生产出组织致密的镁合金挤压零件 ;模具的挤压活塞和定量室浇口套设计独立的加热装置 ,加热温度为 45 0~ 5 0 0℃ ,挤压活塞和定量室浇口套两者之间单边配合间隙取 0 .0 2~ 0 .0 5mm。
The indirect squeezing casting process and the die structure for the Mg alloy were investigated. With full sealed quantitative pneumatic transporting system and air removal from die cavity with N 2 or Ar gas. It is effective to prevent Mg alloy from oxidation and ignition during transpotation, pouring and forming. In the case of filling rate 2.0~2.5 m/s and squeezing force 500 kN, the Mg alloy castings with sound structure was produced. Specially designed independent heating device was used for heating the plunger and the sleeve in the quantitative chamber up to 450~500 ℃. The single clearance between plunger and the sleeve equaled 0.02~ 0.05 mm.
相关作者
相关机构