熔化条件和除气工艺对镁熔体含氢量的影响

Effects of Melting Condition and Degassing Processes on Hydrogen Content in Magnesium Alloy Melt

利用自行开发的镁合金定量测氢仪研究了熔化条件和除气工艺对镁熔体含氢量的影响。研究结果表明,镁熔体中的含氢量随温度的升高而增大;气体保护下熔炼比熔剂保护的效果好,含氢量较低;随保温时间的延长,气体保护下的镁熔体含氢量几乎没变化,而熔剂保护下的含氢量成小幅上升趋势;采用Ar气除气工艺的效果比C2Cl6除气更有效,镁熔体含氢量更低。

Effects of melting condition and degassing processes on hydrogen content in magnesium alloy melt were investigated with a self-developed instrument for measuring hydrogen content. The results show that hydrogen content in magnesium melt increases with the increase of temperature. Gas protection during melting is more efficient than flux protection, and there has less hydrogen content in the melt. With the increase of holding time hydrogen content in magnesium melt under flux protection increases slowly, but nearly not change under gas protection. Degassing with Ar gas is more effective than C2Cl6 degassing and leads to less hydrogen level in the melt.