Effects of hydrogen content in liquid magnesium

sample thickness and degassing ways on micro-porosity in magnesium alloy have been investigated by quantitative hydrogen-measuring and quantitative metalography methods.The results show that micro-porosity in the magnesium alloy in the condition of the flux covering is more than that of the ones in the condition of inertial gas protection.With increasing in parts thickness

the micro-porosity in the magnesium alloy parts is increased with the same hydrogen content.Micro-porosity in the magnesium alloy can be reduced remarkably after Ar-degassing with flux protection

which obviously improves the tensile strength by 25% and the elongation by 50% compared with the parts without Ar-degassing treatment.