往复挤压道次对建筑Mg-5Sn-1Si合金板力学性能的影响

Effect of Reciprocating Extrusion Pass on Mechanical Properties of Building Mg-5Sn-1Si alloy plate

由于镁合金板具有高强度和防火特性,可用于声音隔离和保温材料,在高层建筑领域得到广泛应用。通过坩埚进行熔炼制备得到Mg-5Sn-Si镁合金,并对其进行300℃下往复挤压,研究挤压道次对力学性能的影响。结果表明:试样的力学性能随着挤压道次的增加而提高;随着晶粒尺寸的不断减小,多晶组织中形成了更多的晶界,达到强化材料组织的效果;随着挤压道次增加,细化强度现象更加明显,细小韧窝内形成更多球形Mg2Sn颗粒,进步一增强力学性能。

Due to its high strength and fire resistance,magnesium alloy sheets can be used as sound isolation and insulation materials,and are widely used in the field of high-rise buildings.Mg-5Sn-Si magnesium alloy was prepared by crucible melting and subjected to reciprocating extrusion at 300℃to study the effect of extrusion passes on mechanical properties.The results show that the mechanical properties of the sample increase with the increase of extrusion passes.With the continuous reduction of grain size,more grain boundaries are formed in the polycrystalline structure,achieving the effect of strengthening the material structure.As the number of extrusion passes increases,the phenomenon of refining strength becomes more obvious,and more spherical Mg2Sn particles are formed within the small tough dimples,which enhances the mechanical properties.