CAJ | 학술논문

采用拉伸试验机、金相显微镜和等径道角挤压等试验方法对Mg-Al系镁合金半固态坯料制备及触变挤压过程进行了研究.结果表明,等径道角挤压工艺对Mg-Al系镁合金有很好的应变诱导效果.经过等径道角挤压的Mg-Al系镁合金力学性能高,晶粒细小.等径道角挤压+等温处理方法制备的Mg-Al系镁合金半固态坯的微观组织晶粒细小,球化程度高,微观组织非常均匀.生产的AZ61、AZ80、AZ91D和AM60镁合金角框零件的微观组织细小,抗拉强度分别达到306.8、308.3、299.8、321.6MPa.伸长率分别达到21.6%、28.4%、14.6%和29.6%.
채용랍신시험궤、금상현미경화등경도각제압등시험방법대Mg-Al계미합금반고태배료제비급촉변제압과정진행료연구.결과표명,등경도각제압공예대Mg-Al계미합금유흔호적응변유도효과.경과등경도각제압적Mg-Al계미합금역학성능고,정립세소.등경도각제압+등온처리방법제비적Mg-Al계미합금반고태배적미관조직정립세소,구화정도고,미관조직비상균균.생산적AZ61、AZ80、AZ91D화AM60미합금각광령건적미관조직세소,항랍강도분별체도306.8、308.3、299.8、321.6MPa.신장솔분별체도21.6%、28.4%、14.6%화29.6%.
By means of tensile testing machine, metalloscope and equal channel angular extrusion (ECAE) testing, preparation of Mg-Al magnesium alloy semi-solid billets and its thixo-extrusion forming were investigated. The results show that desirable strain induced effects can be obtained by ECAE. After Mg-Al magnesium alloy was processed by ECAE, mechanical properties was increased with the refinement of grain size. Semi-solid billets prepared by new SIMA were characterized by fine grains, desirable spheroidization and homogeneous microstructure. In contrast, semi-solid billets prepared by direct isothermal treatment were characterized by coarse grain and terrible spheroidization. High mechanical properties and fine grains occur in angle frame components manufacture by thixo-extruding new SIMA prepared Mg-Al series semi-solid billets including AZ61, AZ80, AZ91D and AM60. Tensile strengthes of angle frame components reach 306.8, 308.3, 299.8 and 321.6MPa, respectively, and elongations are 21.6%, 28.4%, 14.6% and 29.6%, respectively.