CAJ | 학술논문

对2A50铝合金液态模锻组织性能均匀化控制进行研究,采有简单加载和复合加载两种方式成形负重轮制件.结果表明:简单加载方式成形的制件,各部之间存在组织和性能的不均匀性,壁部的组织较底部粗大,力学性能也较低,制件的转角处存在缺陷.通过采用复合加载,制件壁部的组织和性能得到明显提高.随着补缩量的增加,制件各部之间的组织和性能趋于均匀化.补缩量为4mm时,转角处的缺陷逐渐消失；补缩量为10mm时,制件可以获得均匀细小的微观组织,晶粒大小为20-30 μm,抗拉强度为355 MPa,伸长率为10％.采用复合加载可以控制液态模锻制件的组织和性能.
대2A50려합금액태모단조직성능균균화공제진행연구,채유간단가재화복합가재량충방식성형부중륜제건.결과표명:간단가재방식성형적제건,각부지간존재조직화성능적불균균성,벽부적조직교저부조대,역학성능야교저,제건적전각처존재결함.통과채용복합가재,제건벽부적조직화성능득도명현제고.수착보축량적증가,제건각부지간적조직화성능추우균균화.보축량위4mm시,전각처적결함축점소실；보축량위10mm시,제건가이획득균균세소적미관조직,정립대소위20-30 μm,항랍강도위355 MPa,신장솔위10％.채용복합가재가이공제액태모단제건적조직화성능.
The homogenization on microstructure and mechanical properties of 2A50 aluminum alloy prepared by liquid forging was investigated.Wheel hubs were produced using direct and compound loading.The results show that the microstructure and mechanical properties are inhomogeneous in direct forged samples.The microstructure of the wall is coarser than that of the base,and the mechanical properties are lower and some defects are detected at the wheel comer.Using compound loading,the microstructure and mechanical properties of the wall are improved evidently.With increasing feeding amount,the microstructure and mechanical properties become more homogeneous.The defects disappear when the feeding amount is 4 mm.The forged wheel hubs could obtain fine and homogeneous microstmcture with grain size of 20-30 μm,tensile strength of 355 MPa and elongation of 10％ when the feeding amount is 10 mm.The microstructure and mechanical properties of liquid forged workpieces could be controlled and homogenized using compound loading.