多向锻造及时效处理强韧化变形铝合金  

A Wrought Aluminum Alloy Strengthening and Toughening by Multidirectional Forging and Aging Treatment

作　　者：严伟林[1] 

机构地区：[1]广西大学材料科学与工程学院,广西南宁530004

出　　处：《装备制造技术》2012年第8期1-2,共2页Equipment Manufacturing Technology

基　　金：国家自然科学基金项目(51061005)

摘　　要：利用多向锻造及时效处理技术加工变形铝合金,使铝合金具有高强度和良好的塑性。研究结果表明,试样组织显著细化且超细的第二相微粒弥散分布,抗拉强度和硬度大幅度增加且塑性良好,抗拉强度和延伸率分别为396.3 MPa和11.08%。锻件强度的大幅度提高,是由于组织显著细化且超细的第二相微粒弥散分布;经多次累积应变和时效处理改善晶界状态,同时,时效处理也减少锻造应力,使锻件的塑性增强。In this work,a wrought aluminum alloy was processed by multidirectional forging and aging treatment.The results show that the microstructure of alloy was refined markedly and the ultrafine second-phase particles were dispersively distributed.The alloy exhibited high strength,high hardness and good ductility.The tensile strength and elongation of alloy are 396.3 MPa and 11.08%,respectively.The strength is increased markedly due to refinement microstructure and dispersively distributed ultrafine second-phase particles.Because of the morphology of grain boundary is improved by accumulating strain and aging treatment,the ductility is enhanced.In addition,the ductility is also improved due to aging treatment reducing the forging stress.

关 键 词：铝合金 多向锻造 时效处理 强度 塑性 

分 类 号：TG146.21[一般工业技术—材料科学与工程]