熔炼工艺对铸造铝青铜微观组织与性能的影响  

Effect of Melting Process on Microstructure and Mechanical Properties of Aluminum Bronze Casting Alloy

作　　者：李增辉[1] 黄根哲[1] 

机构地区：[1]长春理工大学机电工程学院,吉林长春130022

出　　处：《热加工工艺》2012年第10期51-54,共4页Hot Working Technology

摘　　要：采用两种不同的加料顺序,制备了ZCuAl10Fe3Mn2铸造铝青铜合金。利用光学显微镜、扫描电镜、能谱仪和X-射线衍射仪对两种合金的铸态组织结构、物相组成和力学性能等进行了对比研究。结果表明,加料顺序的不同能显著影响铝青铜合金的组织结构和性能;"先铝后铜"顺序下,基体中主要为α相、微量相为γ2相和K相;"先铜后铝"顺序下,基体仍以α相为主,但含量明显减少,出现次量相β'相,微量相为γ2相和K相。研究结果还表明,和"先铜后铝"加料顺序相比较而言,"先铝后铜"顺序获得的铸件组织更细密,并且其强化相γ2相和K相均匀分布在基体中,起到了很好的强化效果。By using two kinds of charging sequences,ZCuAl10Fe3Mn2 aluminum bronze casting alloy was prepared.The optical microscope,scanning electron microscope（SEM）,energy dispersive spectrometer（EDS） and X-Ray Diffractometer（XRD） were applied to reveal their microstructural details,phase composition and the mechanical properties in as-cast.The results show that,different charging sequence can significantly influence the microstructure and properties of aluminum bronze casting alloy.In the sequence of ＂first aluminum then copper＂,main phase is α and there is a little of phase γ2 and phase K in the matrix;while in the order of ＂first copper then aluminum＂ case,the main phase is α;there are remarkable phase β＇ and a little of phase γ2 and K.The results show that,the microstructure of ＂first aluminum then copper＂ is finer than that of ＂first copper then aluminum＂ sequence.In addition,relatively high hardened phase γ2 and phase K uniformly distribute in the matrix for the sequence of ＂first aluminum then copper＂ case,which can play an effective role in enhancing the strength of the material.

关 键 词：铝青铜 微观组织 加料顺序 力学性能 

分 类 号：TG291[金属学及工艺—铸造]