摘要
通过在Cu-Zn-Al中添加Fe元素,采用熔铸和轧制法,制备了一种新型铜基弹性合金材料。采用X射线衍射分析仪(XRD)、扫描电镜(SEM)和光学显微镜(OM)对该合金的微观组织进行分析,并对其抗拉强度、屈服强度、伸长率、硬度和弹性模量进行了研究。结果表明:Fe的添加促进了合金中β相的生成;Fe在铸态组织中主要以球状富铁相存在,该组织在轧制过程中会被拉长,具有钉扎位错作用;随着Fe含量的增加,材料硬度、抗拉强度、屈服强度、伸长率和弹性模量都呈先升高后降低的变化趋势;当Fe添加量为1.5wt%时,合金的硬度、抗拉强度、屈服强度、伸长率和弹性模量分别达到262HV、983、854.9MPa、7.0%和105.4GPa;材料的主要强化机理为细晶强度、第二相强化和加工硬化。
A new elastic alloy was produced by adding Fe to Cu-Zn-Al aluminum brass via casting and rolling method. The microstructure of the alloy were investigated by XRD,SEM and OM.The tensile strength,yield strenth,hardness, elongation and elastic modulus were studied.The results show that the addition of Fe can promote the formation of β phase in the alloy.Fe can generate spherical intermetallic compound in as-cast microstructure.The intermetallic compound is elongated during the rolling and these phases can pin the dislocations.With the increase of Fe content,the hardness,tensile strength, yield strength,elongation and elastic modulus of the alloy first increase and then decrease.When the amount of Fe is 1.5wt%, the hardness,tensile strength,yield strength,elongation and elastic modulus reaches 262 HV,983 MPa,854.9 MPa,7.0% and 105.4 GPa,respectively.The main reinforcing mechanisms of the material are fine crystal strengthening,second phase strengthening and work hardening.
作者
廖若望
肖来荣
刘轩溱
刘溢
LIAO Ruowang;XIAO Lairong;LIU Xuanzhen;LIU Yi(School of Materials Science and Engineering,Central South University,Changsha 410083,China)
出处
《热加工工艺》
北大核心
2019年第16期75-79,共5页
Hot Working Technology
基金
广东省教育部产学研结合项目(2012A09030008)
