摘要
研究了不同含量的稀土Er(0%~5%,质量分数)对Mg-5Zn-3Sn-xEr系合金铸态组织和性能的影响。结果表明,稀土Er能有效细化该合金的铸态组织。随着Er含量的增加,溶质生长抑制因子GRF值从31.22增大到33.58,而二次枝晶臂间距从不含Er合金的23.8μm减小至Mg-5Zn-3Sn-5Er的9.7μm,减小了约59.24%,说明Er对该合金具有很好的细化晶粒的效果。Er含量为1.5%时,合金的极限抗拉强度(UTS)为208.36MPa,从断口形貌来看合金的断裂方式从准解理断裂向韧窝断裂转变。
The effects of different contents of rare earth Er(0%~5%,mass fraction)on as-cast microstructure and properties of Mg-5Zn-3Sn alloys were studied.The results show that rare earth Er can refine the as-cast structure of the alloy effectively.With the increase of Er content,the value of growth restriction factor(GRF)increases from 31.22 of Mg-5Zn-3Sn-0Er to 33.58 of Mg-5Zn-3Sn-5Er,while the secondary dendrite arm spacing decreases from 23.8μm of Mg-5Zn-3Sn alloy without Er to 9.7μm of Mg-5Zn-3Sn-5Er,decreasing by about 59.24%,indicating that Er has good grain refinement effect on this alloy.When the content of Er is 1.5%,the ultimate tensile strength(UTS)of the alloy is 208.36 MPa.In terms of fracture morphology,the fracture mode of the alloy is the primary dimple fracture.
作者
张昭
Zhang Zhao(He'nan Chuancheng Casting Material Co.,Ltd.,He'nan,455000)
出处
《当代化工研究》
CAS
2023年第20期51-53,共3页
Modern Chemical Research
基金
安阳市重大科技项目“铸态高强韧球铁用超微Mg0复合球化系列变质剂开发项目”(项目编号:2022A02GX004)。
关键词
ER
镁合金
显微组织
力学性能
晶粒细化
Er
magnesium alloy
microstructure
properties
grain refinement
