高强镁合金的纳米金属改性研究  

Nano metal modification research of high strength magnesium alloy

作　　者：郑菲[1,2] 项俊锋[3] 

机构地区：[1]成都理工大学地球物理学院,成都610059 [2]成都理工大学工程技术学院自动化工程系,四川乐山614007 [3]北京理工大学先进加工技术国防重点学科实验室,北京100081

出　　处：《功能材料》2015年第8期8108-8112,共5页Journal of Functional Materials

基　　金：高等学校博士学科点专项科研基金资助项目(20100191110008)

摘　　要：为提高高强镁合金的力学性能,在Mg-3Gd-2Zn-0.5Zr镁合金中添加了1.5%纳米Ti,对制备出的铸态镁合金试样进行了OM、SEM、XRD分析,并进行了力学性能、阻尼性能和耐磨损性能的测试与分析。结果表明,纳米金属钛的添加,显著提高了合金的力学性能、阻尼性能和耐磨损性能,使合金在6×10-5,20×10-5,40×10-5应变振幅下的阻尼性能分别提高54%,77%和81%;250℃磨损体积和摩擦因数分别减小68%,11%。借此为高强镁合金的纳米改性研究提供进一步指导与借鉴。In order to improve the high mechanical properties of automobile magnesium alloys,as-cast magnesium alloy specimens have been prepared by adding 1. 5% nano titanium into Mg-3Gd-2Zn-0. 5Zr magnesium alloy,of which the mechanical properties,damping properties and wear resistance analyses,and OM,SEM,XRD analysis,have carried on,respectively. The analysis results showed that the nano titanium addition can improve the alloy mechanical properties,and significantly improve the mechanical properties,damping performance and wear resistance properties of the alloy,of which damping performance under the strain amplitude of 6 × 10- 5,20 × 10- 5,40 × 10- 5increased by 54%,77% and 81%,respectively; the wear volume and friction factor at 250 ℃ decreased by 68% and 11% respectively.This provides further guidance and reference for nano modified studies of high strength magnesium alloy.

关 键 词：纳米钛 高强镁合金 Mg-3Gd-2Zn-0.5Zr-1.5纳米Ti 纳米改性 

分 类 号：TG249.2[金属学及工艺—铸造] TG178