摘要
首先采用差热分析确定了Mg-6Gd-3Y-0.4Zr-2Zn镁合金的固相点和液相点,然后在610.5~642.5℃温度区间对其进行半固态搅拌,研究了半固态搅拌对其显微组织的影响,并与未经半固态搅拌制备相同成分镁合金的组织进行了对比。结果表明:半固态搅拌处理镁合金的铸态组织相对未半固态搅拌处理的而言,晶粒尺寸有所减小,且较圆整均匀,第二相的连续网状结构有向断网状转变的趋势。
Liquidus and solidus temperature of Mg-6Gd-3Y-0.4Zr-2Zn magnesium alloy were determined by means of differential thermal analysis,and semi-solid stirring was carried out at 610.5-642.5 ℃.The effect of semi-solid stirring on microstructure of the magnesium alloy was studied,and compared with the microstructure of the magnesium alloy without semi-solid stirring.The results show that,comparing with the microstructure of the magnesium alloy without semi-solid stirring,the grain size of the alloy with semi-solid stirring gets refined and spheroidized,meanwhile,the continuous network structure of second phases had a tendency to discontinuousness.
出处
《机械工程材料》
CAS
CSCD
北大核心
2014年第5期17-20,共4页
Materials For Mechanical Engineering
基金
国家"973"重点基础研究项目(2013CB632200)
关键词
差热分析
半固态搅拌
镁合金
显微组织
differential thermal analysis
semi-solid stirring
magnesium alloy
microstructure
