摘要
通过金相组织分析和显微硬度测试,研究了不同均匀化温度和时间条件下铸态Mg-Gd-Y-Zr镁合金的显微组织和显微硬度值,分析了均匀化温度和时间对铸态合金组织变化和性能的影响。结果表明,均匀化工艺能有效消除铸造组织中沿晶界分布的大块金属间化合物,改善合金的热加工性能,在均匀化过程中温度起着主要作用。确定了铸态Mg-Gd-Y-Zr镁合金最佳的均匀化工艺为510℃×12h。
The microstructure and micro-hardness of Mg-Gd-Y-Zr magnesium alloy homogenized at different temperatures for different times were investigated by means of metallography analysis and micro-hardness measurement. The results indicate that the hot working performance of the magnesium alloy can be greatly improved as result of the elimination of bulk intermetallic compounds distributed along the grain boundary after homogenizing treatment after homogenizing treatment, in which the homogenizing process strictly depends on the temperature. The optimized microstructure and micro-hardness of as-cast magnesium alloy can be observed by homogenizing treatment at 510 ℃ for 12 h.
出处
《特种铸造及有色合金》
CAS
CSCD
北大核心
2007年第9期659-662,共4页
Special Casting & Nonferrous Alloys
关键词
MG-GD-Y-ZR镁合金
微区成分
均匀化
组织与性能
Mg-Gd-Y-Zr Magnesium Alloy, Micro-areas Chemical Composition, Homogenization, Microstructure and Properties
