摘要
对轧制态Mg-Al-Zn系镁合金进行不同温度固溶处理,之后对其进行相同工艺的人工时效。通过金相显微分析、XRD物相分析以及极化腐蚀等试验分析了不同固溶温度对显微组织、物相种类以及耐腐蚀性的影响。分析结果表明:不同固溶温度条件下的Mg-Al-Zn系镁合金晶界处的细小晶粒数量、第二相组织及耐腐蚀性有较大不同,当固溶温度为400℃时,合金基体晶界处出现大量的细小晶粒,同时在晶内及晶间弥散分布着大量的第二相,且耐腐蚀程度最高,当固溶温度较低或者较高时,晶界处的细小晶粒较少,并且耐蚀性较差。
Solution treatment at different temperature and then the same artificial aging for the rolling Mg-Al-Zn magnesium alloy were carried out. Effects of solution temperature on microstructure,phase and corrosion resistance were analyzed by OM,XRD. The results show that the number of tiny grain around grain boundary and the second phase organization as well as corrosion resistance have great difference under the different solution temperature. When the solution temperature is 400 ℃,a large number of small grain appear and a larger number of the second phase distribute in the mtragranular and in the intergranular,at the same time,the corrosion resistance is best. When the solution temperature is lower or higher,the small grain size of grain boundary is less,and the corrosion resistance is poor.
出处
《热加工工艺》
CSCD
北大核心
2015年第18期221-223,共3页
Hot Working Technology
关键词
MG-AL-ZN
系镁合金
固溶温度
组织
耐腐蚀性
Mg-Al-Zn magnesium alloy
solution temperature
microstructure
corrosion resistance
