摘要
通过改变固溶时间和固溶后的处理工艺,观察和分析AZ91镁合金的显微组织和耐蚀性。结果表明:AZ91固溶5 h的耐蚀性较好,较基体腐蚀速度减慢26%;固溶6 h时显微组织最均匀;而固溶7 h时硬度最高(82.8HV),较基体(59.48HV)提高了22.32HV。固溶后淬火的试样耐蚀性比时效后有较大改善,而硬度几乎没有什么变化;经时效后的显微组织要比淬火时均匀,但硬度较固溶态有所下降。
M icrostructure and corrosion resistance of AZ91 magnesium alloy were observed and analyzed by changing the solid solution time and treatment process. The experimental results show that the AZ91 sample of keeping temperature for5 h has better corrosion resistance; sample of keeping temperature for 6 h has more homogeneous microstructure; sample of keeping temperature for 7 h has greater hardness（82.8 HV）, which improves 22.32 HV comparing with that of no treatment.The corrosion resistance of the test specimen after solide solution hardening has greater improvement cmparing with the that after aging and there is little change in hardness. The microstructure after aging is more homogeneous than that of quenching sample, but the hardness reduces of than that solid solution.
出处
《热加工工艺》
CSCD
北大核心
2015年第20期162-164,共3页
Hot Working Technology
基金
贵州省科学技术基金(黔科合J字【2012】2219号)
关键词
镁合金
热处理
显微组织
耐蚀性
magnesium alloy
heat treatment
microstructure
corrosion resistance
