摘要
选用不同的挤压比对变形镁合金AZ80进行管材热挤压工艺试验研究,对挤压前后材料组织与力学性能的变化进行分析。结果表明,热挤压可以显著细化AZ80镁合金的晶粒,而且随着挤压比的增加,晶粒变得更加细小;增大挤压比也可以提高AZ80镁合金的抗拉强度和屈服强度。结果表明,挤压比为18.2,坯料温度为390℃,模具预热温度为360℃,凹模的半模角为60°～70°,可得到均匀的合金组织和良好的力学性能。
Effects of different squeezing ratios on microstructure and properties of AZ80 magnesium alloy in hot extruded process were investigated.The results reveal that the microstructure of the AZ80 alloy is effectively refined after hot-extrusion.The grains are refined increasingly and the tensile strength and yield strength of the AZ80 alloy extruded are obviously improved with increasing in extrusion ratio.The tubes with desirable microstructure and mechanical properties can be obtained by controlling the temperature of billet at 390 ℃ and mold preheating temperature at 360 ℃,half-die angle at 60°~70° as well as extrusion ratio of 18.2.
出处
《特种铸造及有色合金》
CAS
CSCD
北大核心
2012年第1期20-22,共3页
Special Casting & Nonferrous Alloys
基金
国家自然科学基金资助项目(50974037,50904018)
国家高技术研究发展计划(863计划)资助项目(2007CB613701
2007CB613702)
高等学校科技创新工程重大项目培育资金项目(704015)
新世纪人才资助项目(NCET-08-0098)
中央高校基本科研业务费资助项目(90409002
90209002)
关键词
挤压比
AZ80镁合金
组织与力学性能
管材
Extrusion Ratio
AZ80 Magnesium Alloy
Microstructures and Mechanical Properties
Tube
