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| 高精度AZ31镁合金薄壁管件等温挤压后的组织与性能 | |
| 引用本文： | 石磊,李继文,李永兵,魏世忠.高精度AZ31镁合金薄壁管件等温挤压后的组织与性能[J].热加工工艺,2009,38(20). |
| 作者姓名： | 石磊 李继文 李永兵 魏世忠 |
| 作者单位： | 1. 河南科技大学材料科学与工程学院,河南,洛阳,471003 2. 河南科技大学材料科学与工程学院,河南,洛阳,471003;河南科技大学河南省耐磨材料工程技术研究中心,河南洛阳,471003 3. 机械科学研究总院先进制造技术研究中心,北京,100083 |
| 摘 要： | 研究了不同条件下AZ3l镁合金管材的等温挤压情况,并对挤压前后材料组织与力学性能的变化进行了分析.研究结果表明,AZ31镁合金热挤压时发生了动态再结晶,材料组织比铸态时细化,力学性能大幅度提高;在(653±10)K挤压温度范围内金属流动均匀,挤出管材尺寸精度较高,力学性能良好;从综合性能看,AZ31镁合金挤压产品的合适退火工艺为573 K × 2 h;此时管材的机械拉伸强度为260 MPa,伸长率为23%. |
| 关 键 词： | AZ31镁合金 等温挤压 组织 性能 |
Microstructure and Mechanical Properties of Thin Wall AZ31 Magnesium Alloy Pipes with High Precision Prepared by Isothermal Extrusion Technology |
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| SHI Lei,LI Jiwen,LI Yongbing,WEI Shizhong.Microstructure and Mechanical Properties of Thin Wall AZ31 Magnesium Alloy Pipes with High Precision Prepared by Isothermal Extrusion Technology[J].Hot Working Technology,2009,38(20). | |
| Authors: | SHI Lei LI Jiwen LI Yongbing WEI Shizhong |
| Abstract: | AZ31 magnesium alloy was hot-extruded under different conditions, and the microstructure and mechanical properties of the alloy before and after hot extrusion were investigated. The results show that dynamic recrystallization occurs during hot-extrusion, therefore, compared to the as-cast alloy, the microstructure of extruded AZ31 alloy are refined, and the mechanical properties are remarkably enhanced; The AZ31 magnesium alloy extruded at (653±10)K can gain dimensions accuracy and good plasticity. In terms of comprehensive properties, the suitable annealing technics of AZ31 magnesium alloy is 573K×2 h. The tensile-strength of AZ31 magnesium alloy pipes is 260 MPa, its elongation is 23%. |
| Keywords: | AZ31 magnesium alloy isothermal extrusion microstructure properties |
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