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| AZ31镁合金薄壁管材挤压技术研究 |
| Extrusion Process of AZ31 Magnesium Alloy Thin Tubes |
| Received:April 18, 2016 Revised:May 10, 2016 |
| DOI：10.3969/j.issn.1674-6457.2016.03.008 |
| 中文关键词: 热挤压 等温挤压 反向温度场挤压 晶粒组织 力学性能 |
| 英文关键词: hot extrusion isothermal extrusion un-thermal extrusion grain microstructure mechanical performance |
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| 中文摘要: |
| 目的 得到综合力学性能良好的AZ31镁合金Φ8 mm薄壁管材。方法 研究了热挤压、 等温挤压与反向温度场挤压3种工艺对AZ31镁合金薄壁管材晶粒组织和力学性能的影响。结果 热挤压管材组织不均匀， 头部晶粒粗大、 尾部细小， 等温挤压和反向温度场管材挤压组织较为均匀。结论 反向温度场挤压在模具温度为300 ℃、 坯料温度为20 ℃条件下， 薄壁管材抗拉强度达278MPa， 伸长率达20.1%， 综合力学性能最佳。 |
| 英文摘要: |
| In order to obtain AZ31 alloy thin tubes of Φ8 mm with good mechanical properties， that focused on the effect of grain microstructure and mechanical properties of the as-extruded thin tubes of AZ31 magnesium alloy by hot extrusion， and un-thermal extrusion. Studies have found that microstructure of hot extrusion is uneven， head grains were coarse， the tail grains were relatively small， and the others were well-proportioned. With comparison of The Three mechanical performance， it got the best tube tensile strength of about 278 MPa， elongation of about 20.1% ， when un-thermal extrusion is in the mold temperature of 300 ℃，billet temperature is 20 ℃. |
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