锻压技术

挤压AZ31镁合金管材的组织性能及热塑性研究

英文标题：Microstructure and thermal plasticity of AZ31 magnesium alloy extruded tube

作者：杨树恒

分类号：TG376

出版年,卷(期):页码：2013,38(4):140-143

摘要：

分析了AZ31镁合金管材经过挤压变形后室温和高温的材料组织和力学性能变化,通过实验获得了镁合金挤压管材在室温下的相关力学性能指标，其屈服极限、拉伸强度、伸长率分别为190MPa，280MPa，17%；获得了在400℃高温条件下的相关力学性能指标，屈服极限和拉伸强度近似值为25MPa，伸长率为180%；分析了变形程度对镁合金管材挤压成形后机械性能的影响规律,随着变形程度的增大，各项性能指标随之增大。在此基础上确定了合适的挤压成形工艺参数。

The microstructure performance, mechanical behaviors and the subsequent changes of magnesium alloy AZ31 tube extrusion under high temperature and room temperature were studied. Under room temperature, for magnesium alloy tube, the yield intention, tensile intention and elongation ratio were respectively 190 MPa, 280 MPa and 17%. Under 400℃ high temperature, the yield intension and tensile intension are 25MPa approximately and elongation ratio is 180%. Through analyzing the law of influencing on mechanical behaviors of Mg tube by extrusion deformation, it is concluded that with the increasing of deformation, the mechanical behavior values of magnesium alloy also increase. In addition, the proper technical parameters of tube extrusion of magnesium alloy were determined.

基金项目：

杨树恒（1959-)，男，硕士，讲师

参考文献：

［1］Jin L, Lin D L, Mao D L. Microstructure and mechanical properties of AZ31 Mg alloy processed by two-step equal channel angular extrusion[J]. Journal of Shanghai Jiaotong University, 2005,39（11）: 1775-1778.
［2］Jin Li, Lin D L, Mao D L. Mechanical properties and microstructure of AZ31 Mg alloy processed by two-step equal channel angular extrusion[J]. Materials Letters, 2005,59(18): 2267-2270.
［3］Lin H K, Huang J C. High strain rate and/or low temperature super-plasticity in AZ31 Mg alloys processed by simple high-ratio extrusion methods[J]. Materials Transactions, 2002, 43(10):2424-2432.
［4］Lapovok R Y, Barnett M R. Construction of extrusion limit diagram for AZ31 magnesium alloy by FE simulation[J]. Journal of Materials Processing Technology, 2004, 146(3): 408-414.
［5］Choy C M, Lim S C V, Chan C F. Plane-strain backward extrusion of AZ31 magnesium alloy[J]. Materials Science Forum, 2003, 419-422(1):337-344.
［6］Li Y Y, Zhang D T, Chen W P. Microstructure evolution of AZ31 magnesium alloy during equal channel angular extrusion[J]. Journal of Materials Science, 2004, 39(11):3759-3761.
［7］Lin H K, Huang J C. High. strain rate and/or low temperature superplasticity in AZ31 Mg alloys processed by simple high-ratio extrusion methods[J]. Materials Transactions, 2002, 43(10):2424-2432.
［8］Bohlen J, Yi S B, Swiostek J. Microstructure and texture development during hydrostatic extrusion of magnesium alloy AZ31[J]. Scripta Materialia, 2005, 53(2):259-264.
［9］Osamu H, Manabe Ken-Ichi, Nishimura Hisashi. Deformation behavior of AZ31 magnesium alloy extruded tube under press bending at room temperature[J]. Journal of Japan Institute of Light Metals, 2002, 52(7):298-302.
［10］Huang C C. Basal-texture induced low formability during room temperature hydro-forming of fine-grained AZ31 Mg tubes[J]. Materials Transactions, 2004, 45(11): 3142-3149.
［11］Wang Y N, Lee C J. Influence from extrusion parameters on high strain rate and low temperature superplasticity of AZ series Mg-based alloys[J]. Materials Science Forum, 2003, 426-432(3): 2655-2660.
［12］Xiong F, Davies C H J. Anisotropy of tensile properties of extruded magnesium alloy AZ31[J]. Materials Science Forum, 2003, 426-432(4):3605-3610.
［13］Kobayashi T, Koike J, Yoshida Y. Grain size dependence of active slip systems in an AZ31 magnesium alloy[J]. Journal of the Japan Institute of Metals, 2003, 67(4):149-152.

服务与反馈：

【本网站尚未开通全文下载服务】【加入收藏】