锻压技术

焊缝对ZK60镁合金方管分流挤压成形的影响

英文标题：Influence of welding line on magnesium alloy ZK60 square tube in shunt extrusion

作者：马俊梁胜龙

单位：苏州工业职业技术学院

关键词：ZK60镁合金焊缝分流挤压 Deform-3D

分类号：

出版年,卷(期):页码：2016,41(7):46-50

摘要：

分流挤压型材的焊缝质量是影响型材综合性能的关键因素。基于有限元法可以获取挤压过程中坯料温度、应力应变、焊合压力等生产现场难以测量的物理参数的优势，针对不同焊合位置对某规格ZK60镁合金方管分流挤压过程的影响规律进行了有限元仿真分析和实验研究。研究发现：焊缝位于边中间可有效降低载荷约8%，型材挤压更省力；焊缝位于直角处可分别提升9.7%的焊合压力和约6~15 ℃的焊合温度，有助于细化金属晶粒和提高ZK60镁合金方管的焊缝质量和型材整体的力学性能。实验研究和模拟结果吻合良好。

Welding line quality of shunt extrusion profiles is a key factor influencing the combination properties of the profile. The parameters such as billet temperature, stress and strain，welding stress, and welding pressure that are impossible to be measured onsite can be obtained by finite element method. Therefore, the influences of welding line position on a special magnesium alloy ZK60 square tube in porthole extrusion were studied by FEM numerical analysis and experiment. The research shows that the loading decreases about 8% when the welding line locates in the middle of the side, which is benefit for profile extrusion. However, the welding pressure and the welding temperature increase by 9.7% and about 6-15 ℃ respectively when the welding line locates in the corner position, which is advantageous to refine material grain size and improves the welding quality and material mechanics performance of magnesium alloy ZK60 square tube. Furthermore, the experiment results are in good agreement with simulation results.

基金项目：

江苏高校品牌专业建设工程资助项目（PPZY2015 B186）

马俊（1973-），男，硕士，副教授

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