... 关键字： 锌基合金；挤压型材；切削性能；抗拉强度；显微组织；腐蚀[gap=1153]Key words: zinc-based alloy; extruded profile; cutting performance; tensile strength; microstructure; corrosion..
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On the basis of the analysis of the character of aluminum alloy profile for subway and its producing difficulty, structure design and various technical parameter of extruded die were detailed.
在分析了地铁车辆用铝合金型材的特点及其生产难度的基础上，对挤压模具的结构设计和各项技术参数的确定做了详细说明。
All kinds of reasons of extruded die cracked is analysised when profile is hot extruded, and take the method of preventing and remedying.
分析了异型材热挤压时造成挤压模具开裂失效的各种原因，并提出了预防和补救措施。
To receive extruded product with high quality, it is necessary to know the arrangement of the velocity profile at the outlet of die.
为了获得高质量的挤压制品，对模具出口区域速度分布的研究是必须的。
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