将变形前后的图形输出 DRAW
对挤压变形前后的AZ91镁合金进行了微观组织和力学性能研究。
The microstructure and mechanical properties of AZ91 magnesium alloy before and after extrusion were investigated.
论文主要内容包括： 1、利用光学显微镜测试了试验钢变形前后的组织。
The primary coverage of the dissertation includes:(1) Light microscope is used to observe the microstructure.
对于缩口系数小、变形前后壁厚比较大的薄壁管件的缩口成形，一般需多道工序来完成。
The shrink shape for thin tube with little shrink rate and bigger thickness difference in the distortion generally demands more working procedures.
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