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介绍了不同锻造工艺和热处理设备对ＬＤ２锻铝镦粗件的晶粒度的影响以及控制晶粒度的有效方法，并展望了细晶粒锻造工艺对锻件生产的重要意义。
The influence of different forging process and heat treatment equipment on the grain size of LD2 forging upsetting and the effective method of controlling the grain size are introduced. The importance of fine grain forging process to forging production is also prospected.