Die-filling process during the thixoforming of a ZA27 alloy cylindrical rod

被引：2
作者：
Chen, TJ [1 ]
Hao, Y [1 ]
Li, YD [1 ]
机构：
[1] Lanzhou Univ Technol, State Key Lab Adv Non Ferrous Mat, Lanzhou 730050, Peoples R China
来源：
METALS AND MATERIALS INTERNATIONAL | 2005年 / 11卷 / 06期
关键词：
ZA27; alloy; thioxforming; semi-solid; microstructure; die-filling;
D O I：
10.1007/BF03027502
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The die-filling process during thixoforming of a ZA27 alloy cylindrical rod was deduced by analyzing microstructural characteristics in the semi-solid ingot prior to and after forming, and by analyzing the phenomena occurring during this thixoforming. These characteristics referred to some constituent segregation such as a liquid-phase segregation and an inhomogeneous distribution of primary solid particles. The results indicated that the die-filling process could be properly deduced by using the method developed in this paper. The inhomogeneous distribution of primary solid particles in the formed rods mainly resulted from the inhomogeneous distribution in the semi-solid ingot. The detailed distribution was determined by the sequence of the die-filling. However, the aforementioned liquid segregation was mainly attributed to the die-filling process. The sequence of the die-filling process was from the bottom of the cylindrical cavity to the top and from the edge to the inner part of the cavity.
引用
收藏
页码：513 / 520
页数：8
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