Rheo-Extrusion of AZ91D
Rheo-Extrusion of AZ91D
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DOI：
10.4028/www.scientific.net/ssp.192-193.470
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发表时间：
2012-10
期刊：
影响因子：
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通讯作者：
M. Xia;Yan Huang;Z. Cassinath;Z. Fan
中科院分区：
文献类型：
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作者：
M. Xia;Yan Huang;Z. Cassinath;Z. Fan
以异向旋转双螺杆挤出机为研究对象，采用理论分析与实验验证相结合的方法，对新型流变挤出过程进行了研究。通过对挤压过程中料浆粘度变化规律和系统热交换的研究表明，挤压温度和挤压速度都会影响料浆的温度和粘度。因此，根据分析，通过设置适当的工艺参数，可以建立连续的质量流，以防止在挤出过程中的桥接现象。经过研究，在挤出机的最高挤出速度下设置了连续输出的热策略。通过流变挤压AZ91D镁合金棒材，验证了该工艺和热处理策略的可行性。
The process of a novel rheo-extrusion was investigated by the combination of theoretical analysis and experimental verification based on a prototype counter rotating twin screw extruder. The investigation on the viscosity variation of AZ91D slurry and heat exchange of the system during extrusion shows both extrusion temperature and speed can affect the temperature and viscosity of the slurry. Thus, a continuous mass flow can be established by setting proper processing parameters to prevent bridging phenomenon in the extrusion according to the analysis. A thermal strategy for continuous output was setup at the highest extrusion speed of the extruder after investigation. The feasibility of the process and thermal strategy was then demonstrated by extruding an AZ91D rod using rheo-extrusion method.