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Abstract：
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The thixo-co-extrusion of the double-layer tube with equal wall thickness was investigated with A356 and AZ91D by finite element software ABAQUS.Under different extrusion velocities,the temperature fields,metal flow fields and the contacting forces in X direction between the interfaces were studied systematically.It is found that the contacting force can decrease with the increasing extrusion velocity.If the velocity is a constant,the force in X direction between the interfaces can increase with the increasing of the magnesium proportion,and the contact force is strongly influenced by the contacting inner and outer billets.The results have provided an important theoretical basis for improving the quality of the double-layer tube.
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Funds：
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北京市自然科学基金资助项目(2072012);;
国家高技术研究发展计划(863)资助项目(2007AA03Z119);;
北京市自然科学基金资助项目(2102029)
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AuthorIntro：
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Reference：
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