THE RESEACH ON METAL FLOW DURING EXTRUDING PROCESS UNDER DIFFERENT FRICTION CONDITIONS BY DEFORMING AREA DIVISIO

Acta Metall Sin

2007, Vol. 43

Issue (2): 199-204 DOI:

Research Articles

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THE RESEACH ON METAL FLOW DURING EXTRUDING PROCESS UNDER DIFFERENT FRICTION CONDITIONS BY DEFORMING AREA DIVISIO

LI Feng

哈尔滨工业大学

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LI Feng. THE RESEACH ON METAL FLOW DURING EXTRUDING PROCESS UNDER DIFFERENT FRICTION CONDITIONS BY DEFORMING AREA DIVISIO. Acta Metall Sin, 2007, 43(2): 199-204 .

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Abstract In order to investigate the metal flow behavior during extrusion process with active friction, numerical simulations and experiments were employed to investigate the mechanical mechanism of the extrusion process with active friction. The characteristic quantity such as the second invariant of the deviatoric stress tensor (J2)、Lode parameter( ) were employed for the division of deformation area. The results show that when extruding with active friction, no metal flow interface forms at the container bottom, the dead metal zone completely disappears, the deformation type of the metal in the plastic deformation area changes from three to the tension type, and the homogeneity of the deformation as well as metal flow is greatly improved. Therefore, it will be easy for extruding and promoting the extrudates quality.

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Received: 05 June 2006

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https://www.ams.org.cn/EN/ OR https://www.ams.org.cn/EN/Y2007/V43/I2/199

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