Numerical Simulation of GH4169 Alloy Section of Hot Roll Forming

Abstract

A hot roll forming process of GH4169 alloy complex sections described in this paper is a new forming process of GH4169 alloy sections. The rolling 6o, 7o, 8o pass and rectangular, wedge-shaped, irregular blank are designed. Rolling models has been developed using the rigid-plastic finite element method on DEFORM. The rolling force and pass fullness and the distribution of various field-variables such as temperature and effective strain can be obtained from the simulated result. The finally optimizing rolling process shows that the pass slopes with 6o on the roll, the cross-section of the blank is irregular, and the rolling processes are using one pass to do two passes rolling through changing the value of the roll gauge. The simulated results show the temperature of the workpiece is about 1030~1080°C, the inner temperature is greater than the surface temperature, the surface temperature is minimum, and the effective strain is about 0.3~2, which meet the requirement of the GH4169 alloy structure property, and they are significance to the other hot roll forming process of GH4169 alloy sections.