Скачать или смотреть Tantalum Slab Rolling Simulation

A DEFORM-3D simulation modeled a multi-pass flat rolling process that was used to reduce the thickness of a tantalum slab.


Product: DEFORM-3D

Summary:

The tantalum slab rolling simulation demonstrates the capabilities of DEFORM to efficiently model multi-pass rolling operations. The contours plotted on the surface of the slab indicate temperature. A multiple operation template provided the ability to set up all of the operations up-front, followed by automated sequential simulation of the operation chain.

Case Study:

A tantalum slab was reduced from 4” to 2” thickness by eight passes in an industrial rolling process simulation. The initial slab had been cogged from round ingot. The predicted deformation history from the cogging operation was carried through to the rolling operation. Rolling began with the slab at room temperature but a non-isothermal analysis was performed to account for adiabatic heating. It was critical to capture adiabatic heating since it influenced a reduction in the alloy's flow stress.

The slab was rotated 90 degrees after each pass, resulting in alternating longitudinal and transverse passes. The preliminary simulations in DEFORM-3D correctly predicted the slight bending of the slab in the seventh pass. It also revealed the progressive evolution of a fold on the end of the slab during the eight passes.

The predicted load-stroke curve revealed that the experienced higher loads from the transverse passes. This was extremely valuable in determining whether greater reductions per pass would be feasible for a given rolling mill capacity. The increased rolling loads in subsequent passes were due to increases in slab length and width, since it was known that work hardening effects were cancelled by softening due to adiabatic heating.