Heat Treatment optimization and during transport deformation prevent of long forgings using Numerical simulation

Horsinka Jaromír - Vítkovice Heavy Machinery a.s. (Czech Republic)

Co-authors: Michal Sušovský, Radek Sztefek, Jiří Petržela, Vladimír László

The company of VÍTKOVICE Heavy Machinery a. s. (VHM) is a leader in the area of steel production, foundry, large products forging and heat treatment. The company has a long history and considerable experiences. In spite of this, many manufacturing processes can be optimized using modern techniques, in our case using the numerical modeling of heat treatment. During very long forgings – type bar – heat treatment is difficult to maintain the flatness over the total length. Deformations can occur during heating in the furnace and transport to the cooling place. The period when the bar remains in the furnace can be relatively reliably affect by the right underlay of the forgings. So the problem can be reduced to a period when the bar is pulled out of the furnace hearth and transported to the cooling place. Very long forgings which are during the transportation gripped only in few places are prone to issue of irreversible deformation. This paper aims to design such a system of heat treatment to prevent permanent shape changes on the bars during transport and at the same time to achieve the desired mechanical properties. To calculation the finite-element program SYSWELD will be used.

Keywords: SYSWELD, Heat Treatment, Long Forging

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