Solidification structure
Thermite welding of railways rails

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Solidification structure
Thermite welding of railways rails

Author : Raymond DEROCHE

Review date: February 13, 2026 | Lire en français

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8. Solidification structure

The solidification structure is entirely basaltic dendritic (figure 7 ), which is not the ideal structure. This is due to the cooling flows imposed by the rail ends, despite oxypropane preheating to 700°C at the surface.

.Example of the basaltic structure of a thermite weld
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