Railway Thermit Welding

Railway thermit welding, also known as aluminothermic welding, is a method of joining two railway tracks together using a chemical reaction to produce intense heat that melts the ends of the tracks and fuses them together. This method is commonly used in the construction, maintenance, and repair of railway tracks.

The principle of railway thermit welding involves an exothermic reaction between aluminium powder and iron oxide to produce temperatures of up to 2,500°C. This reaction occurs inside a crucible that contains the powdered aluminium and iron oxide mixture, which is known as the thermit mixture. When ignited, the reaction produces a pool of molten steel that flows into a mould placed between the two ends of the rails to be joined.

The process involves several steps. First, the rail ends are prepared by cutting and grinding them to create a clean, smooth surface. The rails are then aligned and clamped in place, with the mould positioned between them. The thermit mixture is ignited using a spark or fuse, which initiates the exothermic reaction. The molten steel produced by the reaction then flows into the mould, where it cools and solidifies to form a strong, continuous weld between the two rails.

One of the main advantages of railway thermit welding is that it produces a high-quality, durable, and long-lasting weld that can withstand heavy loads and stresses. It is also a relatively quick and efficient process, which can be completed in a matter of minutes.

However, thermit welding requires specialized equipment and trained technicians to ensure that the process is carried out safely and effectively. The reaction can produce intense heat, sparks, and fumes, which can be dangerous if not managed properly. As a result, thermit welding is typically only carried out by professional contractors with the appropriate equipment and training.

Thermite Powder/Thermite Welding Powder

It is thermal welding supplies. A prepared package containing the correct quantity of Thermite Welding Powder for the type of weld to be made. Thermite powder is a pyrotechnic composition usually consisting of metal powder and metal oxide. Thermite welding powder is not usually explosive, but it does create extremely high temperatures in a very small area for a short period.

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Sand Mould for Thermit Welding

Thermite Welding Supplies: Sand Mould For Track, the primary material is SiO2(Silicon dioxide). It binds up the two ends of the rail and makes up an inner space to contain the liquid steel from the portion powder reaction.

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Luting Sand for Thermit Welding

Thermite Welding Supplies: Luting Sand Main material is SiO2(Silicon dioxide). It is used to seal the gap of the sand mold to avoid liquid steel leaking. 1770~2000℃ Refractory temperature, 3kg/weld.

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Crucible Lining for Thermit Welding

Magnesium oxide crucibles are Thermite welding supplies. Magnesium Oxide Crucible Lining are sintered in very high temperature, so it should be protected from any moisture at all time, otherwise it may cause failure when welding.

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One Shot Crucible for Thermit Welding

Thermite Welding Supplies: One Shot Crucible of inner crucible is MgO, outside is steel plate barrel. It is used as the reacting container of portion powder.

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Rail Shearing Machine

Rail Shearing Machine is a mechanical device that is used to cut and remove the excess or unwanted part of the rails after Thermit Welding.

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Rail Grinding Machine

Rail Grinding Machine is a type of equipment used in rail welding. It is used for profile grinding on the rail welding and rail damage maintenance, the grinding surface is smooth and clean and also keeps the original rail head profile size. Applicable to all types of rail laying scenes and repairing welding jobs.

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Rail Cutting Machine

It is a railway track maintenance equipment, it is not only cutting rail fast, high quality, and low wear. It relies on the rail clamped tightly locking. It is suitable for railway maintenance and repair, broken rail repair, and welding cutting in long rail.

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