Rail thermite welding material

Rail thermite welding material also known as exothermic welding or aluminothermic welding, is a process that uses the intense heat generated from a chemical reaction to weld railroad tracks together. The material used in this process is a thermite composition, which typically includes:

Aluminum Powder: This is the fuel for the reaction. Aluminum is a highly reactive metal that, when finely powdered, reacts exothermically with metal oxides.

Dəmir(III) Oxide (Fe2O3): This serves as the oxidizer in the reaction. When combined with aluminum powder, it reacts to produce molten iron and aluminum oxide, along with a great deal of heat.

The basic chemical reaction in thermite welding is as follows:
[ Fe_2O_3 + 2 Al \rightarrow 2 Fe + Al_2O_3 + Heat ]
This reaction is known as a reduction-oxidation reaction (redox reaction) where aluminum reduces the iron oxide to iron, and in doing so, gets oxidized to aluminum oxide. The reaction is highly exothermic, meaning it releases a significant amount of heat, enough to melt the iron.
In the context of rail welding, the molten iron produced by the thermite reaction is what fuses the rail ends together. The process involves the following steps:

Preparation: The ends of the rails to be joined are cleaned and aligned. A mold, known as a crucible, is placed around the joint to contain the molten iron.

Ignition: The thermite mixture is placed in the crucible and ignited, usually with a flammable primer or a sparkler-like igniter.

Reaction: The thermite mixture reacts, producing molten iron which flows into the gap between the rail ends.

Solidification: The molten iron solidifies to form a solid weld, fusing the rail ends together.

Finishing: After cooling, excess material is removed, and the weld is ground down to ensure a smooth, continuous rail surface.

Thermite welding is often preferred for rail applications because it produces a high-quality weld that is strong and durable, capable of withstanding the heavy loads and stresses associated with rail traffic. It also has the advantage of being portable and relatively easy to perform in the field, which is essential for repairing and maintaining railway tracks.

We can make mould to weld below steel rails:

RELLERİN İSTİFADƏSİ	RELLERİN NÖVÜ	STANDART
Dəmir yolu üçün dəmir yolu	43 kq/m dəmir yolu, 50 kq/m dəmir yolu, 60 kq/m dəmir yolu, 75kq/m dəmir yolu, 60Taux de participation unique, 75Taux de participation unique	TB/T2344-2012, TB/T3276-2011
	P50 dəmir yolu/R50 dəmir yolu, P65 dəmir yolu/R65 dəmir yolu, RP60E1	GOST-R51685, GOST R51054-2014
	S49 dəmir yolu, UIC54 dəmir yolu, UIC60 dəmir yolu	UIC860
	JIS50N dəmir yolu, JIS60 dəmir yolu	JIS E1101
	AS50 dəmir yolu, AS60 dəmir yolu, AS68 dəmir yolu	AS1085, BHP RT STD
	90RA dəmir yolu, 100RE dəmir yolu, 115RE dəmir yolu, 132RE dəmir yolu, 136RE dəmir yolu	AREMA
	TR45 dəmir yolu, TR50 dəmir yolu, TR57 dəmir yolu, TR68 dəmir yolu	ASTM A759
	BS75A dəmir yolu, BS90A dəmir yolu, BS100A dəmir yolu	BS11 STANDART
	ISCOR 48 dəmir yolu, ISCOR 57 dəmir yolu	UIC860 produce standard
	45E1, 49E1 dəmir yolu, 50E2 dəmir yolu, 54E1 dəmir yolu, 60E1 dəmir yolu, 60E2 dəmir yolu	IN 13674-1, EN13674-4
Dəmir yolu dəyişdirin	50AT1 dəmir yolu, 60AT1 dəmir yolu, 60AT2 dəmir yolu, 60TY1 dəmir yolu	TB/T3109-2013
Kran Dəmiryolu	A45, A55, A65, A75, A100, A120, A150	DIN536
	QU70 dəmir yolu/KP70 dəmir yolu, QU80 dəmir yolu/KP80 dəmir yolu, QU100 dəmir yolu/KP100 dəmir yolu, QU120 dəmir yolu/KP100 dəmir yolu, CR175 dəmir yolu	YB/T5055-2014/GOST53866-2010 ASTM A759-2000
Yivli dəmir yolu	59R2 dəmir yolu, 60R2 dəmir yolu	IN 14811:2006
Railway construction tools	Movable rail flash welding machine, Rail flash butt welding machine

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