مواد جوشکاری ترمیت ریلی

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.

آهن(سوم) 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 آهن + 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.

اتمام: 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:

استفاده از ریل	نوع ریل	استاندارد
راه آهن برای راه آهن	43 kg/m ریل, 50 kg/m ریل, 60 kg/m ریل, 75kg/m ریل, 60ان ریل, 75ان ریل	سل/تی۲۳۴۴-۲۰۱۲, TB/T3276-2011
	پی۵۰ ریل/ریل آر۵۰, پی۶۵ ریل/ریل آر۶۵, دانلود: RP60E1.000.000.000	گوست-آر۵۱۶۸۵, دانلود: GOST R51054-2014.pdf
	راه آهن اس۴۹, راه آهن UIC54, راه آهن UIC60	یو ای سی۸۶۰
	JIS50N راه آهن, JIS60 راه آهن	جی آی ای۱۱۰۱
	راه آهن AS50, راه آهن AS60, راه آهن AS68	AS1085, بی اچ پی RT STD
	90راه آهن RA, 100راه آهن RE, 115راه آهن RE, 132راه آهن RE, 136راه آهن RE	AREMA
	راه آهن TR45, راه آهن TR50, راه آهن TR57, راه آهن TR68	ASTM ای۷۵۹
	راه آهن BS75A, راه آهن BS90A, راه آهن BS100A	استاندارد BS11
	ایسکور 48 راه آهن, ایسکور 57 راه آهن	UIC860 استاندارد تولید
	45E1, 49راه آهن E1, 50راه آهن E2, 54راه آهن E1, 60راه آهن E1, 60راه آهن E2	EN 13674-1, دانلود: EN13674-4.pdf
سوئیچ ریل	50راه آهن AT1, 60راه آهن AT1, 60راه آهن AT2, 60راه آهن TY1	سل/تی۳۱۰۹-۲۰۱۳
کرین ریل	ای۴۵, ای۵۵, ای۶۵, ای۷۵, ای۱۰۰, ای۱۲۰, ای۱۵۰	DIN536
	راه آهن QU70/راه آهن KP70, راه آهن QU80/راه آهن KP80, راه آهن QU100/راه آهن KP100, QU120 راه آهن/راه آهن KP100, راه آهن CR175	YB/T5055-2014/GOST53866-2010 ASTM A759-2000
شیار ریل	59ریل R2, 60ریل R2	EN 14811:2006
ابزار ساخت و ساز راه اهن	دستگاه جوش فلش راه اهن متحرک, راه اهن فلش لب به لب دستگاه جوش

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