An onsite steel rail laser processing engineering vehicle, including a laser processing power engineering vehicle and a laser processing cart, the laser processing power engineering vehicle is connected to the laser processing cart; the onsite steel rail laser processing engineering vehicle further comprises a transport mechanism disposed on the laser processing power engineering vehicle; through movement and rotation, the transport mechanism transports the laser processing cart into the laser processing power engineering vehicle or transports the laser processing cart out from the laser processing power engineering vehicle and places it on rails.

An onsite steel rail laser processing engineering vehicle, including a laser processing power engineering vehicle and a laser processing cart, the laser processing power engineering vehicle is connected to the laser processing cart; the onsite steel rail laser processing engineering vehicle further comprises a transport mechanism disposed on the laser processing power engineering vehicle; through movement and rotation, the transport mechanism transports the laser processing cart into the laser processing power engineering vehicle or transports the laser processing cart out from the laser processing power engineering vehicle and places it on rails.

A coated steel substrate including a coating including nanographite having a lateral size between 1 and 60 m and a binder, wherein the steel substrate has the following compositions in weight percent: 0.31C1.2%, 0.1Si1.7%, 0.7Mn3.0%, P0.01%, S0.1%, Cr0.5%, Ni0.5%, Mo0.1%, and on a purely optional basis, one or more elements such as Nb0.05%, B0.003%, Ti0.06%, Cu0.1%, Co0.1%, N0.01%, V0.05%, the remainder of the composition being made of iron and inevitable impurities resulting from the elaboration; and a method for the manufacture of the coated steel substrate.

A coated steel substrate including a coating including nanographite having a lateral size between 1 and 60 m and a binder, wherein the steel substrate has the following compositions in weight percent: 0.31C1.2%, 0.1Si1.7%, 0.7Mn3.0%, P0.01%, S0.1%, Cr0.5%, Ni0.5%, Mo0.1%, and on a purely optional basis, one or more elements such as Nb0.05%, B0.003%, Ti0.06%, Cu0.1%, Co0.1%, N0.01%, V0.05%, the remainder of the composition being made of iron and inevitable impurities resulting from the elaboration; and a method for the manufacture of the coated steel substrate.

A method for manufacturing a rail includes casting a steel to obtain a semi-product. The steel has a composition comprising 0.20%C0.60%, 1.0%Si2.0%, 0.60%Mn1.60% and 0.5Cr2.2%, optionally 0.01%Mo0.3%, 0.01%V0.30%; the remainder being Fe and impurities. The method also includes hot rolling the semi-product into a hot rolled semi-product having the shape of the rail and comprising a head, with a final rolling temperature T.sub.FRT higher than Ar3; and cooling the head to a cooling stop temperature T.sub.CS between 200 C. and 520 C. The temperature of the head over time is comprised between a upper boundary having the coordinates defined by A1 (0 second, 780 C.), B1 (50 seconds, 600 C.), and C1 (110 seconds, 520 C.) and a lower boundary having the coordinates defined by A2 (0 second, 675 C.), B2 (50 seconds, 510 C.), and C2 (110 seconds, 300 C.). The method also includes maintaining the head in a temperature range comprised between 300 C. and 520 C. during a holding time t.sub.hold of at least 12 minutes, and; cooling down the hot rolled semi-product to room temperature to obtain the rail.

A method for manufacturing a rail includes casting a steel to obtain a semi-product. The steel has a composition comprising 0.20%C0.60%, 1.0%Si2.0%, 0.60%Mn1.60% and 0.5Cr2.2%, optionally 0.01%Mo0.3%, 0.01%V0.30%; the remainder being Fe and impurities. The method also includes hot rolling the semi-product into a hot rolled semi-product having the shape of the rail and comprising a head, with a final rolling temperature T.sub.FRT higher than Ar3; and cooling the head to a cooling stop temperature T.sub.CS between 200 C. and 520 C. The temperature of the head over time is comprised between a upper boundary having the coordinates defined by A1 (0 second, 780 C.), B1 (50 seconds, 600 C.), and C1 (110 seconds, 520 C.) and a lower boundary having the coordinates defined by A2 (0 second, 675 C.), B2 (50 seconds, 510 C.), and C2 (110 seconds, 300 C.). The method also includes maintaining the head in a temperature range comprised between 300 C. and 520 C. during a holding time t.sub.hold of at least 12 minutes, and; cooling down the hot rolled semi-product to room temperature to obtain the rail.

A rail achieves a high 0.2% proof stress after straightening treatment, the high 0.2% proof stress being effective at improving rolling contact fatigue resistance of the rail, by hot rolling a steel raw material to obtain a rail, the steel raw material having a chemical composition containing C: 0.70% to 0.85%, Si: 0.1% to 1.5%, Mn: 0.4% to 1.5%, P: 0.035% or less, S: 0.010% or less, and Cr: 0.05% to 1.50% with the balance being Fe and inevitable impurities; straightening the rail with a load of 50 tf or more; and subsequently subjecting the rail to heat treatment in which the rail is held in a temperature range of 150 C. or more and 400 C. or less for 0.5 hours or more and 10 hours or less.

A rail achieves a high 0.2% proof stress after straightening treatment, the high 0.2% proof stress being effective at improving rolling contact fatigue resistance of the rail, by hot rolling a steel raw material to obtain a rail, the steel raw material having a chemical composition containing C: 0.70% to 0.85%, Si: 0.1% to 1.5%, Mn: 0.4% to 1.5%, P: 0.035% or less, S: 0.010% or less, and Cr: 0.05% to 1.50% with the balance being Fe and inevitable impurities; straightening the rail with a load of 50 tf or more; and subsequently subjecting the rail to heat treatment in which the rail is held in a temperature range of 150 C. or more and 400 C. or less for 0.5 hours or more and 10 hours or less.

To provide a railway wheel which is excellent in corrosion fatigue resistance. The railway wheel according to the present embodiment has a chemical composition consisting of: in mass %, C: 0.65 to 0.80%, Si: 0.10 to 1.0%, Mn: 0.10 to 1.0%, P: not more than 0.030%, S: not more than 0.030%, Cr: 0.05 to 0.20%, Sn: 0.005 to 0.50%, Al: 0.010 to 0.050%, N: 0.0020 to 0.015%, Cu: 0 to 0.20%, Ni: 0 to 0.20%, Mo: 0 to 0.20%, V: 0 to 0.20%, Nb: 0 to 0.030%, and Ti: 0 to 0.030%, with the balance being Fe and impurities. A plate portion has a matrix structure composed of pearlite.

Rolling support and guiding element (2) for a rail vehicle, comprising at least one upper portion forming the rolling surface, said portion being made from steel (1) having a composition comprising, in addition to Fe: 0.15C0.3%, 1Mn2%, 0.2%Ni1%, 0.5Cr2%, the steel (1) having a mixed structure of tempered martensite and residual austenite and bainite after having undergone a tempering heat treatment at a controlled speed and for a controlled length of time.