An inline thermal treatment system for thermally treating a continuous product includes a housing comprising a first opening and second opening respectively configured to allow the continuous product to enter and to exit the housing. The system includes at least one laser coupled to a laser power source and configured to output at least one laser beam that impinges upon and heats the portion of the continuous product.

In a track part, in particular a low-alloy steel rail for rail vehicles, the steel comprises, in the rail head of the track part, a ferrite portion of 5-15 vol %, an austenite portion of 5-20 vol %, a martensite portion of 5-20 vol %, and a portion of carbide-free bainite of 55-75 vol %.

In a track part, in particular a low-alloy steel rail for rail vehicles, the steel comprises, in the rail head of the track part, a ferrite portion of 5-15 vol %, an austenite portion of 5-20 vol %, a martensite portion of 5-20 vol %, and a portion of carbide-free bainite of 55-75 vol %.

A post-heating treatment device performs a post-heating treatment for a welded section of a rail, after an induction heating coil is automatically disposed at a predetermined position based on the welded section. The device includes welded section detecting unit for detecting the position of a welded section on a rail, a first coil and a second coil that form an induction heating coil, first coil moving unit for moving the first coil to a position spaced apart from the rail at a predetermined distance, second coil moving unit for moving the second coil to a position separated from the rail at a predetermined distance, where the second coil is contacted to the first coil, clamping unit for pressing against the contact portion between the first coil and the second coil, and current applying unit for applying a predetermined current to the formed induction heating coil.

A post-heating treatment device performs a post-heating treatment for a welded section of a rail, after an induction heating coil is automatically disposed at a predetermined position based on the welded section. The device includes welded section detecting unit for detecting the position of a welded section on a rail, a first coil and a second coil that form an induction heating coil, first coil moving unit for moving the first coil to a position spaced apart from the rail at a predetermined distance, second coil moving unit for moving the second coil to a position separated from the rail at a predetermined distance, where the second coil is contacted to the first coil, clamping unit for pressing against the contact portion between the first coil and the second coil, and current applying unit for applying a predetermined current to the formed induction heating coil.

The rail having a chemical composition containing C: 0.70-0.85 mass %, Si: 0.50-1.60 mass %, Mn: 0.20-1.00 mass %, P: 0.035 mass % or less, S: 0.012 mass % or less, Cr: 0.40-1.30 mass %, the chemical composition satisfying the formula (1)

0.30[% Si]/10+[% Mn]/6+[% Cr]/30.55(1) where [% M] is the content in mass % of the element M,
the balance being Fe and inevitable impurities, where Vickers hardness of a region between positions where a depth from a surface of a rail head of 0.5 and 25 mm is 370 HV and <520 HV, a total area ratio of a pearlite microstructure and a bainite microstructure in the region is 98%, and an area ratio of the bainite microstructure in the region is >5% and <20%.

A track link for a ground-engaging track system includes an elongate link body having an upper rail surface located in part upon each of a first link strap, a second link strap, and a middle section of the track link. The upper rail surface is formed by a wear band of sacrificial wear material having a hardness that is varied lengthwise along the upper rail surface to retard scalloping of the track link during service and forming relatively softer zones in the first and second link straps and a relatively harder zone within the middle section. Methodology for making such a track link is also disclosed.

A track link for a ground-engaging track system includes an elongate link body having an upper rail surface located in part upon each of a first link strap, a second link strap, and a middle section of the track link. The upper rail surface is formed by a wear band of sacrificial wear material having a hardness that is varied lengthwise along the upper rail surface to retard scalloping of the track link during service and forming relatively softer zones in the first and second link straps and a relatively harder zone within the middle section. Methodology for making such a track link is also disclosed.

A steel for rail having the following elements, 0.25%C0.8%; 1.0%Mn2.0%; 1.40%Si2%; 0.01%Al1%; 0.8%Cr2%; 0P0.09%; 0S0.09%; 0%N0.09%; 0%Ni1%; 0%Mo0.5%; 0%V0.2%; 0%Nb 0.1%; 0%Ti0.1%; 0%Cu0.5%; 0%B0.008%; 0%Sn0.1%; 0% Ce0.1%; 0%Mg0.10%; 0%Zr0.10%; the remainder composition being composed of iron and unavoidable impurities caused by processing, the microstructure having, by area percentage, 2% to 10% of Proeutectoid Ferrite, the balance being made of Pearlite wherein the pearlite having interlamellar spacing from 100 nm to 250 nm .

A steel for rail having the following elements, 0.25%C0.8%; 1.0%Mn2.0%; 1.40%Si2%; 0.01%Al1%; 0.8%Cr2%; 0P0.09%; 0S0.09%; 0%N0.09%; 0%Ni1%; 0%Mo0.5%; 0%V0.2%; 0%Nb 0.1%; 0%Ti0.1%; 0%Cu0.5%; 0%B0.008%; 0%Sn0.1%; 0% Ce0.1%; 0%Mg0.10%; 0%Zr0.10%; the remainder composition being composed of iron and unavoidable impurities caused by processing, the microstructure having, by area percentage, 2% to 10% of Proeutectoid Ferrite, the balance being made of Pearlite wherein the pearlite having interlamellar spacing from 100 nm to 250 nm .