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| Number | Title | Issue Date |
| RE42668 | Pearlitic steel rail having excellent wear resistance and method of producing the same This invention is directed to improve a wear resistance and a damage resistance required for a rail of a sharply curved zone of a heavy load railway, comprising more than 0.85 to 1.20% of C, 0.10 to 1.00% of Si, 0.40 to 1.50% of Mn and if necessary, at least one mem... | 09/06/2011 |
| RE42360 | Pearlitic steel rail having excellent wear resistance and method of producing the same This invention is directed to improve a wear resistance and a damage resistance required for a rail of a sharply curved zone of a heavy load railway, comprising more than 0.85 to 1.20% of C, 0.10 to 1.00% of Si, 0.40 to 1.50% of Mn and if necessary, at least one mem... | 05/17/2011 |
| RE41033 | Pearlitic steel rail having excellent wear resistance and method of producing the same This invention is directed to improve a wear resistance and a damage resistance required for a rail of a sharply curved zone of a heavy load railway, comprising more than 0.85 to 1.20% of C, 0.10 to 1.00% of Si, 0.40 to 1.50% of Mn and if necessary, at least one mem... | 12/08/2009 |
| 7416622 | Method and system for thermal treatment of rails In order to obtain a fine-lamellar perlite structure in the edge region of the heads of rails (1), especially hot-rolled rails for carriageways or railways, by specific thermal treatment during cooling from the rolling heat without the formation of bainite, p... | 08/26/2008 |
| 7374622 | Bainitic steel alloy The invention comprises a structural member formed from iron alloyed with 0.15% to 0.20% carbon, 1.00% to 1.80% manganese, 1.00% to 1.60% silicon, 1.50% to 2.50% chromium, 2.50% to 3.50% nickel, 0.40% to 0.70% molybdenum and 0.0025% to 0.0005% boron, all by weight. ... | 05/20/2008 |
| RE40263 | Pearlitic steel rail having excellent wear resistance and method of producing the same This invention is directed to improve a wear resistance and a damage resistance required for a rail of a sharply curved zone of a heavy load railway, comprising more than 0.85 to 1.20% of C, 0.10 to 1.00% of Si, 0.40 to 1.50% of Mn and if necessary, at least one mem... | 04/29/2008 |
| 7361015 | Clamp device and clamp method for heat-treated article A heat treatment operation can be executed, suppressing a wave-shaped deformation at a non heat-treatment region of an article to be heat treated. To an elongated-shaped article to be heat treated to which a raised portion extending in the longitudinal direct... | 04/22/2008 |
| 7288159 | High impact and wear resistant steel An improved steel railroad rail, and methods for producing same, having a high-carbon content in a range from more than 0.9 to 1.1 wt % is provided that has increased wear resistance and increased fracture toughness over conventional steel rail. The high-carbon rail... | 10/30/2007 |
| 7175376 | Method of cutting long-sized hardened steel material and cutting device The present invention mainly aims to provide cutting method and cutting apparatus for manufacturing a guide rail of a rolling guide device by efficiently cut-working a long scale hardened steel. In order to achieve such object, there is provided a cutting method of ... | 02/13/2007 |
| 7056596 | Method for coating a surface of a track component, in addition to a track component A method for coating a surface of a track component with a coating containing aluminum by means of an arc spraying process. In order to form a coating that exhibits a high resistance to sliding and abrasive wear, aluminum and silicon are applied to the surface in a ... | 06/06/2006 |
| 7032725 | Ultrasonic machining and reconfiguration of braking surfaces The novel methods, apparatus and reworked rotary braking surface product, for example those exhibited on interior cylindrical braking surfaces of a cast iron brake drum, serve to replace manufacturing defects exhibiting residual tensile stresses and outwardly direct... | 04/25/2006 |
| 6994635 | Peen conditioning of titanium metal wood golf club heads A golf club head is provided with a residual compressive stress layer on the inside surface of the club face using a peening treatment. The peening treatment also may remove material from the club head, such as unwanted alpha case on a titanium club head. The body o... | 02/07/2006 |
| 6770155 | Method for heat-treating profiled rolling stock A process for the manufacture of a railroad rail of a steel alloy having a pearlitic microstructure. The rail is is shaped at a reduction rate of 1.8 to 8% and aligned straight in its longitudinal direction at a temperature between 770° C. and 1050° C., whereafter... | 08/03/2004 |
| 6689230 | Method and apparatus for cooling hot-rolled sections A method of cooling on a cooling bed hot-rolled steel sections from rolling heat, wherein the sections, particularly rails, have section parts of different masses arranged at a distance from each other over the cross-section of the section, and an apparat... | 02/10/2004 |
| 6547897 | Procedure for the thermal treatment of rails A method for the thermal treatment of rails, in particular of the rail head, in which cooling is carried out in a cooling agent that contains a synthetic cooling agent additive starting at temperatures above 720° C. The treatment is carried out by immers... | 04/15/2003 |
| 6432230 | Process and device for hardening a rail Process and device for hardening a rail. The process for hardening a rail or part thereof by transforming it from an austenitic structure into a different microstructure that is stable at room temperature comprises aligning, horizontally positioning, and ... | 08/13/2002 |
| 6419762 | Heat-treated profiled rolling stock A railroad rail of a steel alloy having a pearlitic microstructure, which rail has a good long-term serviceability, high ductility and high abrasion resistance of the working surface at the rail head, the rail being formed of a steel alloy having a chemic... | 07/16/2002 |
| 6361625 | High-strength, damage-resistant rail having hardness distribution of excellent damage-resistance at its head top portion A high-strength, high damage-resistant rail made of 0.6 to 0.85 wt % C, 0.1 to 1.0 wt % Si, 0.5 to 1.5 wt % Mn, 0.035 wt % or less P, 0.040 wt % or less S, and 0.05 wt % or less Al, with the balance being Fe and inevitable impurities, and having corner an... | 03/26/2002 |
| 6315844 | Method for producing high-strength track element and track element thus obtained The invention relates to a high-strength steel track element, and process of making the steel track element by rolling and heat treating. The steel comprises: 0.3-0.6% C, 0.8-1.5% Si, 0.7-1.0% Mn, 0.9-1.4% Cr, 0.6-1.0% Mo, balance iron and smelting-relate... | 11/13/2001 |
| 6224694 | Method for heat-treating profiled rolling stock Method for heat-treating profiled rolling stock, including track and railroad rails, having a profiled surface and increased heat removal from portions of the profiled surface during cooling in the gamma range of an iron based alloy material. The method i... | 05/01/2001 |
| 6086685 | Profiled rolling stock and method for manufacturing the same A profiled rolling stock, in particular a running rail or railroad track made of an iron-based alloy, is provided. The alloy contains silicon plus aluminum below 0.99 wt. % of the rolling stock. A structure in the cross section is formed, at least partial... | 07/11/2000 |
| 5916387 | Method of reducing the gaping values in the web saw cut test on steel railway tracks This invention concerns a method of reducing the gaping values of railway tracks made of steel to less than 3.6 mm. It is characteristic of this invention that the rolled and leveled rails are heated briefly, i.e., for approx. 10 to 25 sec, until reaching... | 06/29/1999 |
| 5916380 | Fe-Ni alloy for parts of electron-gun and blanked parts for electron-gun An Fe--Ni alloy for use as a part 10 of an electron-gun 4 is press-blanked by a punch to form minute apertures 10a, 10b, 10c for passing an electron beam 3. The burrs 10 formed around the minute apertures 10a, 10b, 10c are detrimental to such part 4. The ... | 06/29/1999 |
| 5879474 | Relating to carbide-free bainitic steels and method of producing such steels A method of producing a wear and rolling contact fatigue resistant bainitic steel product whose microstructure is essentially carbide-free. The method comprises the steps of hot rolling a steel whose composition by weight includes from 0.05 to 0.50% carbo... | 03/09/1999 |
| 5830286 | Steel rail having excellent wear resistance and internal breakage resistance, and method of producing the same This invention provides a steel rail having wear resistance and internal breakage resistance required for a heavy load railway, containing, in terms of percent by weight, more than 0.85 to 1.20% of C, 0.10 to 1.00% of Si, 0.40 to 1.50% of Mn, 0.0005 to 0.... | 11/03/1998 |
| 5820702 | Welded nose rail used for crossing A nose type rail member for crossing member applied to a turnout or wayside switch system on the ground for a train and the like, is made of high carbon steel material containing 0.70 to 0.82 wt. % of carbon. The rail member is constructed by a pair of ra... | 10/13/1998 |
| 5762723 | Pearlitic steel rail having excellent wear resistance and method of producing the same This invention is directed to improve a wear resistance and a damage resistance required for a rail of a sharply curved zone of a heavy load railway, comprising more than 0.85 to 1.20% of C, 0.10 to 1.00% of Si, 0.40 to 1.50% of Mn and if necessary, at le... | 06/09/1998 |
| 5714020 | Process for heat treatment of a steel rail A process for the heat treatment of a steel rail having a head, a web and a flange. The rail is preheated, overheated and cooled. The process applies to steel in general, as well.... | 02/03/1998 |
| 5667603 | Hardening process and apparatus for holed flat parts A process for hardening a plurality of holed flat parts. The holed flat parts are heated by inserting a cantilever hanger into the holes of the holed flat parts to support them in vertical positions within a furnace. The holed flat parts are then removed ... | 09/16/1997 |
| 5486245 | Method for raising welded rail connections lying below the traveling surface on railroad tracks Method for raising rail joint welds lying below the traveling surface on railroad tracks by heating the weld by means of an aluminothermic mixture which solidifies after reacting, wherein a) the aluminothermic mixture (21) is used in an amount measured in... | 01/23/1996 |
| 5482576 | Railway-track elements and method of manufacturing them A railway-track element is disclosed not only for normal track but also for rail points. The track element is formed of vacuum-treated steel containing at least 0.53 to 0.62% C, 0.65 to 1.1% Mn, 0.8 to 1.3% Cr, 0.05 to 0.11% Mo, 0.05 to 0.11% V and ࣘ0.0... | 01/09/1996 |
| 5352305 | Prestressed brake drum or rotor Uniformly distributed compressive stresses are induced in the machined surfaces of brake drums and brake rotors. The compressive stresses cancel residual tensile stresses induced in the surfaces by machining operations during fabrication. Cancellation of ... | 10/04/1994 |
| 5342457 | Method for the production of a switch diamond In a method for the production of a switch diamond for switch rails and double crossovers with a switch diamond point out of carbon steel and connector rails, the switch diamond point is rolled and submitted to heat treatment, by which the switch diamond ... | 08/30/1994 |
| 5250126 | Method for manufacturing a rail for use in a linear motion rolling contact guide unit A method for manufacturing a rail for use in a linear motion rolling contact guide unit is provided. A rail intermediate product having a top surface, a pair of side surfaces, each formed with a guide groove portion, and a bottom surface is provided by dr... | 10/05/1993 |
| 5209792 | High-strength, damage-resistant rail A high-strength, damage-resistant rail characterized by essentially consists of 0.60 to 0.85 wt. % of C, 0.1 to 1.0 wt. % of Si, 0.5 to 1.5 wt. % of Mn, not more than 0.035 wt. % of P, not more than 0.040 wt. % of S, and not more than 0.05 wt. % of Al, a ... | 05/11/1993 |
| 5183519 | Method for quenching railway rail heads A method of air quenching a railway rail with an apparatus develops a pearlite microstructure in the head of the longitudinally travelling rail as it travels under the apparatus. A primary air chamber at a controlled pressure provides air to the top and s... | 02/02/1993 |
| 5000798 | Method for shape control of rail during accelerated cooling A method and apparatus for controlling the shape of a hot railroad rail during accelerated cooling of the rail head. The railroad rail is cooled along its web-base junction at a rate which achieves a pre-selected degree of shape control, while avoiding ov... | 03/19/1991 |
| 4950338 | Method for the controlled cooling of hot rolled steel samples A method for cooling samples of hot rolled steel sections. A programmable controller directs a predetermined sequence of air and cooling water sprays against the sample while held in a closed container. The controlled cooling of the sample prevents dimens... | 08/21/1990 |
| 4913747 | Method of and apparatus for heat-treating rails A method of heat-treating a rail for obtaining a variety of strength levels from medium value to high value. The method has the steps of: preparing a steel rail maintained at a high temperature region not lower than the austenite field, and disposing a no... | 04/03/1990 |
| 4886558 | Method for heat-treating steel rail head A method for heat-treating a steel rail head, which comprises: heating a steel rail head to the austenization temperature; then, cooling the rail head by means of a hot water jet until a surface temperature of the rail head decreases to a temperature not ... | 12/12/1989 |
