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| Number | Title | Issue Date |
| 7115176 | Production process and production line for manufacturing articles from hardenable metal materials In a method of manufacturing articles (8) in hardenable metal materials, a shaped workpiece (5.1, 5.2) with closed cross-section is hardened. The hardened workpiece (5.1, 5.2) is separated into at least two parts, where each part constitutes one... | 10/03/2006 |
| 7004004 | Method of making a hardened motor-vehicle part of complex shape A hardened steel part of complex shape is made from a workpiece by first heating the workpiece to an annealing temperature. Then, while the workpiece is still at the annealing temperature, the workpiece is rapidly deformed by a machine into an intermediate shape. Th... | 02/28/2006 |
| 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 |
| 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 |
| 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 |
| 5419791 | Method of heat assisted sheet metal forming in 360 degree shapes This is a method for heat assisted forming, annealing, and hardening 360° sheet metal shapes in a clean environment in a single facility that results in dimensionally correct, cost-effective, contaminant free parts.... | 05/30/1995 |
| 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 |
| 4486248 | Method for the production of improved railway rails by accelerated cooling in line with the production rolling mill Railroad rails having improved wear resistance, are produced by controlled forced cooling from above the austenite transformation temperature, to produce rails having a fine pearlite metallurgical structure in the head portions of the rails. Apparatus com... | 12/04/1984 |
| 4282048 | Method for cooling hot-rolled shapes A walking beam section of a cooling bed receives hot lengths of rails or beams for cooling through a first temperature range. Beams are turned at the end of the walking-beam section and positioned into a layered collection after which the collection is tr... | 08/04/1981 |
| 4169745 | Method of joining frogs of wear-resisting manganese steel castings to rails of carbon steel A method of joining frogs consisting of wear-resisting austenitic manganese steel casting to rails of carbon steel by welding and with the aid of an interposed connector consisting of austenitic low-carbon steel, characterized in that the connector is fir... | 10/02/1979 |
| 4099996 | Process for heat-treating the head of railroad rail In the process of heat-treating the head of a railroad rail wherein the rail is stressed so that the head forms a convex arc of predetermined height, the arc height is decreased about 14% after about 10% of the rail head has been heated, and then the orig... | 07/11/1978 |
