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US 4,230,488 AGranted
Abrasion resistant rails and/or rail wheels, and process for producing the same
AssigneeFried. Krupp Huttenwerke AG
InventorsWilhelm Heller, Walter Knoor, Reinhard Schweitzer
Life of this patent
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Abstract
Abrasion resistant rails or rail wheels formed from a steel alloy having between 0.02 to 0.35 percent by weight of lead or bismuth, and a process for the production of the same comprising alloying 0.02 to 0.35 percent by weight of lead or bismuth with a rail or rail wheel steel.
Claims12
In a unit composed of a railway rail and a railway wheel adapted to travel thereover, said rail and said wheel being formed from a steel for railways comprising in percent by weight no more than 0.80% carbon, no more than 1.50% silicon, no more than 3.50% manganese, no more than 4.00% chromium;
- with the total contents of manganese and chromium together not exceeding 4.50% and the remainder iron and other alloying elements used in steels for railway rails and railway wheels, the improvement comprising:
- adding an alloying material selected from the group consisting of lead and bismuth in an amount in the range of 0.02 percent to 0.35 percent by weight to the steel used for the railway rail or the railway wheel.
Dependencies are inferred from the claim text.