Hot Forged Tie Plate for Railroad
AssigneeYangtze Railroad Materials
InventorsPatrick Young, Zheng Gu
Life of this patent
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Abstract
A railroad tie plate has a generally prismatic body including a field side flange and a gauge side flange connected by an intermediate portion. The intermediate portion includes a rail seat for positioning a railroad rail. At least one of the flanges includes a protrusion extending in a thickness dimension of the tie plate. A hole extends into the at least one protrusion so as to receive a retaining device, such as an e-clip. The tie plate is made by hot forging, having a microstructure comprising pearlite and alpha-ferrite. The net shape of the tie plate may be achieved by forging without subsequent material addition and without subsequent material removal.
Claims28
A method of forming a railroad tie plate, the method comprising:
- providing a steel blank of predetermined dimensions and heated to a temperature within a predetermined temperature range from 1035° C. to 1065° C.;
- positioning the metal blank between opposing dies;
- bringing the opposing dies into proximity with the metal blank;
- deforming the metal blank into a net shape of a railroad tie plate by applying pressure to the opposing dies.
Dependencies are inferred from the claim text.