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Frog, preparation method thereof and railway turnout

A frog and weld bead technology, used in tracks, roads, switches, etc., can solve the problems of no wheel-rail load transfer zone performance, difficult performance enhancement, improvement or optimization, etc. The performance of friction and wear, the effect of improving the online service life

Active Publication Date: 2021-07-16
CNR BEIJING RAIL EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the frog material alloy steel frog is mainly prepared by integral casting or forging assembly, it is not easy to do extra performance enhancement for the wheel-rail load transfer area where the local damage of the frog is frequent.
[0004] Although some frogs in the prior art have made some improvements for the serious damage of the wheel-rail load transfer area, such as changing the wing rail in this area to a bainite alloy steel with higher strength than pearlite by welding, but The other areas are still low-strength ordinary pearlitic steel rails, and compared with the whole forged or assembled bainitic frog, the economic efficiency is only improved, and there is no improvement or optimization in the performance of the wheel-rail load transfer area.

Method used

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  • Frog, preparation method thereof and railway turnout
  • Frog, preparation method thereof and railway turnout
  • Frog, preparation method thereof and railway turnout

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] This embodiment provides a kind of preparation method of frog, please refer to Figure 4 and Figure 5 , the space occupied by the additive area is reserved in the vertical direction of the original wing rail and the core rail, and the multi-layer structure is formed layer by layer on the substrate area through the additive manufacturing technology, and each layer structure is passed through the first welding wire Formed alternately with the second welding wire, the thickness of the multi-layer structure is controlled to 20mm, the rotation angle of two adjacent layers is roughly 20°, the bead width of the first welding wire is 1mm, and the bead width of the second welding wire is 3mm .

[0062] In terms of mass percentage, the chemical composition of the first welding wire is as follows: C 0.050%, Mo 1.50%, Si 0.50%, Ni 1.50%, Cr 0.5%, Mn 0.20%, Cu 0.10%, and the balance is Fe. In terms of mass percentage, the chemical composition of the second welding wire is as foll...

Embodiment 2

[0071] This embodiment provides a kind of preparation method of frog, please refer to Figure 4 and Figure 5 , the space occupied by the additive area is reserved in the vertical direction of the original wing rail and the core rail, and the multi-layer structure is formed layer by layer on the substrate area through the additive manufacturing technology, and each layer structure is passed through the first welding wire Formed alternately with the second welding wire, the thickness of the multi-layer structure is controlled to 50mm, the angle of rotation and staggering of two adjacent layers is roughly 90°, the bead width of the first welding wire is 1mm, and the bead width of the second welding wire is 2mm .

[0072] In terms of mass percentage, the chemical composition of the first welding wire is as follows: C 0.10%, Mo 3.50%, Si 1.00%, Ni 3.50%, Cr 1.00%, Mn 0.80%, Cu 0.50%, and the balance is Fe. In terms of mass percentage, the chemical composition of the second weldi...

Embodiment 3

[0081] This embodiment provides a kind of preparation method of frog, please refer to Figure 4 and Figure 5 , the space occupied by the additive area is reserved in the vertical direction of the original wing rail and the core rail, and the multi-layer structure is formed layer by layer on the substrate area through the additive manufacturing technology, and each layer structure is passed through the first welding wire Formed alternately with the second welding wire, the thickness of the multi-layer structure is controlled to 30mm, the angle of rotation and staggering of two adjacent layers is roughly 50°, the bead width of the first welding wire is 1mm, and the bead width of the second welding wire is 2mm .

[0082] In terms of mass percentage, the chemical composition of the first welding wire is as follows: C 0.10%, Mo 3.50%, Si 1.00%, Ni 3.50%, Cr 1.00%, Mn 0.80%, Cu 0.50%, and the balance is Fe. In terms of mass percentage, the chemical composition of the second weldi...

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Abstract

The invention discloses a frog, a preparation method thereof and a railway turnout, and relates to the technical field of rail transit. The frog comprises a point rail and two side rails located on the two sides of the point rail, the side rails are wing rails or inlaid blocks, each of the point rail and the side rails comprises a base and a multi-layer structure deposited on the base layer by layer, and each layer of structure is formed by alternately arranging first welding wires and second welding wires side by side; and the second welding wire (high-hardness wear-resistant welding wire) is used for supporting a framework, the friction resistance and the wear resistance are enhanced, and the first welding wire (high-toughness welding wire) is used for absorbing energy, buffering, toughening and resisting cracks. According to the frog, limitation of homogeneous materials is broken through, generation and extension of micro cracks in a frog wheel-rail load transfer area can be effectively hindered, stripping and chipping phenomena are inhibited, the damage probability is reduced, and therefore the online service life of the frog is prolonged.

Description

technical field [0001] The invention relates to the technical field of rail transit, in particular to a frog, a preparation method thereof and a railway turnout. Background technique [0002] The basic function of the railway turnout is to realize the crossing of the line, and the frog is the throat area of ​​the turnout section. When the wheel is switched between the center rail and the wing rail of the fixed frog, there is a discontinuity of load transfer in the wheel-rail load transfer area, and a high impact compression load will be generated at the contact interface between the wheel and the frog. High impact compressive loads lead to severe peeling off blocks and internal "nucleation (microcracks)" damage in frogs. Therefore, the service conditions in the frog area are very harsh, especially for heavy-duty lines, and damage to the wheel-rail load transfer area occurs frequently. [0003] The types of existing frogs can be divided into forged alloy steel core-rail com...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01B7/00E01B7/10E01B7/12B22F3/105B22F7/04B33Y10/00B33Y70/00B33Y80/00C22C38/02C22C38/04C22C38/42C22C38/44C22C38/22C22C38/28C22C38/26C22C38/32
CPCE01B7/00E01B7/10E01B7/12B22F7/04B33Y10/00B33Y70/00B33Y80/00C22C38/02C22C38/04C22C38/42C22C38/44C22C38/22C22C38/28C22C38/26C22C38/32C22C38/005E01B2202/00Y02P10/25
Inventor 李伟张立军张琦尉小明闫佳智学元
Owner CNR BEIJING RAIL EQUIP
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