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Method for manufacturing passenger dedicated line railway turnout sliding platen with high-speed laser cladding surface

A technology for laser cladding and passenger dedicated lines, which is applied in the direction of rails, roads, coatings, etc., can solve the problems of low cladding work efficiency, large waste of substrate materials and welding materials, rough coating surface, etc., to meet large-scale The effect of production needs, high cladding work efficiency, and small coating dilution rate

Pending Publication Date: 2020-11-20
李庆杰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The problems existing in the surface surfacing process are: large heat input, large deformation of the sliding platen substrate, high dilution rate of the welding material, thick surfacing coating, uneven surface of the coating, and the substrate material and welding material in the manufacturing process. Large waste, long follow-up processing time period, low production efficiency and high application cost
[0026] The problems of the surface laser cladding process are: the cladding coating is thin, the coating surface is rough, the cladding work efficiency is low, it cannot meet the needs of large-scale production, and the application cost is high

Method used

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  • Method for manufacturing passenger dedicated line railway turnout sliding platen with high-speed laser cladding surface

Examples

Experimental program
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Effect test

Embodiment 1

[0041] A method for manufacturing a general-purpose sliding bed and a roller sliding bed for high-speed laser cladding of a passenger-dedicated line railway turnout, the specific steps are as follows:

[0042] 1. The preparation and surface treatment of the base of the universal sliding bed and roller sliding bed:

[0043] The base body of the universal sliding table and the roller sliding table is prepared by casting or forging,

[0044] Use the sandblasting method to derust and degrease the base surface of the universal sliding bed and roller sliding bed,

[0045] 2. Requirements for chemical composition and appearance quality of Fe-based alloy powder:

[0046] Chemical composition mass percentage: Cr 13, Ni 20, Mo 1.0, Mn0.5, Si<3.5, B<2.5, C0.1-0.25, P≤0.045, S≤0.035, Fe balance.

[0047] Appearance quality: particle size 15μm, sphericity > 90%, fluidity < 20s / 50g.

[0048] 3. The cladding process is as follows:

[0049] Such as figure 1 As shown, the position of the ...

Embodiment 2

[0073] The difference between embodiment 2 and embodiment 1 only lies in the following:

[0074] Requirements for chemical composition and appearance quality of Fe-based alloy powder:

[0075] Chemical composition mass percentage: Cr 20, Ni 10, Mo 0.75, Mn1.0, Si<3.5, B<2.5, C0.1-0.25, P≤0.045, S≤0.035, Fe balance.

[0076] Appearance quality: particle size 50μm, sphericity > 90%, fluidity < 20s / 50g.

[0077] Final product performance: coating thickness: ≥1.21mm, surface hardness: HB≥350,

[0078] Surface corrosion resistance: NSS≥60h;

Embodiment 3

[0080] The difference between embodiment 3 and embodiment 1 only lies in the following:

[0081] Requirements for chemical composition and appearance quality of Fe-based alloy powder:

[0082] Chemical composition mass percentage: Cr 16, Ni 30, Mo 0.5, Mn0.75, Si<3.5, B<2.5, C0.1-0.25, P≤0.045, S≤0.035, Fe balance.

[0083] Appearance quality: particle size 30μm, sphericity > 90%, fluidity < 20s / 50g.

[0084] Final product performance: coating thickness is 1.2mm, surface hardness: 350-356HB,

[0085] Surface corrosion resistance: NSS≥60h.

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Abstract

The invention discloses a method for manufacturing a passenger dedicated line railway turnout sliding platen with a high-speed laser cladding surface. The method comprises the following steps of setting the focus point of a laser beam at 1.5-2.5mm above the upper surface of the platen, and transporting Fe-based alloy powder to the focus point; first heating the surface of the platen by the laser beam to form a molten pool; making the Fe-based alloy powder heated by the laser beam form a molten or semi-molten Fe-based alloy powder liquid and then drop into the molten pool, and then using the heat conduction effect of the platen for rapid cooling to form a metallurgical combination of the coating and the platen metal; and after subsequent processing, manufacturing a turnout sliding platen with rust and wear resistance on the surface. The method has the advantages of avoiding the defect that the melting state is not uniform and some parts cannot form a metallurgical bond with the coatingwhen laser cladding after the powder alloy is placed on the surface of the substrate surface of the platen, having high efficiency, small heat input and no deformation of the substrate, and being ableto meet the needs of large-scale production.

Description

technical field [0001] The invention relates to the technical field of manufacturing a sliding platform of a railway turnout on a passenger dedicated line, in particular to a method for manufacturing a sliding platform of a railway turnout on a passenger dedicated line with laser cladding on the surface. Background technique [0002] Sliding platform is a key component of railway turnouts for passenger dedicated lines. Its important role is to support the switch point rail and core rail, and the point rail and core rail slide on the surface to complete the turnout conversion. Because the railway turnout is in the open environment and the switch rails and core rails slide frequently during the switchover, resulting in corrosion and wear on the surface of the sliding platform, which involves the operation safety of the switchover equipment and high-speed trains. Therefore, the passenger-dedicated railway turnout requires that the contact surface of the sliding platform, the sw...

Claims

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Application Information

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IPC IPC(8): C23C24/10C22C38/54C22C38/44C22C38/34C22C38/04C22C38/02E01B7/00E01B7/02
CPCC23C24/106C22C38/54C22C38/44C22C38/34C22C38/04C22C38/02C22C38/002E01B7/00E01B7/02
Inventor 李庆杰马金钟
Owner 李庆杰
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