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Alloy atomic infiltration surface treatment method for elastic rail clip

A surface treatment, zinc-iron alloy technology, applied in the direction of metal material coating process, coating, solid-state diffusion coating, etc., can solve problems such as poor adhesion, loss of anti-corrosion ability of elastic strips, cracking of coating substrates, etc.

Inactive Publication Date: 2019-04-05
SHAANXI TIANYUAN MATERIALS PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Electrophoretic spray paint anti-corrosion coating has poor adhesion to the substrate. After long-term use or under impact, the coating is easy to crack with the substrate, resulting in the strip being exposed and losing its anti-corrosion ability

Method used

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  • Alloy atomic infiltration surface treatment method for elastic rail clip
  • Alloy atomic infiltration surface treatment method for elastic rail clip

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Embodiment

[0051] A specific embodiment of the present invention is given below.

[0052] In this embodiment, the surface treatment is carried out for the elastic fasteners in the high-speed railway rail fastener system, which specifically includes the following processes:

[0053] (1) Use steel shot with a particle size of 0.3~0.8mm to blast the surface of the elastic bar for 15~20min;

[0054] (2) Put the shot blasted spring bars and a certain amount of zinc saturated compound into the heating drum of the heat treatment furnace; the zinc saturated compound consists of 72% zinc powder, 23% zinc oxide powder and 5% other auxiliary materials Composition, the other auxiliary materials include 1.5% titanium dioxide, 0.8% silicon dioxide, 1.2% calcium carbonate and 1.5% aluminum phosphate, and the added amount of zinc saturated compound is 1 / 60 of the weight of the elastic bar.

[0055] (3) Rotate the heating drum at a speed of 6rad / min, heat the part to 380~400°C, and keep it warm for 2 ho...

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Abstract

The invention provides an alloy atomic infiltration surface treatment method for an elastic rail clip. The method comprises the following steps that a zinc-iron alloy atomic infiltration coating withthe thickness of 30-80 microns is prepared on the surface of the elastic rail clip by adopting an alloy atomic infiltration method, surface polishing and post passivation treatment are conducted on the zinc-iron alloy atomic infiltration coating, wherein the zinc-iron alloy atomic infiltration coating uses an innovatively prepared zinc-saturated compound which mainly comprises zinc powder and zincoxide zinc powder, the compound and an elastic rail clip workpiece are loaded into a heating roller with the temperature of 350-410 DEG C, and metal atom diffusion permeation is used to form the zinc-iron alloy atomic infiltration coating. According to the method, aimed at the high-strength fastener elastic rail clip, the surface of the elastic rail clip is treated through innovative introductionof an alloy atomic infiltration technology, so that the processed elastic rail clip has excellent corrosion resistance and scratch resistance, the service life of the elastic rail clip under complexand severe working conditions of various environments is prolonged, and the railway operation safety is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of surface anticorrosion of high-strength fasteners, and in particular relates to an alloy atomic infiltration surface treatment method for railway clips. Background technique [0002] The elastic strip is one of the important parts of the rail fastening system of the high-speed railway. It mainly acts on the track through bending and twisting deformation to generate buckle pressure to ensure that the rail does not produce vertical and horizontal displacement and the gauge is normal. Its quality and performance directly affect the buckle. Buckle pressure, fatigue life of the component system and driving safety of the line. The working conditions of railway fasteners are complex and harsh, such as industrial atmospheric acid rain environment, coastal humid environment, northwest wind and sand erosion, etc., accompanied by long-term mechanical vibration, wear, and stress impact, which often cause corrosion and...

Claims

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Application Information

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IPC IPC(8): C23C10/52C23C10/60
CPCC23C10/52C23C10/60
Inventor 田伟红李世亮朱宇轩张勉祁磊
Owner SHAANXI TIANYUAN MATERIALS PROTECTION TECH
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