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Production method of corrosion-resistant steel rails

A production method and rail technology, applied in the direction of metal material coating process, etc., can solve the problems of rust pits, fractures, affecting the safety of line operation, etc., and achieve the effect of excellent corrosion resistance and good corrosion resistance.

Inactive Publication Date: 2019-01-11
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the use of rails, it is necessary to spray antifreeze on the coal truck, and after the antifreeze falls on the ballast bed, it will come into contact with the rails, which will easily form corrosion pits on the bottom of the rails, causing fractures and seriously affecting the safety of line operation

Method used

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  • Production method of corrosion-resistant steel rails
  • Production method of corrosion-resistant steel rails
  • Production method of corrosion-resistant steel rails

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0019] The following rail chemical compositions are selected for the embodiments and the corresponding comparative examples in this example.

[0020] Table 1 Example Rail Chemical Composition / %

[0021]

[0022] The comparative example in the present invention adopts the same chemical composition, heating, rolling and on-line heat treatment process as the embodiment.

[0023] Adopt the method in the claim to put the steel rail into the passivation solution, wherein 1# to 3# are different treatment times, and 4# is the comparative example without carburizing treatment. Subsequently, 4 samples were produced by the same heating, rolling and online heat treatment process.

[0024] Table 2 embodiment and comparative example rail pouring time

[0025]

[0026] Put the 4 rail samples into the salt spray test chamber, prevent them for 500h, and observe the surface quality, as shown in Table 3.

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Abstract

The invention relates to the field of corrosion-resistant steel rail production, in particular to a production method of corrosion-resistant steel rails with excellent corrosion resistance. The production method comprises the step that after the steel rails are cooled and straightened, the steel rails are placed in a groove containing a trivalent chromium passivation solution for corrosion-resistant material attachment, wherein the adhesion time of a corrosion-resistant material ranges from 1 min to 10 min. After the steel rails are cooled and straightened, the steel rails are placed in the groove containing the trivalent chromium passivation solution to adhere the corrosion-resistant material, so that the corrosion resistant material is adhered to the surface layer of the rail bottom of each steel rail, and good corrosion resistance is achieved. Due to the fact that the real trivalent chromium passivation solution is adopted for treatment, the obtained corrosion resistance is excellent. The production method is particularly suitable for railway transportation occasions in which an anti-freezing fluid needs to be sprayed.

Description

technical field [0001] The invention relates to the production field of corrosion-resistant steel rails, in particular to a production method of corrosion-resistant steel rails. Background technique [0002] With the development of domestic and foreign railways, railways are gradually developing towards high speed or heavy load. For heavy load rails, it is necessary for the rails to have the characteristics of excellent corrosion resistance. During the use of the rails, it is necessary to spray antifreeze on the coal truck, and after the antifreeze falls on the ballast bed, it will contact the rails, which will easily form corrosion pits on the bottom of the rails, causing fractures and seriously affecting the safety of line operation. Contents of the invention [0003] The technical problem to be solved by the invention is to provide a production method of a corrosion-resistant steel rail with excellent corrosion resistance. [0004] The technical scheme adopted by the p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/34
CPCC23C22/34
Inventor 袁俊韩振宇邹明李若曦
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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