Production method for corrosion-resistant steel rail for high-speed railway
A technology for high-speed railways and production methods, which can be applied to rails, rails, roads, etc., can solve the problem of high toughness and plasticity, achieve strong corrosion resistance, reduce the depth of decarburization layer, and improve corrosion resistance.
Inactive Publication Date: 2018-03-06
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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Problems solved by technology
[0004] In addition, due to the light weight of high-speed trains and their high running speed, the steel rails for high-speed railways are required to be supplied in the U71Mn hot-rolled state with reduced strength.
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Embodiment 1
[0017] The rail steel of following chemical composition of present embodiment is produced
[0018] Chemical composition of rail / %
[0019]
[0020] The comparative example in this embodiment adopts the same chemical composition, heating, rolling and on-line heat treatment as in Example 1.
[0021] The method in the claims is used to process the billets with different thicknesses of titanium materials, wherein 1# to 5# are different thicknesses of titanium materials, and 6# is the comparative example without plasma titanium plate welding treatment. Subsequently, 6 samples were produced by the same heating, rolling and on-line heat treatment process.
[0022] See the table below for details
[0023] Carburization thickness of steel billet in embodiment and comparative example
[0024]
[0025] According to the requirements of TB / T 2344-2012, six rail samples were tested for the decarburization depth of the rail head, and the test results are shown in the table below.
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Abstract
The invention relates to the field of production methods of steel rails for high-speed railways, and particularly relates to a production method for a corrosion-resistant steel rail for a high-speed railway. According to the production method, an extremely thin corrosion-resistant layer is rolled and coats the surface of a steel billet by utilizing the excellent corrosion resistance of titanium materials so as to improve the corrosion resistance of the surface of the steel rail. The production method comprises the following steps that a, the steel of the steel rail is produced by adopting a casting process of low-sulfur-in-furnace molten iron, high-alkalinity refining slag and whole-process protection; b, in the heating process of LF, a foaming agent is used, and the casting is protected in the whole process; c, a titanium plate is welded on the surface layer of the steel billet by adopting a vacuum electron beam welding box; and d, rolling is carried out by utilizing a universal wiremill. By optimizing and improving the production process, the steel for the steel rail which has no corrosion resistance originally has strong corrosion resistance, finally, the layer of thin titaniummaterial is formed on the surface of the steel rail for preventing the corrosion, so that the corrosion resistance of the surface layer of the steel rail is improved, and the depth of the decarburized layer of the steel rail is reduced. The production method is particularly suitable for the production of the steel rail for the high-speed railway which has relatively high requirement on the corrosion resistance.
Description
technical field [0001] The invention relates to the field of steel rail production methods for high-speed railways, in particular to a production method for corrosion-resistant high-speed railway steel rails. Background technique [0002] With the development of high-speed rail at home and abroad, the construction of high-speed rail and the maintenance of high-speed rail lines put forward higher requirements for the internal and surface quality of rails. Steel rails used in high-speed railways are used in tunnels or coastal environments. Rail corrosion has become a more prominent problem, and it has also become the main cause of rail damage. Due to the safety and economy of rail use, it is impossible to add too many anti-corrosion alloy elements, and only carbon or micro-alloy rails can be used for production and supply, and the rail matrix cannot be used for effective anti-corrosion. At present, rail manufacturers at home and abroad mainly spray anti-corrosion agents on th...
Claims
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IPC IPC(8): B23P15/00B23K15/06C22C38/02C22C38/04C22C38/12C22C38/18C22C38/24C22C38/26E01B5/00
Inventor 袁俊郭华邹明陈崇木
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP