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Atmosphere corrosion resisting steel belt for railroad car and preparation method of atmosphere corrosion resisting steel belt

An atmospheric corrosion-resistant steel and atmospheric corrosion-resistant technology, which is applied in the field of atmospheric corrosion-resistant steel strips for railway carriages and their preparation, can solve problems such as easy rust and limit the service life of materials, and achieve extended service life, reduced dosage and stable performance. Effect

Inactive Publication Date: 2017-05-31
INNER MONGOLIA BAOTOU STEEL UNION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ordinary structural steel is very easy to rust when used in the atmosphere, which seriously limits the service life of the material

Method used

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  • Atmosphere corrosion resisting steel belt for railroad car and preparation method of atmosphere corrosion resisting steel belt
  • Atmosphere corrosion resisting steel belt for railroad car and preparation method of atmosphere corrosion resisting steel belt

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preparation example Construction

[0029] A method for preparing an atmospheric corrosion-resistant steel strip for a railway carriage, specifically comprising the following steps:

[0030] Step 1: Smelting, refining, continuous casting;

[0031] Desulfurization pretreatment is carried out on the molten iron, the molten iron is decarburized and dephosphorized by top-bottom combined blowing converter smelting to obtain molten steel, argon is blown throughout the converter smelting process, Cu plates and Ni plates are added to the converter along with scrap steel, and the tapping temperature of the converter is 1640-1680 °C. Then, the molten steel after converter smelting is refined outside the LF furnace, and the temperature in place of refining is ≥1560°C. The superheat degree of slab continuous casting is 15~30℃. After that, slab cleaning, slow cooling, and continuous casting slab quality inspection are carried out.

[0032] Step 2: Slab heating;

[0033] The slab is cold loaded into the furnace, the heatin...

Embodiment 1

[0040] Continuous casting slab preparation: desulfurization pretreatment of molten iron, decarburization and dephosphorization of molten iron by top-bottom double-blowing converter smelting to obtain molten steel, argon blowing throughout converter smelting, argon blowing throughout converter smelting, Cu plate and Ni plate are added to converter along with scrap steel , Converter tapping temperature 1640 ~ 1680 ℃. Then, the molten steel after converter smelting is refined outside the LF furnace, and the temperature in place of refining is ≥1560°C. The superheat degree of slab continuous casting is 15~30℃. After that, slab cleaning, slow cooling, and continuous casting slab quality inspection are carried out.

[0041] Continuous casting slabs to prepare atmospheric corrosion-resistant steel strips for railway carriages: the slab heating temperature is 1250° C., and the heating time is 60-120 minutes, and the heated slabs are subjected to high-pressure water dephosphorization....

Embodiment 2

[0046] Continuous casting slab preparation: desulfurization pretreatment of molten iron, decarburization and dephosphorization of molten iron by top-bottom double-blowing converter smelting to obtain molten steel, argon blowing throughout converter smelting, argon blowing throughout converter smelting, Cu plate and Ni plate are added to converter along with scrap steel , Converter tapping temperature 1640 ~ 1680 ℃. Then, the molten steel after converter smelting is refined outside the LF furnace, and the temperature in place of refining is ≥1560°C. The superheat degree of slab continuous casting is 15~30℃. After that, slab cleaning, slow cooling, and continuous casting slab quality inspection are carried out.

[0047] Continuous casting slabs to prepare atmospheric corrosion-resistant steel strips for railway carriages: the slab heating temperature is 1250° C., and the heating time is 60-120 minutes, and the heated slabs are subjected to high-pressure water dephosphorization....

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Abstract

The invention discloses an atmosphere corrosion resisting steel belt for a railroad car. The atmosphere corrosion resisting steel belt for the railroad car comprises, by mass, 0.05-0.07% of C, 0.15-0.25% of Si, 1.2-1.4% of Mn, no more than 0.015% of P, no more than 0.006% of S, 0.22-0.32% of Cu, 0.008-0.018% of Ti, 0.20-0.30% of Ni, 0.40-0.50% of Cr, and 0.025-0.035% of Nb. The invention further discloses a preparation method of the atmosphere corrosion resisting steel belt for the railroad car. The steel belt obtained through the method has good comprehensive mechanical performance and welding performance.

Description

technical field [0001] The invention relates to a low-alloy steel technology, in particular to an atmospheric corrosion-resistant steel strip for railway carriages and a preparation method thereof. Background technique [0002] With the continuous development of my country's national economic construction, atmospheric corrosion resistant steel has been widely used in railway vehicles. Choosing weathering steel as the material for manufacturing railway vehicles can significantly reduce the severe corrosion of vehicles in the atmosphere and improve the service life of vehicles. Among ordinary weathering steels, hot-rolled steel plates are most commonly used. With the continuous improvement of product requirements in terms of material performance, new weathering steels continue to emerge, and their performance is also continuously improved. High-strength weathering steel is a new type of weathering steel that has been widely used due to its low phosphorus content, high yield ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/04C22C38/02C22C38/42C22C38/50C22C38/48
CPCC22C38/04C22C38/02C22C38/42C22C38/48C22C38/50
Inventor 董丽丽黄利刘轩宇
Owner INNER MONGOLIA BAOTOU STEEL UNION
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