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A preparation method of steel plate for low-cost ultra-low carbon train wagon

A preparation process, ultra-low-carbon technology, applied in the field of hot-rolled steel plates, can solve the problems of reducing the corrosion resistance of steel plates, achieve the effects of reducing curling temperature, optimizing process parameters, and improving corrosion resistance

Active Publication Date: 2018-10-26
CHINA RAILWAY MATERIALS TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, Fe 2 o 3 Oxide scale with a large phase content greatly reduces the corrosion resistance of the steel plate

Method used

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  • A preparation method of steel plate for low-cost ultra-low carbon train wagon
  • A preparation method of steel plate for low-cost ultra-low carbon train wagon
  • A preparation method of steel plate for low-cost ultra-low carbon train wagon

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Embodiment Construction

[0023] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0024] The invention provides a method for preparing a low-cost ultra-low carbon micro-alloy weather-resistant steel plate. The method includes the following contents:

[0025] 1) Composition design: the low-cost ultra-low carbon micro-alloyed weathering steel provided by the present invention reduces the content of Si element in traditional hot-rolled steel plates by 2%, reduces the content of Cr element by 14%, increases the content of C element by 2%, and increases the content of Cu element by 2%. Improve 15%, all the other element contents are constant, obtain final alloy composition and weight percent composition (total amount is 100%) as:

[0026] C 0.04-0.06%, Mn 1.50-1.60%, Si 0.13-0.15%, P<0.01%, Cr<0.10%, Cu 0.15-0.18%, Ni 0.02%, Nb 0.05-0.07%, and the rest is Fe.

[0027] 2) Hot rolling temperature design: the starting rolling temperature ...

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Abstract

The invention discloses a preparation process method of a low-cost and ultra-low carbon steel plate for railway cars, and belongs to the technical field of hot-rolled steel plates. Compared with a traditional hot-rolled steel plate, the contents of Si and Cr in the traditional hot-rolled steel plate are lowered, the contents of C and Cu are increased, in the rolling process, the beginning temperature and end temperature in precision rolling are increased, and the coiling temperature is lowered. The process method is simple in procedure and low in cost. Cheap alloy is selected to replace expensive alloy, and corrosion resistance of the weather-resistant steel plate is improved by optimizing process parameters.

Description

technical field [0001] The invention belongs to the technical field of hot-rolled steel plates, and relates to a preparation process of steel for train wagons, in particular to an ultra-low-carbon micro-alloyed weather-resistant steel and a preparation process thereof. Background technique [0002] At present, in the railway field, hot-rolled weather-resistant steel plates are mainly used for train wagons. Hot-rolled steel plates have superior mechanical properties and low market prices, and are widely used in infrastructure construction. However, hot-rolled steel sheets are easily affected by the corrosive atmosphere of the surrounding environment during storage and use, resulting in the failure of the steel sheets due to corrosion. The annual loss of steel plate corrosion in industrially developed countries is 2% to 4% of the total output value of the national economy. In the past 20 years, the development of my country's metallurgy, chemical industry, energy, transportat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/04C22C38/02C22C38/18C22C38/16C22C38/08C22C38/12C21D8/02
CPCC21D8/0226C22C38/02C22C38/04C22C38/08C22C38/12C22C38/16C22C38/18
Inventor 阎晓倩董华利张军政王振强杨帅刘懿乐
Owner CHINA RAILWAY MATERIALS TECH