Economy type weathering-resistant steel

A kind of weathering steel, economical technology, applied in the field of low alloy carbon structural steel, steel structure, can solve the problems of high cost, complex process, difficulty in marketization, etc.

Inactive Publication Date: 2006-07-12
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above-mentioned patents have improved the performance of steel, the cost is

Method used

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  • Economy type weathering-resistant steel
  • Economy type weathering-resistant steel
  • Economy type weathering-resistant steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] Chemical composition of the present invention is as shown in table 1:

[0019] C

Si

mn

S

P

Cu

Cr

Ni

Al

0.12～0.21

0.2～2.0

0.7～2.0

≤0.036

≤0.034

0.1～0.4

≤0.006

≤0.013

＜0.2

[0020] Table 2 shows the alloy components of the examples of the present invention. The mechanical properties of this steel are shown in Table 3. The weight gain, polarization curve and electrochemical impedance spectroscopy (EIS) results of the laboratory 0.3% NaCl solution accelerated corrosion test are shown in Figure 1 (a)-(b) and Figure 2 ( a)-(b) and Figure 3(a)-(b). Figure 4(a)-(b) is a schematic diagram of the equivalent circuit of the EIS.

[0021] Example

C

Si

mn

S

P

Cu

Al

Fe

1

0.18

1.76

1.43

0.017

0.015

0.28

＜0.1

Balance

2

0.12

0.40

1.53

0.020...

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Abstract

The invention relates to economic air corrosion prevention low-alloy carbon constructional steel in the field of low-alloy constructional steel. It is mainly used in the steel structure which is used in air such as railroad, carriage, bridge and tower and so on. The alloying component and the percentage by weight of the weather fastness steel is as following: C: 0.12-0.21, Si: 0.2-2.0, Mn: 0.7-2.0, S <=0.036, P<=0.034, Cu: 0.10-0.40, Al<0.2, and other iron and impurity elements.

Description

technical field [0001] The invention relates to the field of low-alloy steel, in particular to an economical low-alloy carbon structural steel resistant to atmospheric corrosion, which is mainly used for steel structures such as railways, vehicles, bridges, and towers exposed to the atmosphere for a long time. Background technique [0002] At present, the former Soviet Union patent (SU1822446A3), Japanese patent (JP 9-277083, JP 1-92341), European patent (EP 0841 409 A1) etc. have introduced atmospheric corrosion resistant steel in the document technology that has been published at present, but It is generally used to add Cu, P, Cr, Ni, Al and other alloying elements to steel, and some also add As, Ce, Co, Ti, V and other elements. Although the above-mentioned patents have improved the performance of steel, the cost is too high, and the technological process is complicated, so there is great difficulty in marketization. Contents of the invention [0003] Aiming at the def...

Claims

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Application Information

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IPC IPC(8): C22C38/00C22C38/02C22C38/08C22C38/16
Inventor 董俊华韩恩厚柯伟陈新华
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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